The Water Level Indicator includes a simple mechanism which helps to detect and indicate the water level in an overhead tank or any other water container.The sensing is done by using a set of nine ...
D1 is the voltage reference zener. Tied to this is a string of divider resistors (R2-6) that set the various fixed voltage levels. R7 & 8 form a voltage divider to that divides the battery voltage by ...
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