I thought of this very simple and basic circuit that everyone has used at some point. The two switches N/O upper limit and N/C lower limit switches (simulate) water level float switches. I needed the circuit to control a motor (lamp simulates a motor) to sump water from an aquifer hole in my yard. The top N/O switch monitor the high water level and when that switch closes it will latch the two relay coils and turn on the light (motor simulation) and the light will stay on until the lower N/C switch monitors the lower water levels switch opens to unlatch the relay coils and turn off the light ,or stop the motor,. My circuit works on 12 volt dc at a very low current.
