Subject:
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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 06:00:27 GMT
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Original-From:
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by way of Michael Toh <leahcim@pacific.net.sg> <michael toh <leahcim@pacific.net.sg>SPAMLESS>
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Viewed:
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989 times
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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 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 has 1 Reply:
 | | Re: dc motor output control? Please help!
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| the short answer is that you can't use 3v motors with the handy board. the FAQ states this: (URL) you use the "separate motor power supply" hack, with a 6v battery, you might be able to get 3v motors to work. see (URL) your message you said: (...) (26 years ago, 25-Dec-98, to lugnet.robotics.handyboard)
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