bidirectional motor control unit

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socram

Member - Posts: 1

Joined: May 07, 2007

Posted: May 08, 2007 at 12:12 PM / IP Logged

I need some help setting up my bidirectional motor control unit, so that I can make my dc motor rotate in either direction. I am using qbasic to control the motor and am using a power supply that is set to give out 12 volts. Any help is appreciated...

Big Dog

Gold - Posts: 1,265

This member consistently provides reliable information

Joined: May 02, 2002

Location: Quebec, Canada

Posted: May 08, 2007 at 12:28 PM / IP Logged

What you need is to look at is how the two relays inverse the motor direction. Basically both motor wires rest at ground but when one or the other relay is activated, that motor lead gets 12V positive.

Here's an idea (connect the motor leads where it says "to actuators"):

bidirectional motor control unit -- posted image.

Prepare your future. It wasn't the lack of stones that killed the stone age.

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: May 08, 2007 at 3:49 PM / IP Logged

You can also look in to using an H bridge, depending on how much current you motor is rated at. If it is a higher current motor it would be quicker and easier to go with the relay setup above. If it is a smaller motor the Hbridge configuration will take up less room in the car.

Kevin Pierson

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bidirectional motor control unit

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