 | | I think I fried my board!!
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I need help figuring out what I did to my handyboard. I had it all assembled, tested, and working when one of the battery leads touched one of the solder spots on the board. A small puff of smoke rose from the board but I was able to disconnect the (...) (28 years ago, 7-Jan-97, to lugnet.robotics.handyboard)
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| | HB - fast sensor reading
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Hello, I have a clock signal of 5 kHz and an analog signal. (There are in total 128 clock pulses) I need to read in the analog signal every time the clock signal is high. So I need to read the clock signal with at least 10 kHz. I tried this with IC, (...) (28 years ago, 6-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Rayovac Renewal batteries
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Renewals are pretty cool -- they are "true" alkaline in the sense that they have the same voltage, discharge curve, and shelf life. The only bugaboo with them -- and it's a big one -- is that each *cell* must be individually charged. so you can't (...) (28 years ago, 5-Jan-97, to lugnet.robotics.handyboard)
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| | Rayovac Renewal batteries
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Hi, I was wondering if anyone has any info on the Rayovac Renewal batteries. According to the packaging, they're rechargable alkaline batteries. Sinch alkaline lasts longer that NiCd batteries, I was wondering if it would be good to use these (...) (28 years ago, 5-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard Parts
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(...) The MC68HC11A1FN is available from BG MICRO. ( (URL) ) The 32K static ram is available from JDR. ( (URL) ) (28 years ago, 5-Jan-97, to lugnet.robotics.handyboard)
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| | Returned mail: Service unavailable
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----- Transcript of session follows ----- <<< HELO media.mit.edu <<< MAIL From:<brose@ipa.net> <<< RCPT To:<jwright@seattleu.edu> <<< DATA <<< QUIT mail: /var/spool/mail/jwright: cannot append mail: cannot open dead.letter 554 (...) (28 years ago, 4-Jan-97, to lugnet.robotics.handyboard)
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| | Handyboard Parts
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Well here I am again. I have gotten all my parts except the microprocessor (MC68HC11A1FN), the IR demodulator (IS1U60), and the 32K static CMOS RAM (62256-100LP). I have tried Jameco for the RAM but the Jameco part number 42833 doesn't seem to be (...) (28 years ago, 4-Jan-97, to lugnet.robotics.handyboard)
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| | Got V2X working...!
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Recently I posted a request for help in interfacing the 68HC11 to the Vector 2X, and through the help of readers of these groups, thank you very much, I was able to get it running. It was quite persnickety, with many possible modes of operation, so (...) (28 years ago, 4-Jan-97, to lugnet.robotics.handyboard)
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| | Re: pcode downloading
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(...) Yep, that checks out. (...) I get the correct voltages for the caps. And if the wrappers are on correctly they should all have the correct polarity. I ordered a replacement MAX232CPE (not the high speed "A" version). Hopefully this will either (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Coparison of Sensors
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(...) I agree. You should only have a semi-colon after a while if you dont want that while to loop through any instructions. A semi-colon after a while tells the compiler that all you want to do is continuously test the while condition until it (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Coparison of Sensors
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(...) Looks like you got too many semi-colons. Take out the semi-colons on all the while lines where you want the while to do the following thing. The process is getting to the "while(!start_button());" line and staying there. Also you have too many (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Config 0C / 0D
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Hi, I know this is an old chestnut but believe me I have searched the mail archive and nothing quite matches what I'm seeing. I have a handyboard which I made and which seems to work perfectly. However, I have to download (using hbdl) with the (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Re: pcode downloading
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(...) OK, well I think it is isolated at the pseudo-MAX232 chip. Did you get the +10 v power supply pin on the p-MAX ok? It's at pin 2. Measure it w/r/t ground and you should get +10v. Before you order a real Maxim, check the polarity of your (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Re: pcode downloading
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(...) : (...) I get -8.9v when its not jumped. When jumped I get some floating values in the mV range. I checked all of the solder joints. Changed power supplies. Removed and reseated the chip. Checked power and continuity at various points around (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Re: pcode downloading
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Here is the relevant part of the test instructions: Finally, the MAX232's ability to transmit data to the host computer is tested. Again using pin 7 of J9 as a ground reference, measure the voltage at pin 3 of J9. This is the MAX232's serial output. (...) (28 years ago, 3-Jan-97, to lugnet.robotics.handyboard)
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| | Coparison of Sensors
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Hi, I know this is probably a stupid question to you, but I wrote a program to compare sensors. But it doesn't seem to work. Can anyone help?? Here it is (28 years ago, 2-Jan-97, to lugnet.robotics.handyboard)
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| | Problem Downloading Pcode!!!!
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Hi, I'm really stuck. I got a facory fresh HB, instead of a Motorola it had a Toshiba C11W chip. When dowloading pcode_hb.s19 IC Win 95 says "CONFIG register required resetting. Please place in download mode again." Help, my scince project is due in (...) (28 years ago, 2-Jan-97, to lugnet.robotics.handyboard)
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| | pcode downloading
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Happy New Year! I'm putting together a HandyBoard and am stuck at the point where pcode_hd.s19 is downloaded. Some details: Have a chip labled SIPEX SP232ACP as a substitute(?) for MAX232. During downloading using DLM the board syncs OK but (...) (28 years ago, 2-Jan-97, to lugnet.robotics.handyboard)
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| | Re: Using RC cars for robot
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(...) We have successfully integrated a Traxxas RC car with the Handy Board. The vehicle uses a standard servo for steering and an electronic speed control (same behavior as a servo.) Since the HB can control 2 servos this works well. In this case (...) (28 years ago, 2-Jan-97, to lugnet.robotics.handyboard)
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| | interfacing to RC cars
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I haven't interfaced RC cars to a handyboard, but my experience might help anyway. (...) Tyco "Fast Traxx" and a look-alike made by Nikko. Both have dual treads (and therefore differential steering). Both are very fast. Unfortunately, both are (...) (28 years ago, 1-Jan-97, to lugnet.robotics.handyboard)
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