Nilometer circuit

Published:2011/4/26 22:12:00 Author:Nicole | Keyword: nilometer | From:SeekIC

This nilometer adopts two CMOS IC, the circuit is simple and easy to make. LED is as water level indicator, this water level indicator can be saw in dark, and it also set a full water annunciator. When there is no water in water tank, bronze hoop A-G and M in test rod open, LED is in lightly conducting; when there are full water, LED1~LED7 is lighted up one by one; when the last LED on, IC2b= 1 , the audio oscillator witch is composed of IC2c and IC2d starts to oscillate, it alarms by piezoelectric patches.



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