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PUMP CONTROL: "work in progress"
SPST by first relay is a pressure activated switch, it operates when pressure goes low, it energizes the first relay, this relay starts the timer and is in series with the second relay, the second relay is controlled by the timer, if the timer reaches the time limit it will stop the pump, the pump is represented by the lamp and resistor, the last counter is being used as a latch
The pressure switch goes on and off according to demand for water, if the pressure drops, the switch will turn on resetting the timer, and the relays turn on turning the pump on, as long as the demand for water keeps on going on and off the timer will not time out, but if the demand stays on for longer than allowed by the timer, the time will elapse and stop the pump.
The two relays are in series and power to the pump flows through the two relays.
Unless there is a leak in the system, the pressure should not drop, if the pressure drops then the pump will turn on and start the cycle again, if the pressure is reached then the switch opens and stops the pump, this is normal.
Note: For timer maybe I will use the frequency from the power supply instead of a 555.
Also this circuit is to complicated for what it does in some quarters.
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