Global Specialties

Global Specialties DC Motor Speed Control

SKU: 32GSK804

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  • Regular price $10.95


This circuit allows the user to vary the speed of a DC motor from a stop position to maximum revolutions per motor specification.

Technical Specifications:

•Power source: 12 VDC

•Load voltage: 12 VDC, 1.5 A max.

•Output: controlled DC motor by pulse width modulation

•PCB dimensions: 1.76 x 1.32 inches

Operating Principles:

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.