This circuit is from a 90s American documentation. The circuit can use complementary pairs according to the power. The power voltage can be between 5 and 12 V.
This simple circuit does not use active components and uses a small speaker as a microphone. The...
Any power MOSFET that supports the current of the controlled stepper motor can be used on this...
This circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...