Motor controller help wanted

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Article #11235

#11235

From: Jonas R Klein
Date: Sat, 07 Nov 1992 20:27

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1323 bytes

I need to control 18 motors from a computer.  What's the easiest
way to do this?  right now I'm planning to use four transistors for
each motor:
       
       +5V-----------------------
             |c          |
----     b |/            \|
LS  |------|  NPN         |---- LSTTL
TTL |      |\e
----         |           |
             |___Motor___|
             |c          |            
----     b |/            \|           
LS  |--vv--|  NPN         |-vv-- LSTTL 
TTL |      |\e           /|             
----         |           |            
          ___|___________|___GND


The motors are small, and I'm using 2n2222 style transistors form Radio
Shack, since they're cheap and easy to get, but I still need 72 of them
and a lot of wire.  Can I do this more easilly from a bipolar supply?
How does everyone alse do it? I haven't beena able to find many circuits
that do this.

Thanks,
+Jonas Klein
 jonas@world.std.com

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Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!sol.ctr.columbia.edu!eff!world!jonas

References: <kwRVTB1w165w@halcyon.com>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!sol.ctr.columbia.edu!eff!world!jonas
From: jonas@world.std.com (Jonas R Klein)
Subject: Motor controller help wanted
Message-ID: <BxD4uC.HwC@world.std.com>
Organization: The World Public Access UNIX, Brookline, MA
References: <kwRVTB1w165w@halcyon.com>
Date: Sat, 7 Nov 1992 20:27:48 GMT
Lines: 37

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