Subject:
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Re: dc motor output control? Please help!
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 25 Dec 1998 13:51:21 GMT
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Original-From:
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Fred G. Martin <fredm@media./NoSpam/mit.edu>
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Viewed:
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1177 times
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the short answer is that you can't use 3v motors with the handy
board. the FAQ states this:
http://el.www.media.mit.edu/projects/handy-board/faq/index.html#compatiblemotors
if you use the "separate motor power supply" hack, with a 6v battery,
you might be able to get 3v motors to work. see
http://el.www.media.mit.edu/projects/handy-board/faq/index.html#mpwrplug
fred
In your message you said:
> hi everyone,
>
> i need some help on controling the output voltage of the dc motor ports. the
> o/p of the motor port is 12V. but my motor required voltage is only 3V.
>
> i like to know if there is any way to clamp down
> the voltage to 5V or lesser.
>
> i try using a enternal resistor of 8 ohms 5 watts to reduced the voltage
> across the motor and also write a sample program to on the motor for 1 sec.
> but the motor is always stalled. the HB will be in the reset mode causing
> the motor port to be on continuously. however after toggling the on/off
> switch for about 5 times, there are 2 kinds of situation forming up.
>
> situation 1:
> the o/p of the port is very unstable. it on/off for 1 to 2 time then allow
> HB to end the sample program i write.
>
> situation 2:
> motor port 0: green led on
> motor port 1: red led on
> motor port 2: red led on
> motor port 3: red led on
> the HB is in the reset mode again.
>
> please help!!!
>
> Thanks
>
> Michael
>
>
>
>
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Message is in Reply To:
 | | dc motor output control? Please help!
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| hi everyone, i need some help on controling the output voltage of the dc motor ports. the o/p of the motor port is 12V. but my motor required voltage is only 3V. i like to know if there is any way to clamp down the voltage to 5V or lesser. i try (...) (26 years ago, 25-Dec-98, to lugnet.robotics.handyboard)
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