Automatic timers that turn lights and electric appliances on and off at predetermined times have become increasingly popular with the introduction of ”smart” models. With built-in microprocessors ...

Here is an ultra simple automatic light switch circuit for bedrooms. After construction, connect the input terminals of this circuit in parallel to the internal buzzer terminals of a Quartz-Alarm ...

Improved bike headlight switch circuit presented here has been designed to switch bike headlight on (or similar loads) at a presettable ambient light level. The circuit is based on the renowned timer ...