3pcs SG3525 PWM Controller Module Adjustable Frequency 100-400kHz 8V-12V

Feature: ? Onboard SG3525A PWM control chip On-board 78M05 regulator chip, providing a reliable reference voltage Onboard two precision adjustable resistors, R3 controls the duty cycle, R4 control frequency On-board power indicator The working voltage: 8 ~ 12V Board size: 30.8 (mm) x18 (mm) ? Package included: ? 3 x SG3525 PWM Controller Module