 | | Re: Hardware Problems
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(...) All I can add is that is what mine does, and it seemed to break when I hooked up a 'normal' 12V battery charger, which is opposite polarity to the HB charger requirements. According to the diodes in the diagram, this shouldn't be a problem, (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
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| | Re: line following
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(...) This one's pretty easy. Two IR detector/emitter pairs along the bottom, midline of the robot (say, about 1cm or less off the floor). The algorithm is to keep both detectors over the black tape (i.e. a low reflectance reading); if the right one (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
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| | Re: line following
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(...) He have (had?) some robots here at work that were used in the production areas, and they followed a line on the floor. I've not studied them carefully, but I think they work something like this: Two reflective photosensors are aimed at the (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
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| | Hardware Problems
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Hello, I'm having trouble getting my Rev 1.2 Handy Board up and running. It did work once and then the following symptoms: I start the mac based down loader, which download the bootstrap code fine. Both charger board and the handy board's serial (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
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| | store variables in RAM after reset
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Hi guys, I'm new to the interactive C. Does anyone know how to declare an array of variables which can be changed by the program and stored in the RAM and their values stay the same even after reset? Second, I'm aware of something called the (...) (27 years ago, 15-Apr-97, to lugnet.robotics.handyboard)
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| | Expansion interface.
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I have a question about the expansion interface. If it is decided upon the 1Amp 9V transistors...would it be a problem for the HB's 1Amp Voltage regulator or the fuse? (27 years ago, 15-Apr-97, to lugnet.robotics.handyboard)
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| | line following
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Hey all, I'm looking for some ideas on sensors and algorithms for a line following robot (black tape on white floor). If any of you have had some luck at this or know where I can find some info please let me know. Thanks Rajesh (27 years ago, 15-Apr-97, to lugnet.robotics.handyboard)
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| | Re: motor routines in lib_hb.c
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If I'm not mistaken, (someone please corect) those speeds represent the actual shape of the waveform. Let's list some details. 1. Each bit 0 or 1 represents 0V or 9.6V. (or whatever external source) 2. Each bit represents the above voltage for a (...) (27 years ago, 15-Apr-97, to lugnet.robotics.handyboard)
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| | Re: motor routines in lib_hb.c
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(...) Think of them as repeating binary waveforms (they are clocked out the 'enable' pin of the motor chip at 1Khz) so on an oscilloscope speed 2 (third entry) would appear.. time -> 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (in mS) Vmotor : +--+ +--+ (...) (27 years ago, 15-Apr-97, to lugnet.robotics.handyboard)
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| | Re: motor routines in lib_hb.c
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(...) These 8 bit masks are the most symmetrical way to to organize speeds of 0 through 7/7. You could rewrite the code to accept a byte and use that as the mask, but unless you think it would save space, it's a waste of time. The miniboard routines (...) (27 years ago, 14-Apr-97, to lugnet.robotics.handyboard)
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| | motor routines in lib_hb.c
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Does anyone know why these eight speeds were chosen in lib_hb.c for the motors and what would happen if the code were re-written to allow any speed between 0 and 255? int _speed_table[]= { 0b00000000, /* speed 0 */ 0b00010001, 0b01001001, (...) (27 years ago, 14-Apr-97, to lugnet.robotics.handyboard)
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| | Re: NOTE 04/10/97 10:50:15
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OK, I haven't looked at encoders.asm but if the following doesn't help just send more questions. (...) Sounds about right. (...) TCTL2 sets rising, falling, or both edge modes; TMSK1 arms interupts; IC event sets the TFLG1 register. (...) correct (...) (27 years ago, 14-Apr-97, to lugnet.robotics.handyboard)
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| | QFP sockets
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Hi, Thanks for the response on finding a microcontroller. I have 1 little problem left: if I'm going to use a Motorola 68F333 or the somewhat cheaper 68HC916Y1 I need a conververter from 160-lead QFP (.65 pitch) to an "normal" pinout where I can (...) (27 years ago, 14-Apr-97, to lugnet.robotics.handyboard)
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| | RE: HB books
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Mark Robillard has written 2 good books on robotics. No one has mentioned these books here before, so I though I would list them. Here are the 2 book titles : * Microprocessor controlled robotics * Advanced microprocessor controlled robotics These (...) (27 years ago, 14-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sencdr0.asm
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Yes, but why? Is the contents at ADCTL+X supposed to change? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of (...) (27 years ago, 13-Apr-97, to lugnet.robotics.handyboard)
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| | Fried analog port
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I was taking some measurements of sensors by reading the value on the LCD display. Suddenly poof a burst of smoke came from the analog port (0). Now the only reading I have on that port is 1, but the other ports are fine. Could I have somehow fried (...) (27 years ago, 13-Apr-97, to lugnet.robotics.handyboard)
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| | My Robot, "JERK"
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To those interested: For those who are interested, I have posted pictures of robot at URL = (URL) it isn't totally complete, the construction is, for the most part finished. It is mobile and can almost traverse the maze it was designed for. Thanks (...) (27 years ago, 13-Apr-97, to lugnet.robotics.handyboard)
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| | HB Simple Encoder Routines
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Hey everyone, My partner and I are trying to use the sencdr?.icb and fencdr?.icb routines to keep position measurements of a robotic arm. The encoders are break beam and provide a signal of 4kHz max. We used 4 J-K flip flops to reduce this frequency (...) (27 years ago, 13-Apr-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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I once saw something like this, but it was very complicated to build. There were TWO separate arrangements of your wheel descriptions, and they were hinged from a set of "hips". I believe this is because, as wheel 1 is pivotting over the front edge (...) (27 years ago, 13-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors... antistatic foam -Reply
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(...) That's exactly the stuff. I saw a demo of this in class, so I can't give you specifics, but it's the sort of experiment that takes about 6 minutes to try on your own. Note, however, that there are a few different kinds of the foam: i mean the (...) (27 years ago, 12-Apr-97, to lugnet.robotics.handyboard)
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| | sencdr0.asm
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In the program sencdr0.asm, what does the line: BRCLR ADCTL,X $80 * for? Thanks for any help. :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The (...) (27 years ago, 12-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Re: Parts substitution
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|
(...) In this case, no problem. The computation of power is simple... Watts = Volts X Amps and ohms law is... Volts = Resistance X Amps Using the traditional I = current (they say it comes from the French word for Intensity) R = Resistance E = (...) (27 years ago, 12-Apr-97, to lugnet.robotics.handyboard)
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| | HB books
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Hello, Does anyone know what books are avaible about building robots with the HB as microcontroller? Thanks Emiel Agema (27 years ago, 12-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Re: HB files
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Postscript files are generally for printing out. Therefore, you send a postscript file to a "postscript printer". Most HP Laser Jets are. Otherwise, you can use a program called GhostView. It's a viewer that has postscript capabilities. I think it's (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re:
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(...) Now _this_ is a challenge. Presumably you've read the treatment on step climbing robots in Marvin Weinsteins "Android Design" ((URL) is out of print but still in libraries. It takes a _lot_ of energy to move up stairs. Basically you robot has (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | HB files
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Help! I can't open any of the files at the cherupkha site. I presume these are "postscript" files. I've tried various apps to view them without success. I'm workin in a PC enviroment, no MACS or unix. I keep readin about the great libraires out (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: BotS on TV
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As usual, this mundane matter of workin for a living has interfered yet again with the more pleasant pursuit of robotics (read: missed the show). Was this a PBS show? I would love to have seen this. Does anyone know when this might be shown again? (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors... non-conductive foam
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Max> Do you think it would also be viable to use a soft Max> NON-conductive foam and then measure the capacitance instead of Max> the resistance to work accurately with lighter pressures? Actually this will work better. I built a grid sensor using (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors... non-conductive foam
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(...) What a neat idea! Sounds nice and compact and simple to build too. Do you think it would also be viable to use a soft NON-conductive foam and then measure the capacitance instead of the resistance to work accurately with lighter pressures? (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi, fellow (ro)Botters! Did anyone watch Scientific American Frontiers on Wednesday? If not, or even if you did see it, check out www.pbs.org . PLEASE SEE IT! there's a lot of good links, a complete transcript, and other goodies. But now, onto my (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re:
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(...) yup, it was too short! (...) Phil, couple of questions for clarity. Does it need to go up and down the steps or just up? does it carry stuff? Why is step climbing needed? It might be easier to make a wall climbing bot...or a bot that can leap (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Bots on TV - Nice IR app
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I said (...) You asked (...) (URL) are developing a version of IC for commercial release and are linked via the HB page's software resources page. J (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: your mail
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|
No, you can't use PWM outputs that swing from about ~10v-~4v for *digital* output. However, you can pull the 74HC374 (see motor output schematic) out of socket and put a 16pin ribbon cable(rat shack) in the socket. Then take the other end to a (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Looking for a good microcontroller.....
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If you can use an I2c chip, then the Motorola MC68HC11E2 has 2k of EEPROM and costs about 8-10 dollars. You can try contacting Motorola for samples if you are a student I have heard they are free. You need a school letterhead signed by a proffessor. (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: voltage divider
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Hi Victor, I believe you mean "built in pull up" resister on HB. Yes, you need to take 47k pull up register into accound for the voltage devider circuit. -Pandit ---...--- (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Bots on TV - Nice IR app
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So, I saw the Scientific American show on PBS and I was completelly geeked! It was too short. I was most impressed by the tennis ball capturing contest and by Newton Lab's Vision Car entry. Cognachrome is very cool. After seeing the show I logged on (...) (27 years ago, 11-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Parts substitution
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(...) I believe the wattage just tells you how much power the resistor can reasonable dissipate. Therefore using a transistor which can dissipate more power than what the design calls for is alright, but using one that dissipates less power is bad. (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Parts substitution
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I have a question on the replacement of the a specific resistor. On the handyboard there is a 3.83K 1/8W resistor. I just received in the mail the last pieces for the board and was shipped a 3.83K 1/4W resistor. Is the wattage citical on this (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Looking for a good microcontroller.....
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Hi, This question doesn't really belong to this mailing list, but since some of you know quite a lot about microcontrollers I thought maybe someone could help me. I'm working on a project about A Management System for an Optical network. Therefore (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Re: IR in programs
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(...) Here is a simple example of how to do 'different things' when you press various buttons on your remote. If you press digits, they are displayed on the LCD. If you press rewind, the LCD is cleared. When you press stop, the program ends. If you (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | NOTE 04/10/97 10:50:15
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Hi, Can someone help me understand encoders.asm? This is what I deduced from the code and I'm wondering if my guess is correct. 1. When TIC3 and TIC2 inputs are changed, an "interrupt" in execution occurs and and execution immediately jumps to the (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | voltage divider
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could the voltage divider circuit shown in the Mobil Robots book (page 116 fig5.20b) be implemented as is OR does the built in pulldown resistors cause it to be modified. Thanks for all the brain dumps, victor (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | IR in programs
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How would I use an if/then statement if I used the onboard IR reciever? Earlier, I downloaded a program that Max Davies wrote to determine the different variables for my remote. In the readme file, it says that the rules are set by a command like (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Somewhat C challenged.
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Victor, The peek(0x1000) statement returns the byte at memory location 1000 (hex). In C, the '&' operator is a bitwise AND. So, what you are doing is ANDing 4 and the contents of 0x1000. What's really going on is you are interested in only bit 3 (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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|
Hello! Just 1 thing today: 1. Is there any sort of chip that can be wired up to the HB's motor ports, and then convert it to 16 (or less, maybe) outputs? phil thehahns@nconnect.net PS: does anyone know of any robot designs that will allow a robot to (...) (27 years ago, 10-Apr-97, to lugnet.robotics.handyboard)
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| | hb_ir.c
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In the hb_ir.c and the hb2_ir.icb Regaring ir_counts(4) what ports is this using. digital(?), analog(?)? What is it counting? (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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If I recall correctly, I think the BINH in the sonar software is set high for the entire duration of the ping. This way, ECHO will never trigger. If you tie your BINH to GND, it will enable ONLY the internel blanking. ---...--- ericson mar Master of (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | MORE IR
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I am going blind reading the archives for the solution to this problem so I will just ask. Ive got a Radio Shack tin can IR reciever plugged into digital(7). An High output IR LED w/ current limiter resistor in series (LED was getting quite warm) (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Somewhat C challenged.
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|
Please excuse my bitwise ignorance. Could someone explain this statement to me. if (4 & peek(0x1000)) what does peek(0x1000) return? what is the 4 for ? and what does the "&" compare? thanks victor (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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Keith> Just to fill all of you in, I followed Tom's advice and it is Keith> working now. I am going to install the resistor on BINH Keith> tonight so I will get the extended range. By the way, what Keith> value resistor is best for this signal? I (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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|
(...) Remove the BINH and check the sonar readings...the minimum distance it can read will be about 16-17" (this is with an internal blanking OF 2.38millisec) this time can be modified by adding a resistor to the BINH. Also the ECHO goes into the (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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(...) Just to fill all of you in, I followed Tom's advice and it is working now. I am going to install the resistor on BINH tonight so I will get the extended range. By the way, what value resistor is best for this signal? I know that the suggested (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: sonar hookup
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K> I finally got the code loaded into my handyboard to test the unit K> but I am having some problems. When the program runs I hear K> ticking from the transducer but the reading on the LCD stays at 0" K> no matter where it points. I want to make (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | sonar hookup [DAT]
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I finally got the code loaded into my handyboard to test the unit but I am having some problems. When the program runs I hear ticking from the transducer but the reading on the LCD stays at 0" no matter where it points. I want to make sure that I (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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|
If the IR LEDs both add up to a current requirement of 800ma (the spec on the ztx614) then yes you should be able to. You may want to add a resistor to supply that assures you don't get more than 800ma from supply (if that is Imax for those LEDs). (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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JM, I don't have the book in front of me but Mobile Robots, From Inspiration to Implementation has some info on just this subject. If you don't have it or can't get access to it let me know and I'll do some research for ya. For example if its touch (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors... antistatic foam
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|
A viable option, depending on what sort of pressure is involved, is to put a thin piece of conductive (ie. antistatic) foam between two metal plates. The resistance between the plates ends up being roughly proportional to the pressure applied. It (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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(...) Can we not tie two IR LED's in parallel and plug into the IR port on the HB. ? (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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|
What you can do is just like the schematic for the built-in IR emitter circuit. You need to either software generate your wave or do it like the schematic. If software generated, this output would come from a output port on the HC11 to a transistor (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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James, You can get Forse Sensing Resistors,and you can use strain gauages, but I find the easies thing is to make a bag or balloon of the shape you want, connect a tube to it, and use a small air pressure sensor. These are very cheap and readily (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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(...) Hi James , What sort of Pressure sensor are you looking for ? air Pressure , Water ? let me Know , i work for Motorola Semiconductor we have a few avaliable let me Know via the list or return email Regards Bruce Given Montreal, Quebec, Canada (...) (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Sony IR
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Could someone tell me what the signal from a sony remote looks like (freq, period, etc and how it is read by the sony-ir program distributed with IC) Thanks!! Tom (27 years ago, 9-Apr-97, to lugnet.robotics.handyboard)
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| | Re: ??? Last minute sanity checking for a new board
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this is basically right, read the "appendixb" document listed on the tech docs page for this kind of info....... re: hb board size, it's sized so it will fit into a commercial plastic enclosure that holds an 8 cell AA battery pack. -fred (URL) your (...) (27 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | Re: pressure sensors..
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Try www.infusionsystems.com. Let me know if they are able to fill the need. Thanks. ---...--- Adam B. Cox check out my web page Computer Engineer (URL) Communications Corp. vmail: 416-241-7000 (x224) ---...--- (...) (27 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | ??? Last minute sanity checking for a new board
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+---...---+ | NOTICE! I'm posting from a host that is not always available. If your | | email to me bounces or you want to be sure, use 'brat@naxs.com'. THNKS | +---...---+ Fred (or anybody)- I'm doing some last minute sanity-checking on a project (...) (27 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | pressure sensors..
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|
hola all, I'm working on a project where I need to use a thin pressure sensor. Does anyone have any idea where I could look to find such a sensor. -james montgomery MIT '98 (27 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Re: Redfox racer photovore
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|
(...) m> Hi all m> I got it in my mind to build the M.I.T. photovore that is pictured m> on page 35 of "Mobile Robots". I have been able to track down the m> October 1988 issue of Omni magazine which contains the m> article/schematic on building the (...) (27 years ago, 8-Apr-97, to lugnet.robotics.handyboard)
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| | Flame Detection
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In a past e-mail, Yoni Garbourg (sorry Yoni, I couldn't find your email address) posted a message inquiring about flame detection. Adam Cox responded about finding sensors at www.infusionsystems.com. Yoni, what did you decide to use? I have had some (...) (27 years ago, 7-Apr-97, to lugnet.robotics.handyboard)
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| | nonrobot HB applications.
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I would be interested in seeing a list of applications that the HB is being used for other than small robots. thanks vic (27 years ago, 7-Apr-97, to lugnet.robotics.handyboard)
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| | Re: running 2 IR
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|
You mean IR "emitters"? (IR LED) If i understand you correctly, you wish to source current with the digital outputs. The digouts are from the HC11. There can't source enough current to light IR LED's. ---...--- ericson mar Master of Engineering (...) (27 years ago, 6-Apr-97, to lugnet.robotics.handyboard)
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| | running 2 IR
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|
I want to be able to run 2 or 3 IR xmitters from the single output on the HB with no additional hardware. Is there any problem with hooking two or 3 IR transmitters to the ground of the IR output and running the +5v from digital outputs. Then switch (...) (27 years ago, 6-Apr-97, to lugnet.robotics.handyboard)
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| | handy board as VU meter?
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I was just thinking the other day - could a handy board be made into a VU meter? (Digital readout on the LCD, or using the motor lights, etc.) Is it fast enough? If so, how could a line level audio signal be fed into one of the analog inputs? If (...) (27 years ago, 6-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Can the handyboard be taught to talk?
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|
My lab partner and I are going to make our robot talk using a voice recorder/player chip from www.isd.com. They are easy to use. Don't know if this fits your purpose. jm (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: analog header
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Certainly the voltage follower will work. But I had a similar problem adjusting the sensitvity of a photocell that I solved by paralleling a pullup resistor of my own to get the proper impedance. You might try putting a 1 ohm (yep, thats one NOT 1k) (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Can the handyboard be taught to talk?
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|
(...) Actually the SP0256 and the companion Text to Speech chip supported a 'serial' mode that was much easier to use (you could use the same software uart I just posted.) Don't get your hopes up however, the speech is crude to say the least. I used (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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|
(...) You're more than welcome. As for mounting: I have found that custom cutting stainless steel brackets with a dremel tool to be most effective. Sturdy but flexible for purposes of fine adjustment. Basically it's a long tab that slides through (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Can the handyboard be taught to talk?
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|
Hello! REmember when I kept on asking those (yes, maybe annoying) questions about the LCD inputs and outputs? WEll, here's the reason why. On Pages 193 to 200 of the book the Robot Builder's Bonanza- 99 inexpensive robotics projects, author Gordon (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| |
| | Re: analog header
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(...) This is known as an 'impedence mismatch'. Basically your NPN amplifier is incapable of driving the analog input low (which in itself seems a bit weird since you only need to sink .1 mA to do that which suggests that perhaps there is feedback (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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(...) Hi all, i just tested my polaroid sonar and it works great. Thanks to Kent and Adam. BTW..with the BINH, iwas getting 1"...but when i removed it as suggested by Chuck Manis (in some old mail)...it's reading the correct distances. So i guess (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Does anyone have asm (icb) code that utilizes the pinouts of the motor port 1+2 (motor drvr chip removed) to drive a stepper motor. Only 2 digital outputs would be required... one for stepping and the other for selection of direction. Thanks. (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | expansion header
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Does anyone know how I might turn a selected output on the expansion header low. These outputs are normally high and reading the docs tells me this header is used for chips selection. Other than chip selection, this header could be utilized to (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | analog header
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I am currently trying to put together an IR collision avoidance system..... I'm using the HOA2498-002 IR diode/transistor package which is hooked up to a darlington pair (increased sensitivity) Using a digital output to turn on the diode via a (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Sonar problems
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I remeber there being some kinda control character like a line feel or something. This is due to the difference in environments, DOS, unix, etc. This might be the cause of your problem. I think I had some trouble with this too but I forgot all about (...) (27 years ago, 5-Apr-97, to lugnet.robotics.handyboard)
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| | Better assembly code
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I went home and got my Pink book, the menemonics on this 'software output only' UART are now correct (assume PORTA bit 7 (PAI) as the output pin) ; ; Called with character to send in A ; Destroys A, B, and X ; serout:: SEI ; disable interrupts LDX (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Sonar problems
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I have The Polaroid sonar system hooked up as stated in the readme file that is on the web page but I can't get it to work. I downloaded the five programs in the sonar directory and when I try to download them I get errors. I can't get the ICB file (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Wire wrapping sockets
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(...) Sure, over 20Mhz or so. I've breadboarded 16Mhz 80286 systems on these things. Don't use the long connections (along the edge) of the board for signals. Also the chance of any given breadboard connection being flakey is about 1 in 200. So if (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Wire wrapping sockets
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(...) Check out www.cgntech.com, these guys have wire wrap sockets for the 68HC11. But they also have something _much_ cooler. They have a small board which consists of a 68HC11, RS-232 circuit, address latch, and buffer logic, with wire wrap pins (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Wire wrapping sockets
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Hi, Sorry this is on a different note. I was wondering what the advantage is of using wrie wrapping over breadboarding. Someone told me that breadboarding has alot of capacitance and will slow down the circuit at high speeds. Is this so? ---...--- (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Wire wrapping sockets
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I am thinking of building a second handyboard for myself but I want to make a few changes to the design. I need to know if anyone knows of a place to buy a 52 pin PLCC wire wrapping socket for the 68hc11. I am aware that there are adapters to (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: Mini SSC - Scott Edwards
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(...) Stop the presses! You should have gotten documentation with the SSC but since you are apparently missing it (and its small anyway) the relevant information is that the Mini-SSC uses a serial interface to control its servos. You must send down (...) (27 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: power supply
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I have never done much battery work and I was wondering if using a separate battery with a common ground to the HB has caused anyone any problems during charging or any other situation. I have common grounded a 3v battery pack to the HB supply to (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: photo sensor quesion.
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If you have a device that uses the handyboard supply to generate voltages then just voltage divide the output to the correct 0-5v and input on the analog ports. If you are using phototransistors or something similar there are lots of photo circuits (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: LCD Panel Substitute
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Any 16x2 LCD with a Hitachi HD44780 controller chip will work. I got mine from wirz electronics at www.wirz.com (go to serial lcd displays and they sell the LCD separate for $8 bucks!) There are lots of displays that use (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Mini SSC - Scott Edwards
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Hi, I am working in a group to make a six legged robot. We are using the Mini SSC from Scott Edwards to control the servo motors. We've connected the digital output #9 from the Handy Board to the S(in)#2 pin of the SSC. We also connected the signal (...) (28 years ago, 4-Apr-97, to lugnet.robotics.handyboard)
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| | Re: photo sensor quesion.
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Solar panels? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | Re: power supply
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I've found that alkaline batteries work well. I used it to power motors too and they seem to work fine. I tested a flashlight bulb and found that it drew 0.79 A at the rated voltage. So alkaline, D-cells at least, can handle the current. ---...--- (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | photo sensor quesion.
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I understand how a photoresistor that varies in restistance can be connected to the analog inputs. But what about the photelectric elements that generate voltages varying with light. (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | HB Design Question--??
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+---...---+ | NOTICE! I'm posting from a host that is not always available. If your | | email to me bounces or you want to be sure, use 'brat@naxs.com'. THNKS | +---...---+ Fred (or anybody)- I'm doing some last minute sanity-checking on a project (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | power supply
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Anyone? I'm wondering if a 9V Alkaline battery could replace the battery pack in the HB. I'm merely going to use the 9V battery to power the HB and its memory. I'm not going to use any of the 5V-line supplied by the HB. In other words, all the (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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| | Re: LCD Panel Substitute
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Are you overlooking the obvious source of LCD panels - Timeline? I only mention this because it hasn't been mentioned in the postings. Timeline is listed on the Handy Board web site, and they are about the cheapest supplier. I got a bunch of (...) (28 years ago, 3-Apr-97, to lugnet.robotics.handyboard)
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