PWM Solenoid and Valve Driver using DRV103

Rajkumar Sharma  
Project tested


Tiny module is a PWM Solenoids and Valves driver using Texas instrument’s DRV103 low-side DMOS power switch employing a pulse-width modulated (PWM) output. Its rugged design is optimized for driving electromechanical devices such as valves, solenoids, relays, actuators, motors and positioners. This board is also ideal for driving thermal devices such as heaters, coolers, lamps, PWM operation conserves power and reduces heat rise, resulting in higher reliability. In addition, adjustable PWM allows fine control of power delivered to the load. Output delay time and oscillator frequency are also externally adjustable.


  • Supply 8V to 32V DC
  • Load Capacity 1.5A
  • Trigger Input Voltage 1.5V to 5V DC
  • Thermal and Current Limit Shutdown
  • On Board Power LED


  • Solenoids
  • Valves,
  • Heaters, Coolers
  • Lamps
  • Relays
  • Power Contactor Coils
  • Hydraulics and Pneumatics Systems

Note: PWM Duty Cycle, Output Delay, Frequency Adjust

  • Oscillator Frequency range 500Hz to 100Khz, default set to 5Khz, Frequency can be alter by changing  R4 ( Refer  Data sheet for more details)
  • Delay Output: Default delay set to approx. 100mili seconds, Delay can be adjust by changing Capacitor C1
  • Duty Cycle is adjustable 10% to 95% , default set to 95% can be alter by changing R3 (Refer  Data sheet for more details)



Parts List






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