eqbilly

i need to build a photo-switch to turn my security lights on when it's dark and i'm not at home. any circuit diagram to slove my problem is welcome.
Billy

Gene

Hi Billy. The circuit you want is basic BUT the components needed to handle the wattage of security lighting will probably run the parts cost way up. These devices are available as an add-on for security lighting for under $15 US - much cheaper than you could build one. Now, if you have lots of spare electronic parts on hand, that's another matter.

eqbilly

it is actually for the sake of practising electronics as well. if you have it please share with me

Billy

Gene

There are simpler circuits than this:

http://www.electronickits.com/kit/co...lec/ck1602.htm

but this one is available as a kit (if parts are not readily available) and would be great to learn from. You can find other circuits by doing a web search at "light dark activated circuit" You will need a small power supply to operate most circuits but it need not be large or expensive.

Be sure to calculate the current draw of the total lights you plan to attach and be sure the relay you select has contacts that can handle the power.

Good luck.

eqbilly

thank you genie for your quick response. i'll be giving you a feedback soon.
Billy