Control circuit for stepping motor - has three resistors in star connection and transistor switches with bases connected to control signal input

摘要

The control circuit has three resisters connected in a star arrangement. One point of the star is connected to a first supply potential, another point to electronic switches and the third point to further electronic switches, i.e. transistors. Each transistor is connected by its base to a control signal input and by its collector to a specified part of the circuit. The transistor switches are operated in a given sequence. The resistors may have the same value. The advantage lies in current control.