Re: Timer

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Matthew Smith by way of Terry Fritz <twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>

Hi Ed, All

Those treasure troves called Microwave Ovens may be worth a look;  the 
old electromechanical timers probably wouldn't be that suitable (poor 
resolution, relatively low current microswitch), but the electronic 
timers may be.  I don't know the how much current they switch in 120V 
land, but the ones I've got in the shed have relays which go up to about 
7.5A -at- 240V.  Some can even be programmed to come on at a set time plus 
you also have a duty cycle control ;-)  You could always swap in your 
own relay in one of these or use the existing one to power a contactor.

Conventional oven clock/timers could also be considered, provided that 
the timers could be set to one minute (rather than five minute) 
resolution.  I'd imagine that these would have quite a hefty switching 
capacity.

Cheers

Matthew Smith

Tesla list wrote:

> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Esondrmn-at-aol-dot-com>
> 
> Does anyone know of a commercially made electronic timer?  I am looking
for a 
> timer that can be set for one to twenty minutes that would supply 120 volts 
> at maybe 10 amps for the set amount of time then shut off.
> 
> Thanks, Ed Sonderman