 | | Re: (BrainDead)
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Dear Jim, In your IC distribution, there should a file called servo.lis. Make sure you have it, and add the following line to lib_hb.lis: servo.lis The *.lis files are kind of like include files, and will cause IC to load any files listed in them. (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | unsubscribe
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unsubscribe (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | unscribe
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Please unscribe "tdk@utrillo.wustl.edu" from the mailing list. Thanks. (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | HB ni-cad battery pack
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I located a 9.6 volt 700 or 900 mah battery pack at Radio Shack and the one on the parts list is just 500 mah. My question is, will the charging circuit work ok with either of the above battery packs from Radio Shack? Thanks Bill Rose (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | power and servo
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Hi everyone, I've got two problems that I hope your combined expertise can solve. 1) I cut the trace connecting the the motors to the main board supply, so that I could power them independently (as per the instructions I found on the web). The board (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | step motor interface & control
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For anyone interested in using step motors: I have found a way to use them - Pull out the L293's chips, replace the y6 clk signal on the motor latch with y4, then pokes to 0x6fff will allow you to send bit patterns for 2 unipolar 5 or 6 wire (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: 100 sensors
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Joe, A very handy way to connect lots of digital switches is to arrange them in a resistor ladder and connect them into an analog input. You could get up to 8 switches into one input, giving you 256 different voltage levels, in theory, but in (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IR wall detection
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(...) Keith I think it works. I managed to get a bread boarded version of the IR sensor working. A 555 provides a 40khz carrier. The 555's reset pin is directly tied to pin 5 of a 567. The carrier is modulated by the internal freq of the 567. A (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | 100 sensors
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I am interested in sensing with about 100 water activated switches and am wondering if this is at all possible with the Handy Board.I had thought that it might be possible to by making them all return different levels of current at the sensor input (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: LM629 and "quadriture incremental" encoders
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James, That's probalby my post you read. I'm still working on hooking 'em up. I'm gonna use two 629's and two 18200 H-bridges. The 629 uses encoders simmilar to the ones in mobile robots. The quadrature encoder has two signals that are 90 degrees (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: IR wall detection
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Keith, Try an LM567. It's a tone decoder with PLL and VCO. Basically set the internal freq. of the 567 any where between .01 Hz up to I think 500 kHz. Feed a signal into the 567 and if the freq's match up, the 567's output goes low. I've been (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: dual servos
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There may be two separable issues in your experiment: 1. "twitching" when the control value isn't changing. this should not happen. 2. twitching because of flakiness in the pot reading. this would not surprise me at all. if the A to D reading on the (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: unsubscribe
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Please unsubscribe "vie100@psu.edu" from the mailing list. (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | RE: LM629 and "quadriture incremental" encoders
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The last time I priced these chips they were $249.00 each qty 1. (a bit expensive for my robots, but I've used them and they are cool) --Chuck ---...--- From: James Lewis[SMTP:jlewis@nomadics.com] Sent: Wednesday, January 15, 1997 5:10 PM To: (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | LM629 and "quadriture incremental" encoders
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I was reading through the mail archive last night and was struck by a message someone sent regarding the LM629 motor controller. It seems as though this is a really cool chip! I requested some samples and they are on the way. My question is this, I (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | dual servos
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Greetings all, I have been programming lately using the recently released dual servo routines. I have noticed that if I enable both servos and simply send each of them a pulse (servo_a7(or 5)_pulse=3040 for example) they respond faitfully but then (...) (28 years ago, 16-Jan-97, to lugnet.robotics.handyboard)
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| | Re: (BrainDead) servos
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Please see the Servo page, linked off of the Software Resources page: (URL) you load the drivers, and connect the servo to power, ground, and a control output. -Fred In your message you said: (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | Re: (BrainDead)
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(...) there 's one little mistake here.. you do not only need the servo.c file, but also the servo.icb file...So first you have to load the servo.icb file an then the servo.c file to get the thing working... Now you can use the servo commands as (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | (BrainDead)
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I'm kind of stuck, and hopefully someone can tell me what I'm doing wrong. My group and I have been working with the HB for a couple of weeks now and have progressed to the point (in programming the HB) where we've written programs utilizing muliple (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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| | (IR sensors)
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Can some give me a suggestion as to what kind of IR sensors would be good to use in conjunction with the Handboard on a mobile robot. I remember seeing some info on Sharp IR modules...and if I'm not mistaken, the posting mentioned that these IR (...) (28 years ago, 15-Jan-97, to lugnet.robotics.handyboard)
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