â€¢Power source: 12 VDC
â€¢Load voltage: 12 VDC, 1.5 A max.
â€¢Output: controlled DC motor by pulse width modulation
â€¢PCB dimensions: 1.76 x 1.32 inches
Integrated circuit oscillates the frequency at 264 Hz relative to resistors 1, 2, and 3, variable resistor 1 and capacitor 1.
VR1 provides adjustment of duty.
If the plus duty is more than the minus duty the motor will slow down.
Frequency will be transmitted through IC to resistor 4 and the base of transistor 1 making TR1 function as adjustment of VR1.