I need an electronic device (circuit) that will act as a DPDT switch to run a 20ma 12vdc motor forward and reverse. The trigger to activate is a + 2vdc pulse to activate the motor in one direction and when signal is removed the motor runs the other direction. I do not want to use a standard DPDT mechanical switch or relay. Can anyone help me please.

Thank you, Ron

 

The circuit you need is called an H-bridge.
You can buy it ready made as L298N motor driver.

 

A SPDT center off toggle switch can control a motor driver like this one. The toggle switch is only switching a few mA, the module controls power to the motor.

 

Any H-bridge MOSFET will fulfill your purpose. You can choose from L293D, L298N, IBT-4 etc. depending on the specifications of your motor.

 

As an aside, that L297N board is sold by quite a few vendors where it always claims good for steppers, but the unit fails to include the neccesary current control ability needed for a stepper.
So good for DC motor only. !

Note: the L298N IC itself does however have the feature, just not facilitated on these boards.

 

The trigger to activate is a + 2vdc pulse to activate the motor in one direction and when signal is removed the motor runs the other direction.

Don't you also want an 'off' function?