Electronic – Motor with two endstops using limit switches

I have a circuit where two limit-switches to be wired with motors to do the following functionality. It is to be used in a remotely placed device so that the intervention of microcontroller on the working of the motor should be minimized.

The circuit shall perform the following operation

• When the supply is positive the motor should rotate CW. After reaching the limit switch, the motor is to be disconnected from the supply. Afterwards, by using a trigger (maybe reversing the supply, for example) the motor should rotate counterclockwise to reach the other limit switch. After reaching the switch, the motor should be disconnected from the supply again. By keeping the motor in this position and if we again give another trigger, the motor should rotate clockwise again.

In short, the motor should rotate to and fro. The limit switches should disconnect the motor when the knob reaches the limit switches. A trigger should be there to make the disconnected circuit live again.

The circuit is to be used in mostly damped areas place. The motor is actually closing a water connection valve. It can be easily done by using some microcontrollers. But if the microcontroller or any of the small components like we may use as switches(diode, MOSFETs etc..) fails, it may result in utter loss of water.

The motor has a maximum rating of 3.6VDC. And the supply is a 3.3V Li-ion Battery.