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H-Bridge Fundamentals

Design Considerations

When building the circuit, it is important to ensure that the wires you use, or the traces on the PCB, are the correct guage to handle the current required by the motors. You do not want to have the wires in your circuit to melt, causing a short circuit, or have a trace lift off a PCB, causing the circuit to become ineffective.

Try to keep the wires running from the circuit to the motors as short as possible, as this will be a source of RF noise. Also, twist the 2 wires together to help cut down on EM emissions.


There you have it, that is a basic guide to creating an h-bridge motor driver. If you have an questions, comments, or concerns, don’t hesitate to ask me.

A special thanks to all those who helped me with feedback while I was working on this article.


I am not liable for any damage that may be caused by using this circuit. Take care when building the circuit, so you do not make any mistakes that might lead to damage of the circuit, or personal injury. Safety first.

If you spot a mistake, please let me know!

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