Need Scematics for DC Motor Speed Control.

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Article #22360

#22360

From: Benjamin Isaac
Date: Thu, 22 Feb 1990 19:21

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I have had a lot of problems locating a decent schematic for a speed controler
for a cordless drill.
  
The type of schematics I am looking for is one that:
 
       1. DOESN'T use a transitor/resistor design (i.e. heat/excessive drain).
       2. doesnt require extremely hard to find components.
       3. can handle around 1amp at 6volts.
       4. will hopefully have some torque at lower speeds. 
 
I would appreciate any help through e-mail or through this newsgroup.

net: isaac-b@tahoe.unr.edu

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!tahoe!isaac-b
From: isaac-b@tahoe.unr.edu (Benjamin Isaac)
Newsgroups: sci.electronics
Subject: Need Scematics for DC Motor Speed Control.
Keywords: Speed Control
Message-ID: <3609@tahoe.unr.edu>
Date: 22 Feb 90 19:21:22 GMT
Distribution: usa
Organization: University of Nevada, Reno
Lines: 14