 | | Robotics club in the Los Angeles area.
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Does anybody know of a club in the Greater LA area. The only one I've found so far is over an hours drive away. Any info would be helpful. Thanks Mike (27 years ago, 30-Nov-97, to lugnet.robotics.handyboard)
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| | IC problem
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Hi guys, I know that this exact question came up once before in this newsgroup, but its reply has long since gone to the bit bucket in the sky, so forgive me. Anyway, I can get the following message on my handy-board: Interactive C V 2.81 9/28/93 (...) (27 years ago, 29-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Smoking serial/charger board...!!!
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I am having a similar problem (see notes below) - R11 is burning on the serial/charger board. My HB had been on the shelf for a month or so, and it may have been left on AND I had made the motor-power hack (I tapped the center of the battery pack to (...) (27 years ago, 28-Nov-97, to lugnet.robotics.handyboard)
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| | LCD Connector?
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Hello to ALL, I was wondering if the LCD connector could be used to connect a speech board from RC Systems. Could I unplug the LCD module and use the plug ins for the board w/ an additional power source for the board? Thanks, Randy Eaton (...) (27 years ago, 28-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Replacement for ZTX614 NPN Darlington Transistor
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(...) I am currently arranging a supply of the ZTX614, when they are available I will post the price to the list, hopefully early next week. I also supply the Handyboard in the UK at £19-50 for the set (main board and charger/if) including first (...) (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | The frequency of a digital input...
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Hello all, What is the maximal frequency that we can put on an digital input of HB? French Studant... By, and thanl you... (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Handy Board PWM Routines
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(...) <snip> LDAA speeda ; rotate bits in motor speed ASLA ;Rotate the speed bitmask one bit position. BCC SPDoffA ;Did we set the carry flag by shifting a "1" out ; of the MSB of the register? ADDA #1 ;We pushed a "1" out of the register, better ; (...) (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | HB sonar new drivers
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the new code is improved in the sense that 1. there is a clear schematic and wiring diagram; 2. it does not require the removal of a motor driver chip; 3. all driver code is written in Interactive C. fred (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | Handy Board PWM Routines
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I've recently been implementing a PD controller on the HB for use in a line following robot, and have been having some problems with instability, especially around the zero point. I was beginning to suspect that the 8 levels of PWM in the HB library (...) (27 years ago, 27-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Polaroid 6500 stuff
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What was wrong with the old drivers? ---...--- 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 ---...--- (...) (27 years ago, 26-Nov-97, to lugnet.robotics.handyboard)
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| | 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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