My girlfriend bought an LED faucet that is actuated when you turn the water on and is powered by a battery pack of 4 AA batteries (2 wire out).
However, when the water is turned off, the slope of the faucet is rarely sufficient to overcome the surface tension and the faucet remains on. How can I build a timeout circuit such that the faucet turns off after being lit for 5-10 minutes and stays off unless water is fully cleared from the faucet and then the faucet is turned on again?
A friend of mine recommended a 555 chip, but after looking into it it seem the faucet would just turn off after 5 min, then turn back on 5 min later and keep cycling indefinitely.
I tried searching this site and came across this question that seem similar, but can't figure out how to deal with the fact that the activation of the circuit would work more like a toggle switch than a push button.