Automatic Sprinkler Controller (the 2nd)

Published:2011/8/6 21:14:00 Author:Felicity | Keyword: Automatic Sprinkler, Controller | From:SeekIC

Work of the circuit The circuit consists of power circuit, switching control circuit, astable oscillator circuit and control implementation circuit. (It is showed in picture 4-81.) Power circuit consists of power switch Sl, the power transformer T, to bridge rectifier UR and filter capacitor Cl. Switching control circuit consists of humidity sensors, sampling tubes Vl, composite amplifier tube V2, V3, power filtering tube and resistors Rl-R4. Astable oscillator circuit consists of Time-base integrated circuit lC and external RC components. Control implementation circuit consists of transistor V4, LED VL, VT, and manual control thyristor switch S2.



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