possibly a 555 timer and additonal circuitry to drive apower relay to handle 220vac loads.
2007-05-10 14:11:40 · 3 answers · asked by digicity299 2 in Science & Mathematics ➔ Engineering
first a two position selector switch for on and off.... then a red mushroom head, normally closed emergency stop button or buttons near what ever it is powering,if necessary..... then the timer.... then a relay... just make sure everything is rated properly for the voltage and amperage of the circuit.... grab an nec code book... what about your control circuit?.... gonna use 120v or a transformer to 24v?
2007-05-10 15:13:22 · answer #1 · answered by Mr. Ree 5 · 0⤊ 0⤋
A 555 would wirk fine and you could probably drive a fet or a relay like you mentioned. Added astable circuit site
http://en.wikipedia.org/wiki/555_timer_IC
http://www.doctronics.co.uk/555.htm#astable
2007-05-10 21:22:15 · answer #2 · answered by Gene 7 · 1⤊ 0⤋
Go to http://www.discovercircuits.com
2007-05-11 00:15:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋