Have you ever wandered the streets wondering, ‘Boy o boy! I wish I had more control over my life!’? Well! Wander no more and come into my parlour as I take you through the exciting world of power control. In this article, you’ll learn to take control of your life by designing a simple PWM control circuit that drives a MOSFET. Underlying this little circuit is a 555 timer. Adjust the frequency using the capacitors, add a variable resistor – and voila! Power control! I designed this controller for use with a simple hot wire foam cutter.