PWM Heater Driver

The project presented here is a high-current adjustable PWM (Pulse Width Modulation) source, designed to drive various loads such as PTC (Positive Temperature Coefficient) devices, DC motors, solenoids, high-power LEDs, and valves. The project consists of three main components: an SG3525 PWM generator, an MCP4015 MOSFET gate driver, and a MOSFET for load driving.

The key features of this project include adjustable PWM and frequency settings. A multiturn trimmer pot is provided for precise frequency and PWM adjustment, allowing for fine-tuning of the output signal. Screw terminals are included for easy connection of the load and power supply, and an onboard LED indicator provides visual confirmation of power presence.

The board can handle currents up to 3A, with a PWM duty cycle adjustment range of 0 to 100%. The frequency span is also adjustable, ranging from 500 Hz to 6.5 kHz. This makes the project suitable for a wide range of applications that require high-current PWM control.