ES-32     PWM DC Light Bulb Dimmer / Motor Speed Controller
( DC  6 ~ 15V )

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This kit controls the brightness of light bulb or the speed of small dc motor by PWM (pulse-width-modulation). 
A two-transistor astable circuit generates a square wave with fixed frequency but changeable duty cycle.
The duty cycle determines load power and can be adjusted via the  potentiometer (VR).
For example: a 90% duty cycle means the load is nearly full power. 50% is half power,  etc. 

A Power MOSFET is used to drive the load.

Applications : 
DC motor speed control or light bulb brightness control


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