Thread: Making a forward only speed control reverse
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Unread 11-12-2003, 09:24
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Re: Making a forward only speed control reverse
A double pole double throw relay can easily change the the direct for you.

DPDT relays are essentially dual single pole double pole switches. I will use the following names for pins
C1 - Common for switch 1
NO1 - Normally open side of switch 1
NC1 - Normally closed side of switch 1
Similar names for switch 2.

C1 - motor lead
C2 - motor lead
NC1 - NO2 AND High voltage side of speed controller
NO1 - NC2 AND Ground side of speed controller

If you operate the speed controller with the relay energized, you will drive in one direction. If you de-energize the relay your motor will drive in the opposite direction.

Good luck.

Joe J.

Quote:
Originally Posted by sanddrag
Hey all you bright CDers.

I've got a challenge for you (actually it's more of a problem for myself). I need your help. I need to find out if there is any possible way to make a forward only speed control (where the power positive goes straight to the motor positive and the ground is what is being switched) into a forward and reverse speed control. I thought of putting a relay after it (before the motor) and using some fancy code. Would this work? Any other ideas?

Thanks