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Timer to run for ever.Alec.. Thanks but my alarm sounds for one hour and i want three hour timer circuit so what modification will i have to do..
That's not cheap! I didn't notice one at that price. The cheapest one, which I drew to your attention, was just over £2 !! A pity you can't get such a thing locally in India.a cheap time switch which is £53.92 on the site which you gaven
I'd like to think so, but without knowing which alarm clocks and other components you'll be using and how it will be assembled who can tell?will it work properly and reliably for years
It's better if we keep this on the forum, so that others can chip in and point out any snags or make suggestions. That way we all learn.Please send your email id in private message
Try it and see for yourself! I would expect R4 (make this a 500k pot) to be at its minimum setting.But how much does we adjust to get 2hr
If your alarm clock beeps continuously for 1hr then you won't be able to use my suggested circuit for set times less than 2hrs (because the timer would be re-triggered after 1/2 hr).if I want 1hr , 2hr , 3hr, 4 hr... etc times