Subject:
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Re: High current motors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 15 Apr 1996 21:33:06 GMT
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Original-From:
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Jeff Keyzer <JKEYZER@CALWEB.COMihatespam>
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Viewed:
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1809 times
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> The motor connector has three pins they are actually Motor A, V+,
> Motor B. Normally they are all at V+ when the motor is "off" (the
> motor is simply monitoring the difference between Motor A and
> Motor B. When you "turn on" the motor either Motor A or Motor B
> (depending on direction) goes to ground potential, and the motor
> sees the voltage difference and runs.
On the handy board, this is different, isn't it? I didn't think
that the center pin was V+... In fact, isn't it not a connection at all?
> Now connect the emitter of one 2N2907 to the base of Q1, connect
> the emitter of the 2907 to a 180 ohm resistor and then connect
> the resistor to the base input of Q4. Do the same thing with
Isn't this supposed to read, "Now connect the COLLECTOR of one
2N2907 to the base of Q1, connect the EMITTER of the 2907 to a 180 ohm
resistor..." The way it's written just doesn't seem right.
Also, would it be possible to create a similar circuit using
non-darlington transistors, such as TIP 31 or 41's and their PNP
counterparts? They are much more readily available to me!
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Message is in Reply To:
 | | Re: High current motors
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| I think the question on how to run higher current motors has got to be the most asked question here. Maybe we should add more info to the FAQ or something. Anyway, here is Chuck McManis' solution from a while back. I hate to send out something that (...) (28 years ago, 5-Apr-96, to lugnet.robotics.handyboard)
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