 | | 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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