Can you give me a circuit that can turn off an on continuously .the interval can be adjusted from 15 to 30 mi

possibly a 555 timer and additonal circuitry to drive apower relay to handle 220vac loads.

Answer:
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?

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_i...

http://www.doctronics.co.uk/555.htm#asta...

Go to http://www.discovercircuits.com...

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Can you give me a circuit that can turn off an on continuously .the interval can be adjusted from 15 to 30 mi

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