Bidirectional tidal flow

[sphelps]

Originally Posted by golf nut

It's a count down timer, when the motor turns and a magnet effects the sensor the power triggers the timer to start counting down and turn the motor off, once time down has occurred power goes to the motor, it turns and when the next magnet is seen it repeats, you can time down anywhere from seconds to weeks depending on the timer used.

Ok I'm still missing something here. It must be more than just a count down timer. If this were the case the drum would rotate until the sensor is triggered and opens a circuit. The open circuit triggers the counter which turns off the motor. OK so far so good but then when the counter stops the sensor is still in the same position and therefore the circuit is still open which will reset the timer. This will continue forever and the drum will never move again. For this system to work that timer must have some kind of algorithm built in, which will either be a delay or something that over rides the sensor until the circuit closes again.

For the system to be reliable a simple a delay won't work. If it's an over ride that's a pretty cool little system. How much would the whole system cost, built and ready to go?