Liquid Level Controller (the 2nd)

Published:2011/8/12 4:52:00 Author:Felicity | Keyword: Liquid Level Controller | From:SeekIC

Work of the circuit The circuit consists of power circuit and level detection and control circuit. (It is showed in picture 8-100.) The power circuit consists of power transformer T, bridge rectifier UR and filter capacitor Cl, C2. Level detection and control circuit consists of level electrode AC, four NAND gate IC IC (Dl-D4), the transistor V, resistors Rl-R3, relay K and diode VD. 220V AC voltage is bucked by T ,rectified by UR and filtered by C1, C2. It then supplies 12V voltage to relay K and IC.



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