 | | Re: motor port problem .
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Philip I would first suspect that the motor chip has blown. This is eash to check since the Handy board has two L293 chips. Swap them (disconnect your motor connections) and run testmotors(). If the problem follows the chips, replace the bad one. (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: I overcharged my handyboard.
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Madhu: I would be very surprised that you overcharged the batteries to the point of no function. Your batteries would have to have gotten very hot for that time (batteries deteriorate in a charger due to evaporation of electrolite water). Generaly (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Re: motor port problem
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you may have blown one of your L293D chips. try swapping the two chips to see if the problem then migrates to motor 1. if it does, then you have blown an L293D. there is more info on debugging motor problems in the FAQ. See the answer to "One of the (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | RE: Which M68HC11 to use
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I am using the E1FN version myself without any problems (after getting through some problems during implementation). I believe that the F describes the type of package used (square version as needed on the 'standard' board). Ronald (...) (26 years ago, 17-Nov-98, to lugnet.robotics.handyboard)
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| | Which M68HC11 to use
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I am planning to build a HandyBoard, and am in the "Gathering Stage". I just recieved the docs from Motorola; the "HC11 Reference Manual", and the "MC68HC11A8 Programming Reference Guide". The Parts list for the HandyBoard calls out for the (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | I overcharged my handyboard.
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I think I overcharged my handyboard, I chargedf it for two days. I charged my handyboard using the Normal charge method. My handyboard is not responding at all. There is no power bulb glowing. Do you have any solution. I had to complete my project. (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | Please use subject headers on all mail
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thanks (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Request for Books on Robotics
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Mobile Robots: From Inspiration to Implementation by Joseph L. Jones, Anita M. Flynn; As its title suggests, this book convers everything you need to know to build a mobile robot. They discuss the design of their brain (a MC68HC11 design that looks (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | correct procedure when downloading pcode_hb.s19
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hi I am at present building a handyboard from Fred's assembly manual, however it appears I might have a problem. I have connected the serial interface board to the handyboard. The hb is placed into bootstrap mode by holding down the stop button. The (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | motor port problem
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hi, i really need help urgently. Currently, I running my robot using 2 DC motor on port 2 & 3. I used external power supply to the L293D (pin 8). I did not cut the trace. I used Alkaline battery 12V recharagable . when I run my robot, it is running (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi! all, I charged my handyboard for two days. Any problem iam going to get. Please respond me quickly as i had to do my project. thank u. Madhu (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | Broken Board (SPI??)
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Hi, I'm using the Polaroid 6500 ranging board with the sonar routines on the HB web site. When I call the sonar on one HB it returns -1 but when I try it on another HB it works fine. So it isn't the sensor. Could anyone tell me which conections on (...) (26 years ago, 16-Nov-98, to lugnet.robotics.handyboard)
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| | Request for Books on Robotics
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Could people please recomend some books about lego robots, using the handyboard or other controllers, or more general textbooks on the topic of educational robots? Thank you, Rachel Arens (26 years ago, 14-Nov-98, to lugnet.robotics.handyboard)
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| | Re: Monitoring household power consumption
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Hi all, I found an interesting article by Don Lancaster in May 1998 issue of the magazine, Electronics Now. Maxim makes a chip (MAX125) that will convert accurately four channels of analog data to 13 bits accuracy, plus talk about a device for $79 (...) (26 years ago, 14-Nov-98, to lugnet.robotics.handyboard)
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| | Re: NiCd Charger
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Russ: In a message dated 98-11-13 04:48:38 EST, you write: << ... power rating of resistor = 15Volts * 200mA = 3Watts Series resistor needed = 75 Ohms @ 3 Watts. ---...--- ------- The 75 Ohms bit seems reasonable to me but 3Watts must be way to (...) (26 years ago, 14-Nov-98, to lugnet.robotics.handyboard)
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| | Re:
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Hi everyone, The mistake you make in your calculation is that in your calculation you take the entire 15V for the resistor and this leaves no voltage for charging your NiCad. Do the same thing again and deduct your NiCad voltage from the 15V you (...) (26 years ago, 14-Nov-98, to lugnet.robotics.handyboard)
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| | FT639 and Lynxmotion IRPD
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Has anybody try to interface a FT639 to a Handy Board ? Has anybody try to interface a Lynxmotion IRPD kit to a Handy Board ? (26 years ago, 13-Nov-98, to lugnet.robotics.handyboard)
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| | Re: how to adapt a voltage signal?
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You could use resistors to make a 1/10 voltage divider. If you need high input impeadance, you could build an Op-Amp circuit to divide the voltage by 10. Most ADC chips have a pin that is the reference voltage for the high end of the scale--set this (...) (26 years ago, 13-Nov-98, to lugnet.robotics.handyboard)
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| | how to adapt a voltage signal?
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greetings to all i dont know if it has been asked before, but im trying to use son extra ADCs on my handyboard, trouble is they have a 0 to 5V range (analogue) but im trying to adapt the signals in the ranges of 0 to 50 volts, how do i make them (...) (26 years ago, 13-Nov-98, to lugnet.robotics.handyboard)
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| | Re: your mail
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(...) 3 Watts is correct. Look at the resistor on the HB charger board. It's pretty hefty too. -Scott (26 years ago, 13-Nov-98, to lugnet.robotics.handyboard)
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