12v dc motor speed control by pwm

how can i make a circuit for a door closing and opening by dc motor(12v).for speed control i want to use pwm circuit.but it rotate the motor in forward direction ,how can i reverse the motor

Posted by Anonymous on 14/11/2008, at 17:55 GMT

DC motor control

You may be interested in Teach-in article in EPEmag dating from Aug2004 at least for the direction control. On line magazine access at www.epemag.com.

Posted by Robert Neill (varient412@yahoo.co.uk) on 24/01/2010, at 17:01 GMT

12v dc motor speed control

You may be interested in the 3A Heavy Duty Motor Controller published by Electronics Today International as part of their 100 Circuit Suppliment back in October 1981.

Posted by Robert Neill (varient412@yahoo.co.uk) on 10/05/2010, at 10:11 GMT