 | | Handyboard problems
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We've encountered a problem with our Handyboard that we hope the list may be able to help solve. It all started with the "Normal/Zap" switch on the charger board, which was somewhat loose. It wiggled whenever we changed the setting. After a couple (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | RE: Replacement for ZTX614 NPN Darlington Transistor
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I have looked in the Maplins Catalogue and they don't stock the 614, they stock others but not this particular one and I was wondering if anybody knew of a compatible version. Thanks for any help. John Hatton johnha@icsplc.co.uk (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | RE: IR Demodulator Range Finder Hack
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(...) Sure thing. The basic wiring for a 555 in astable mode is pretty straightforward; +5 volts |-----+ +-|-----|-+ +-Res.1-------| 8 4 | | | | |---...---| 7 3 |------> to Base of BJ Transistor Res. 2 | | | +----| 6 "555" | | | | | +--------+----| (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Sonar Adaption
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I am building a sonar ranging device and I want to add it to one of the digital inputs on the HandyBoard. How do you get the board to respond to the message given to it from the sonar? Adam Freedman adamfdp@aol.com (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500 stuff
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Oh yeah, I meant to send an e-mail: "There are new drivers and a wiring diagram for using the Polaroid 6500 sonar ranging module with the Handy Board!! Just visit the HB home page: (URL) -Fred" That said, the answer to this question is simply, get (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | Polaroid 6500 stuff
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We're planning to use the new Polaroid 6500 stuff on the Handyboard web page. We intend to use a six volt power source to drive our motors independently of the power source to the Handyboard itself (by cutting the appropriate trace on the board). (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | moving
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i know you've told us a thousand times who to send requests like this to, but i'm a looser who suffers from chronic "outlook is a piece of doggy doo" syndrome... i am moving from coreyfro@deepwell.com to coreyfro@cwws.net and would like to retain (...) (27 years ago, 25-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator Range Finder Hack
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Try RADIO SHACK. They stock a pocket book range by Forest Mims. One of these is specifically on playing with the 555 timer IC Regards Terry Howsham (27 years ago, 25-Nov-97, to lugnet.robotics.handyboard)
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| | RE: IR Demodulator Range Finder Hack
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Thanks to David Kott for the addresses, the pdf file is a slightly updated version of the original so it will come in useful. He mentioned that he was using a circuit to modulate the IR transmission from the LEDs by using a NE555 to trigger a (...) (27 years ago, 25-Nov-97, to lugnet.robotics.handyboard)
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| | Replacement for ZTX614 NPN Darlington Transistor
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I am writing to see if anybody knows of a suitable replacement for the ZTX614 transistor driving the IR transmittion circuit. I can't find any easily available in the UK and was wondering if there are any other NPN Darlington transistors that can (...) (27 years ago, 24-Nov-97, to lugnet.robotics.handyboard)
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| | UK SUPPLIERS OF PCBSDate: Sun, 23 Nov 1997 10:25:00 GMT
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Hi Bill, and once more many many apologies for taking so long to reply to your messages.. BB> Are the PCBs still available ? Sorry its been so long, I've been BB> running around like a mad thing the last couple of weeks ! Know the feeling! I'm (...) (27 years ago, 24-Nov-97, to lugnet.robotics.handyboard)
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| | Steppers
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I am trying to use stepper motors in the handy board, but I can't find any directions on the web site. I thought I saw it somewhere once, but I can't remember where. Please direct me to the information, or if it doesn't exist on the page, HELP!!! (...) (27 years ago, 24-Nov-97, to lugnet.robotics.handyboard)
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| | Re: External motor power
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(...) Yes, you have to cut the trace. See the FAQ for details: (URL) (27 years ago, 22-Nov-97, to lugnet.robotics.handyboard)
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| | External motor power
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I posted this question about a week ago but got no response. Since several other subscribers with the same question have asked me if I got an answer I figured I ought to post it again. I want to use an external battery for motor power. I see the (...) (27 years ago, 22-Nov-97, to lugnet.robotics.handyboard)
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| | How to know my position??
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Hello We are French Students and we are looking for a system to give the robot, which contains the Handy Board card, his position on a table (2*3m). Could you send us any information about this? Thank You... En français: Salut, Nous sommes des (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | Sorry.
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Whoops, I got so many auto-replies 'mail not delivered', I thought I mistyped the adress or something, so I decided to re-send it. After sending, I found out that it had come-through after all. Sorry, I'll pay better attention next time. (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | Re: OH YES It's Trigonometry
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I hereby send the formula for calculating the asin and acos. They're included a a GIF file, of which I'm sure you can view. I hope they'll be helpfull to you. Jeroen vd. Vegt PS I suppose you already know that 'asin x' does NOT equal '(sin x)^-1', (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | LOOKING FOR THE EXPANSION BOARD
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1. Does anyone know a source of supply for a fabricated & tested Expansion Board? If it is not in production, does anyone have the source code for the PIC 16C84 that is on the Expansion Board? Thank you. (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | Re: looking for bridge rectifier
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looks like they changed the part no. to 'DB101DI-ND'. Fred In your message you said: (...) (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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| | looking for bridge rectifier
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HI, I'm looking for the bridge rectifier (D2) on the parts list. Digikey does not support the specified part number (DB101-ND). Can someone give me the voltage and current specs so I can find the correct part??? thanks in advance ron c (27 years ago, 21-Nov-97, to lugnet.robotics.handyboard)
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