This is a very simple touch light switch circuit that uses the 4011 IC, one transistor and a relay. The C1 capacitor stores the switching state at a certain time and is charged or discharged according ...

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 ...

If you can’t kill the electricity, the switch box might be connected to a cable from a different circuit. It’s not a common problem, but with old houses, anything’s possible.

The other requirements for the project were to use a microcontroller and to keep it simple. [Vadim] chose an ATtiny2313 to handle the RC-5 IR protocol and switch the light.

Simple Threshold Switch For An LED Indicator. ... could be used but I found no simple circuits. ... which is less than 0.5 mA but sufficient to light a high-brightness LED to an unacceptable ...

We frequently get home automation tips, many of which have simple circuit-based on/off control for lights. [Paulo Borges] has created something quite different, however, with his in-the-wall servo ...