DC 5V 12V SG3525 PWM Controller Module 100HZ-100KHZ Adjustable Frequency Control Board Diy Electronic

?Specification:1. onboard SG3525A PWM control chip2. on-board 78M05 regulator chip, providing a reliable reference voltage3. onboard two precision adjustable resistors, R3 controls the duty cycle, R4 control frequency4. on-board power indicator5. the working voltage: 8 ~ 12V6. Frequency Range? 100HZ-100KHZ adjustable7. Duty Cycle :0 - 100% adjustable8. voltage : 5v9. board size: 30.8 (mm) x18 (mm)Package Included:1 x? DC 5V 12V SG3525 PWM Controller Module 100HZ-100KHZ Adjustable Frequency?? ? ? ? ? ?