Forrest Cook

Introduction A pulse width modulator (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller. The circuit described here is for a general purpose device that can control DC...

Introduction DC powered LED lighting circuits can vary from trivial single LED/series resistor combos to simple analog current regulators to more complicated switching power supply circuits such as this project....

Introduction This circuit is for a solar powered white LED with automatic activation in the dark. It can be used for both indoor and outdoor night light applications. For indoor uses, if the circuit is operated near...

Introduction When connecting a solar panel to a rechargeable battery, it is usually necessary to use a charge controller circuit to prevent the battery from overcharging. Charge control can be performed with a number...