The most common type of motor you might come across in hobbyist circles for low power applications is the 3V DC motor shown below. This kind of motor is optimized f… See more

This circuit is called H-bridge because the MOSFETs form the two vertical strokes and the motor forms the horizontal stroke of the alphabet ‘H’. It is the simple and elegant solution to … See more

Now that we’ve got the theory out of the way, it’s time to get our hands dirty and build an H-bridge motor driver. This circuit has enough power to drive medium sized motors up t… See more

1. The 555 Timer The timer is a simple 555 circuit that generates a duty cycle from around 10% to 90%. The frequency is set by R1, R2 and C2. High frequencies are preferred t… See more