Low voltage DC motor speed control circuit

This low voltage DC motor speed control circuit is designed by using TDA 7274 IC, This TDA 7274 is a monolithic integrated circuit designed for DC motor speed control in crocassettes, radio cassettes and low voltage applications.



Circuit diagram

Low voltage DC motor speed control

Construction and Working

The motor is connected between pin 3 and pin 4 of IC TDA 7274, Resistors R1, R2 and VR1 is connected in series each other and then connected with pin 6, pin 8 of IC 7274, by varying VR1 we can control speed of DC motor.

Datasheet

You can get datasheet of IC TDA 7274 here

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