Delayed Off Light Switch

This the circuit delays light switch for AC line 220V Lamp. It can turn on -off lamp get with Sw OFF and SW ON. Besides can delay Off lamp get about 5 minute. By the circuit within use digital CMOS IC and Triac for control AC lamp replace Relay make this circuit has small-sized and good convenient have no something speak of Switch relay.

Rated for use with incadescent loads
This is an unusual design in that it uses plain metal gate CMOS logic instead of the usual PIC or a custom chip. The 22uF capacitor charges up during one half of the ac cycle, and supplies trigger current to the triac on both halves.
Link: http://www.members.shaw.ca/novotill/DelayedOffLightSwitch/index.htm

Power Supply   Switching Power Supply   DC to DC Converter   Inverter
Battery charger   Led flasher   Motor speed controller   LM317   IC 741
RF radiofrequency   Electronic control   Digital Circuit   Alarm home system
DC to DC converter step up voltage   Mini project   Temperature control
FM receiver   Dual power supply   Fluorescent lamp   Pic microcontroller
Led display   RF amplifier   FM transmitter   LM324   LM723   TL494
2N3055   LM338   SG3525   Li-ion battery charger   Pulse generator