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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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