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Unread 20-12-2005, 01:49
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
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Re: Cheapest and easiest way to slow down a motor

Quote:
Originally Posted by sciguy125
I might get my head bitten off for suggesting this dreaded device again, but maybe you can use a 555. I'm pretty sure it will run on 12V. To make a 50% duty cycle oscillator, it would only take the 555, two resistors, and two capacitors. Then, you could just feed that into a MOSFET. The motor only has to go one direction right? If so, you'd just the single transistor, not an entire h-bridge. You won't have to deal with trying to dissipate as much heat as the resistor will be putting out.
You mean like this http://www.allelectronics.com/cgi-bi...cgi?item=MSC-6 Seems like a neat little thing that would actually be kind of fun to try out.

Not exactly cheap or easy, but it is kind of neat.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004

Last edited by sanddrag : 20-12-2005 at 01:55.