H-Bridge Motor Driver

DIY ElectronicsDIY Electronics wrote 11/11/2020 at 23:06 • 2 min read • Like

This article is about a H-Bridge motor driver.

A simpler circuit is shown here:

You can see my device working in this video:

Step 1: Design the Circuit

I drawn the circuit in PSpice simulation software student edition:

The diodes are used to protect the bipolar junction transistors (BJTs). 

Step 2: Simulations

PSpice simulations show that the maximum current is very high:

The output current is over 222 mA.

Step 3: Make the Circuit

I made the circuit with the use of the soldering iron by twisting the legs of the components with pliers:

Heat sink calculations are shown here:

Step 4: Encasement

I used a parcel box, blue tack and masking tape. Blue tack was used to attach the matrix board and transistors the inside of the box.

Step 5: Testing

My circuit allows speed control and direction control of the motor.