The Valve Controller simplifies control of proportional solenoids by supplying a current proportional to an input control (current, voltage, PWM, frequency or digital signal). It accepts power supply voltages from 8 to 36 VDC. This linear solenoid driver utilizes high frequency switching output (PWM) to provide a DC current output. Maximum current output is up to 2.5 A. A current sensing circuit maintains output current regardless of changes in input voltage and coil resistance. The user can adjust maximum and minimum current. The setpoints are configurable using the smartphone application. Additionally, the controller includes a configurable dual LED which is visible from outside the housing. It has rugged packaging and performance for IP67, high vibration and off-highway machine environments. An M12 connection is provided.