uses PIC16F84 to control 20 watt 12V DC halogen lamp
http://www.geocities.com/sunsetstrip/concert/2301/dimmer.html
http://www.uoguelph.ca/~antoon/circ/lantern.htm
Simple 4 channel 110V a.c. dimmer circuit that can be controlled with 0 - 10 VDC.
http://home.att.net/~northlightsystems/applications.htm
Want to control your room lighting using your computer? Then buy some triacs and opto couplers, build this gadget and plug it into your PC parallel port and voila!
http://www.raphnet.net/electronique/triac_lights/triac_lights_en.php
This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Please note that this circuit cannot be used with fluorescent lights.
http://www.aaroncake.net/circuits/dimmer.htm
To find out how a triac can vary the brightness of a light see Sound to Light.
http://www.saburchill.com/tech/electronics/elect041.html
This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Please note that this circuit cannot be used with fluorescent lights.
http://www.uco.es/~p62fugoj/dimmer.htm
This circuit can control the electric power with the one variable resistor.
http://www.hobby-elec.org/e_ckt24.htm