 | | Re: SONARS GALORE!!!
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HI Adam, Please post your schematic as you mentioned. I am interrested. Thank you, -Pandit ---...--- (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re:system time
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Hi Joe, I am glad that you get it going. For casting, you can cast variables as well. Again, it is best to avoid any type casting if you can. I would not encurage any one to do much of casting if not necessary. Some programing language makes this (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Some answers on Re: Sonar and the handyboard
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Adam and Tom have been exchanging quite a bit of mail on the topic of Ultrasonics and the Handyboard. A lot of good information has come to light as well as some misinformation. I've spent some time figuring out just what is what, and this is the (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re:system time
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Pandit, Thanks a lot for your help.I had already thought that it could be the board running out of resources that caused the problem but I am not very experienced with programing.I agree with your improvements on the program and will implement them (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Runtime Error 3
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Hi Peter, Well let me give it a shot, without actually downloading it to the Handy Board. It should go something like this: /* GLOBALS */ int num_sensors = /*put the number of analog sensor inputs you want*/ void main() { int sensors[num_sensors]; (...) (28 years ago, 22-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, I put the cap in too - never noticed much defference. It must just be for some minimal filtering of noise. I don't know how well you know Ben, but it sounds as though you will probably be fixing this one solo, eh? Do you have manuals? I'll look (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Runtime Error 3
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I'm kind of new to IC and I don't know how to deal with all the errors yet. I wrote a simple code to record sensor inputs every 15 minutes. This is the code I wrote: void main() { while(1) { int x[]; int s=analog(0); int f=0; s=x[f]; sleep(900.0); (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) I wouldn't think so. I am looking in Kents documentation, and sure enough, there is something about putting a resistor on BINH. Also something about putting a cap in C7 on the ranging board. I'll play with things tonight. (...) Good thinking (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, You mentioned that the INIT has the 330ohm. I'm pretty sure it's the BINH and NOT the INIT that should have the 330ohm. Reread Kents documentation. I don't think you would have damaged the unit in this short of time. Like I've mentioned on many (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Ahh... This sounds right from when I had the same problem. I just forgot about the disconnecting of the BINH. Mainly because it was accidental at the time. Anyways, the point I wish to make is that you have a bad ranging unit. This symptom is (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Thanks, I followed Chuck M's advice, and disconnected the BINH, and the thing words, with 23" as the minimum distance. (...) I would have to possibly agree. I noticed in your earlier mail you have suggested putting a 330 ohm resistor between INIT (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | SONARS GALORE!!!
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For those who are interested..... I have recently developed a way of signalling 4 sonars from the HB using a logical switching circuit controlled by one ranging board and another board developed to switch which transducer is being signalled by the (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, I purchased 2 OEM kits (4 ranging units w/transducers) From this I had 3 bad ranging units. You'll notice a socketed chip on the PCB. I would suspect that this chip is suspect to failure. Anyways, in order to solve your problem, I would suggest (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Interactive C Sample Source
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Is there any sample source avail on the web/ftp of IC routines. Like generic routines for object avoidance, navigation, light following, sound following stuff like that. (...) ___...___ Victor Clark Xerox Document & Data Services Xerox Corporation (...) (28 years ago, 21-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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Yes. I use 12 V motors with these chips. The 1A ones. ---...--- 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 (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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mine is doing the same thing only it displays 7" i hear ticking constantly HELP bryan wiabel offrds2@aol.com (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) The one that is mounted is in a plastic box, glued in with silicon glue. The unmounted one was laying on my bench pointed at the ceiling. (...) I assume the 'blank inhibit' pin is BINH (docs are at home, I am at work), and that is connected to (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) Since 8" is the 'minimum' distance the board can see, I strongly suspect that your transducer isn't sufficiently damped. This will cause it to continue 'ringing' after the pulse is sent and when the receiver switches on, its still vibrating so (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | IR for bots
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Hello everyone, My thinking (albeit limited), has been that simply driving an IR LED with ac (ie:40Khz) as opposed to static dc, is enough to discriminate it from other frequencies like 60 Hz. or whatever. Then, when the detector picks up sufficient (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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(...) The motors are 12 volt 1 amp motors. I know that the piggyback method will give me the higher current but I am not that fond of that method. I would prefer to have one controller that has power to spare than a rigged system that will just (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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(...) I am running 12 volt motors that draw about 1 amp each. They were the only motors that I had available for the project so I made due. Keith Keith Soldavin kas219@email.psu.edu (URL) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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(...) Yup. I have one of those tapeless tape measures with the smaller transducer, and the handyboard connected one is louder, so I wonder if that might be something? (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Tom, Are you hearing a ticking sound coming from the transducer? Let me know. (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Hi, with all this talk of sonar, I thought I finally get to hooking mine up. All I get is 8". If I unplug it, I get 0". I'd swear I have it hooked up right. Someone sent out a mail earlier this week, and I had mine hooked up just like it said. I (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | RE: Motorola Microprocessor source
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I got my 6811s from Allied Electorics - www.allied.avnet.com My LM052Ls came from Marshall - www.marshall.com For the Sharp IS1U60, I substituted the Sharp GP1U58Y. I got them from NovaSoft 1-804-272-5752 or 1-407-672-6780 Note that the pin (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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Keith, How much current do your motors require. The SN754410 offers 1A per channel. If your piggy back them you can increase this to 2A/channel. Let me know. (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: External power for motors
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Phil, Let me tell you that when someone made the same suggestion to me I hade to reconsider the demolition of my beautiful (expensive!) HB. My solution is this.... Simple take up pin 8 of the driver chip (SN754410) and wire it so that it may be (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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Keith, On the ftp site under ???/contrib/kent/sonar there should be a file called sonartst.c This file tests the unit goven that you've included sonar.icb in the initial loading of library files. The file simply calls the ping(0) routine then waits (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Re: New motor drivers
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The 18200 requires 12V motors, is that what you have? I ask because they are fairly unusual in small bots. --Chuck (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | New motor drivers
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Does anyone know an easy way to replace the motor drivers on the handyboard with the 18200 chip from National Semiconductor? The motors I am going to be driving need more current that the old ones can put out so I need to upgrade. I know that they (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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| | Motorola Microprocessor source
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Does anyone have a source for the following parts or suitable substitutes: Motorola 6811 microprocessor Hitachi 16x2 LCD Sharp IS1U60 infrared demodulator SGS-Thompson L293D motor driver William F. Conroy III conroyw@acm.org Lt Col, USAF (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Motorola Microprocessor source
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(...) Most Connor disk drives have a 68HC11A1FN on them. If you find someone throwing one away, it is a cheap HC11. (...) Digi-key sells these. (...) Ben Wirz sells these. Also look for the TI replacement possibly. (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Hall Sensor
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Hi, Does anyone have recent model #'s, part #'s, or suppliers for Hall Effect magnetic sensors that interface directly with the Handy Board. There is a picture of a Hall sensor on page 52 of the Handy Board Technical Reference, but no part number or (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| |
| | Re: system time
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please get me off this mailing list (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) I just looked back to the IR transmitter schematic... The 1K res + RED LED you see there is for the only purpose of having a visible feedback of IR transmission. The IR Led and it's limiting resistor (if the case) will be connected in series (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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On Wed, 19 Mar 1997, Stefano Nardone wrote (...) Thanks! that was not clear, where did you find info on j7? Is there a IR transmitter in the parts list? I didn't see one? Do you know what to use for a transmitter? thanks, jm (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | LCD compatible
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Does anyone have experience using a Truly MCC162A1-2 16x2 LCD? I bought one from Wirz electronics for the handyboard. In assembly step 6.something, it says to power it up and there should be *faint* segments lit, if they are dark check pin1 to (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) How are you gonna get 100 ma through a 1k resistor biased by 5volts?? The max would be 5ma. I have *never* heard of a LED this size that can handle more than 20ma!! This LED is tiny. I don't know where pin one of the jumper goes to or its use (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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(...) I think it must better be a darlinghton and it must support enough current: if you want to get 0.1A or more pulsed current in the IR led, the transistor must have a rather high current gain, more than that of an ordinary npn trans (by the way (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | system time and casting
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Hej >joema@mpx.com.au wrote: >When I try to use the system time as part of an expression >in an if-else statement I get an error message while >trying to download to the board. Goes something like : >type <float> cannot be used in a conditional >Is (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | mail bounces
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dear all, please be aware that whenever you post a message to the list, you will get some bounces back. this does not mean your message didn't go through. instead, it means that there were a few bad addresses on the list. there are always at least (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | Re:system time
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Hi Joe, The mail bounced back to me. I am resending the mail again. -Pandit ---...--- (...) (28 years ago, 19-Mar-97, to lugnet.robotics.handyboard)
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| | External power for motors
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Hello, Y'all! I was wondering if anyone has done this: Cut the trace leading to the H.B. Motor driver chips, and then re-wired it so that you can use external power supply/ I know I saw it somewhere on the 'web... Could anyone give me a URL or (...) (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR collision avoidance
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(...) The Radio Shack LEDs should work fine. The trick is that these things are very sensitive to intensity, duty cycle, and frequency stability. To modify intensity change the amount of current flowing through the LED (lower resistor value == more (...) (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR collision avoidance
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(...) could u please tell me where u bought the infrared LED's? The one that i bought from radio shack (part no.276 143) is giving a maximum range of 7.5 inches and i badly need to sense atleast 1 foot. thanks Sriram We didn't want that (...) (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | mini boards
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Douglas Electronics also sells blank Mini Board PCBs. See the "get your hands on a handy board" link for contact info for Douglsa. -Fred (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re:Re:system time
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Hi Joe, From the code below I see that there are a few things that I see that may be a bit incorrect. In the main() function, I see that there is a statement "while(1);". This statement is a complete C statement which will loop forever with out any (...) (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re:Re:system time
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I've posted the wrong code. Try this one: void time(int d) {d+=1;} void main() {int d; while(1); start_process(time(d), 1, 50); } Joe (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re:system time
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Pandit, I thought that I would post it to the mailing list.It seems to work fine on its own but I had problems using it in one program.If I reconfigure a bit I might get it to work. void time(int d) {d+=1;} void main() {int d; start_process(time(d), (...) (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | mini board boards
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Does anyone know who I can puchase a couple of mini-boards? I only need the printed circuit boards. I don't need a full kit. Thanks Ed Arnold hilander@bellsouth.net (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re: RMB
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|
In a message dated 97-03-17 19:17:14 EST, mar@cooper.edu (MAR ERICSON) writes: << Does anyone know what RMB means in Assembler? >> I think it means "reserve memory byte" Jim Eaton (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | Re: RMB
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(...) RMB (Reserve Memory Bytes) RMB directive advances the location counter by the value of the expression in the operand field, effectively reserving a block of memory. The block of memory reserved is not initialized. Example: Location Counter (...) (28 years ago, 18-Mar-97, to lugnet.robotics.handyboard)
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| | compiler,code length, etc
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Hi, I'm using a very old freeware version of ICC11 for my miniboard programs. According to the documentation files that I have, it's from 1993. Is there a more recent version of a C compiler that I can use for my miniboard programs, maybe one that (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | RMB
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Does anyone know what RMB means in Assembler? ---...--- 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, 17-Mar-97, to lugnet.robotics.handyboard)
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| | PWM
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Does the handyboard produce PWM if so what ports and how many. Is it hardware or software generated. (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar and the handyboard
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|
There's a program that already does this that comes with the stuff you got from the kent directory. Check the files. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re: ds1233-10
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(...) I bought mine from JDR: < (URL) > A search for "ds233" at JDR yielded this: Product Info PRICE ---...--- BUY DS1233 $1.79 DALLAS 5V ECONO RESET, TO-92 (-10) 1 products found! (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Sonar and the handyboard
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I just bought the Polaroid sonar unit and I need to test it. I have downloaded the sonar drivers and hookup instructions from the FTP site but I need some help. I want to write a small program that will take a sonar reading and display the distance (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re: controlling an opto isolated motor
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(...) I've got a MOSFET h-bridge I built that uses an opto isolator and it talks to the Handyboard, I don't know if it will solve your problem but I'll tell you what I did with it. I've designed in a "Handyboard" mode. In this mode you can connect (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re: ds1233-10
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Did you try : Insight (1-800-677-6011) supplies the Dallas Semiconductor voltage monitor (DS1233-10).? from the handyboard web page: (URL) where I got mine. jm (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re:system time
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(...) Since the system time is already provided, creating a process which runs every millisecond to achieve this may not be in your best interest, and will probably slow things down quite a bit. I dont recall whether the system clock counts in (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | HOW TO UNSUBSCRIBE
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Please, do not send unsubscribe requests to the main Handy Board mailing list. Instead, send them to me, Fred Martin, fredm@media.mit.edu. I am the only person who can remove you from the list. Thank you for your consideration of others on the (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | re: ztx614
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If I have interpreted the schematics correctly almost any npn can be used for the ztx614. The 614 simply provides ground for the IR transmitter with a collector current of about 3ma. The base current is set by the 10k R to about (5/10k) 0.5ma. If I (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | unsubscribe
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Please unsubscribe me. ejevremo@alum.uax.es (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Re:system time
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Hi Joe, Do you have the C-code that you are attempting to use and have the problem with ? Could you please post or send it to me ? I could not see any thing wrong from what you described in the mail. It is clearer to see the code. Regards, -Pandit (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re:system time
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Pandit, As far as I know I can only read system time as along integer or floating point number(both cannot be used in conditionals).I do not know what casting is.One idea I came up with is creating process which runs for one millisecond and putting (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | Re: LCD Panel Substitute
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Bill Conroy wrote: I am having an extremely difficult time finding a source for the Hitachi 16x2 LCD panel. I am wondering what an appropriate substitute would be. I am looking at the following part from page 53 of the Mouser Electronics Purchasing (...) (28 years ago, 17-Mar-97, to lugnet.robotics.handyboard)
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| | RE: Newbie
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I suppose that if you got the HB and write in this mail list you know the HB web. Just in case get http: //el.www.media.mit.e...ndy-board. There you have the a complete guide that how assembly, check, etc.. is a file in Acrobat PDF format with more (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | RE: Ascii to integer...
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When I make programs with IC manipulating chars or char arrays, I have used pointers and after I get the memory addresses as reference. In your case you can get the address of the char with & and the content with peek and after subtract till the (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | RE: ztx614
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Hi this is Rick Hormigo from Southern Mississippi University, and I'm new in this list and this is my answer for the question about ZTX614. I'm foreigner, so I'm sorry for my English !!! The only one very famous darlinton for medium power that I (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | Re: sonar help..
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|
There is an OEM kit which includes 2 ranging units and an instrument grade sonar transducer. Instrument grade meaning no protective enclosure. This kit has an order no. 606783 Just phone Polaroid Customer Service at 800 225 1618 and I'm sure they'll (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | Re: sonar help..
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Sriram, It looks as though the diagram you have is correct. I should warn you that I have a sonar board in which the cable was put on backward by Polaroid manufacturing. There is a manual that you should have for the ranging unit. In the manual (pg (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | Re: sonar help..
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where can i purchase a soner unit everyone talks about or is anyone done with thiers and would like to sell it please e-mail me with info. thank you in advance bryan wiabel offrds2@aol.com (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | music?
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Hi, unlike most handyboard subscribers, I am not using the handyboard for robotics, but for music: my HB is an interface between gesture sensors a macintosh based multimedia system running Opcode Max and Macromedia Director with MIDI equipment and (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | system time
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When I try to use the system time as part of an expression in an if-else statement I get an error message while trying to download to the board.Goes something like : type <float> cannot be used in a conditional Is there any way of getting system (...) (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | Handy Board Cost
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Is the $290 for an assembled board from Gleasons a reasonable price. Just want to make sure that I havent overlooked any better deals. (28 years ago, 16-Mar-97, to lugnet.robotics.handyboard)
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| | sonar help..
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(...) Hi everyone, Iam having some problems connecting my polaroid sonar to the handyboard. Any help will be greatly appreciated. According to the application notes (from polaroid) i've connected the flexible cable to the J1 connector as illustrated (...) (28 years ago, 15-Mar-97, to lugnet.robotics.handyboard)
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| | Never Mind!
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Sorry, ignore my last message about the over-voltage problem I was having. The reading was caused by a low battery in my multimeter. Oops! :) (...) everything >seems to check out. Help! (28 years ago, 15-Mar-97, to lugnet.robotics.handyboard)
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| | Handy Board Assembly Problem
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Hi! Thanks all for your input on the HB, puchased one and have started to assemble it, but have run into a problem. On the first step, the measured voltage across C14 is 5.8V. I've run through the debug steps and everything seems to check out. Help! (28 years ago, 15-Mar-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hello, All! Long time listener, first time caller. Hello. Does anyone hve any info. on how to control the direction of a motor while having it seperated from the H.B. by an optoisolator? (the motors run at 3.0- volts) I figured out how-to, if I use (...) (28 years ago, 15-Mar-97, to lugnet.robotics.handyboard)
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| | Newbie
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Hey all! I just got my handyboard in the mail today, and am ready to start playing! Can any of you tell me if there is a reference somewhere that explains how to get started (ie sample programs)? Thanx Charlie (28 years ago, 15-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard Serial Communications
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After parsing the Handyboard mail archive, it sounds like what I need is the SPI port. Unless someone has other advice, I'll research this path. At this point, my overall plans are to construct my 'Bot as follows: 1. Use the Handyboard for motor (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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(...) No problem at all. You connect two boards to the same serial line and there is a jumper on the SSC which configures it for either servos 0-7 or servos 8-15. When you send a command to set servo 15 to position 87 it "does the right thing". The (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board serial routines
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(...) /* ---...--- SENDING AND RECEIVING THROUGH THE SERIAL LINE ---...--- the IC program must be stopped in order for this to work ! the code is from the handybaord FAQ by Fred Martin or ?? Randy Sargent ?? added by Xavier Chabot, 3-3-97: (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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Greetings, The serial port could be used after downloading the program code into memory for other purposes (such as controlling the mini-ssc board). However, I have not found any reference to RS-232C port IC commands, so one would have to build (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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I would love to be able to use serial controlled boards with the Handyboard. Given that it only has one serial port which is used for programming, won't this be a problem? (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board and 6 legged bots.
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Scott Edwards makes a nice board called the mini-ssc which takes a serial RS232 signal and drives 8 servos. You can chain two of these for the capability of driving 16 servos. I've used one and it works quite well and is very small and light. Cost (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Handy Board and 6 legged bots.
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I understand the handy board has motor drivers for wheeled applications, but what about 6 legged robots. These use 12 PWM servos. How can the handy board be used to control a 6 legged critter? (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Mailing List
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Please subscribe me. Thanks. (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Newbie
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Hello! I am a high school senior working on a project for Tech Challenge '97 here in San Jose, California, and my team has decided to use the Handy Board as our processing/control device. I have a few questions With a basic HB, could we run (2) (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) Resistors in series with LEDs are generally current limiters, meaning that the LED is very low resistance when conducting, so the resistor is the determinant of current flow. With the little colored LEDs I teach my students to hook up a 1K pot (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Servos
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I have tried to use my servo with the HB, but the icb that I have does not reflect the documentation in given in the HB manual that I have. There is reference made to servo_on() and servo_deg() which is not in the icb file that I have of the servo. (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Ascii to integer...
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Is there any function to convert Ascii to integer on the Handyboard? Yours Jon ---...--- Web : (URL) : (URL) jonko@gyda.hiof.no ---...--- (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | High amperage charge
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I have read in the HB Manual that people have experienced difficulty when useing high amperage transformers to charge the HB.I am interested in chargeing the HB with a 12 volt automotive circuit.Is this possible. Yours sincerely Joe Martin (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Flame detection
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What are some common methods people use to detect candle flames in a room filled with flourecent and/or halogen lights? THat is, what does one use to differentiate between ambient and flame lights??? Sincerely, Yoni Garbourg << To succeed, Atificial (...) (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | ds1233-10
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I have had trouble finding this part(DS1233-10). Does anyone know the properties of this part or an acceptable replacement? Jim Hamilton (28 years ago, 13-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) My question is...in the first diagram (below) the resistance is 220 ohm ie 0.2KOhm But in the second diagram the resistances are 2.2KOhm Which is the correct one? ---...--- (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | Re: 100 sensors
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(...) A resistor ladder is simply several resistors, connected in series with a switch between each one. On the handyboard you would do something like this: VCC ---\/\/\/---\/\/\/--.../---...--- | | | | | | \ SW1 \ SW2 \ SW3 \ SW4 \ SW5 | \ \ \ \ \ (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Spike protection
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Terry, If you have the L293D or the SN754410 motor driver chips, then the diodes are present. - Prabal (...) (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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| | ztx614
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Digikey is out of stock of the ztx614 transistor. Can anyone tell me another supplier for this transistor? Can I substitute a different transistor? If so, which one(s) would work? Thanks! .... Jim Montague (28 years ago, 12-Mar-97, to lugnet.robotics.handyboard)
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