Water Level Controller and motor Protector v2
This is the v2 by using PIC16F877A with minimum components. The most left circuitry is the same as in mains monitor; used to check to variation in ac voltage (operating range is between 200v ac - 240v ac). Five pull-up resistor circuitry is used to measure the water level in the desired water tank. Note that the push buttons are used here is only for illustration purpose, basically they are representing the probes (6 probes made of 28 gauge wire; one is of ground (reference) level). The left most probe indicates 20% of water in tank, next indicates 40% and so on till 100% or full level. Note that these probes should be inserted in water tank after measuring the tank size; then divide it in five equal levels to correctly measure the water level. The SPDT switch is used to on/off motor. D0 LED is indicating the position of this switch means if the switch is on it will glow to remind you. Note that if the water level is full and the motor switch is in on state motor wil...