 | | Re: PCBS IN THE UK
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(...) Yes I am in the UK, full address detailed below. The price of my boards is £19-50 for the pair (Handyboard and Charger/IF) which includes first class recorded delivery postage to anywhere in UK or airmail to Europe and any other zone one (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Re: High current speed controllers
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Whoops, the url for my H-bridge design should be: (URL) previous version was missing the 'robotics' in the middle. Thanks to Mike for pointing that out. --Chuck (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Re: tracking an IR beacon
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If you want to get into _all_ the details of tracking you might see if the local library has a copy of "Tracking Multiple Targets with Examples from RADAR" published by ArTech House. This book is crammed with densely worded (and annotated with math) (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Re: High current speed controllers
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As for your question about controlling a motor with a PWM signal versus an analog level controlled by a power transistor, the issue is efficiency and power dissipation. If you use a power transistor to set the voltage at the motor, it will have to (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Re: High current speed controllers
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I designed a high-current H-bridge to use with my Handyboard (the specs are at (URL) heat sinks on the MOSFETs the bridge can control 50A. (You can substitute fets to get more power). The known problems with this design so far are that the power to (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | re: New Expansionboard
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It looks good to me, I would be interested. Bill James | work: 972.480.2306 Product Test Specialist | Pager: 972.597.6201 w-james2@ti.com Precision Analog & Interface Department Polymath in Training | Have Spacesuit will Travel ---...--- Original (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Recycled Sonar units
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Hello All, I have salvaged two modules from Polaroid cameras. My question is ... the pin outs on the control board for the "Spectra" has 17 straight in a line pin ins and the other module and board from a Autofocus 660 has 8 straight in a line pin (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Anyone using the motor powewr header J13 ????
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Hi all, for designing reasons I wonder if anyone is using the Motor Power Header J13. Would anyone be pleased if we added an extra power connector to our expansionboard to supply J13 with more power ??? Thanks..... Tom (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | New Expansionboard
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Hi all We at the TWI (School of engineering, www.twi.ch) in Switzerland are using the Handyboard for several projects. One of them is a model car with ultrasonic sensors and model servos. Because of some limitations of the Handyboard we have built a (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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| | Re: High current speed controllers
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Thomas, We are using the HB to control an AstroFligt 50A controller. The controller comes standard with a 20K pot to vary the PWM signal. What I did as substitute the 20K pot with a DallasSimi DS1803 pot. Its a 14 (I think) dip package that uses I2C (...) (27 years ago, 8-Dec-97, to lugnet.robotics.handyboard)
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