John Waters wrote:
> I need a timer to turn on/off a small aquarium air pump, but cost is
> very sensitive while accuracy is not a problem, could anyone suggest me
> a cheap solution? it could be a circuit, an off-the-shelf product, or
> whatever method, as long as it is cheap! I need only one on/off
> interval - once every hour (just roughly will do), each time turn on
> for about 5 minutes. It would be perfect if the on/off interval can be
> swtichable to once every ten hours (again on for around 5 minutes) as
> well. If it is not possible to have such a long or switchable delay,
> just once on/off interval every hour will be ok.

Sounds like a perfect application for a 10F200.

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