Pressure regulation and timing amphibious controller circuit

Published:2011/5/19 1:01:00 Author:TaoXi | Keyword: Pressure regulation, timing, amphibious controller | From:SeekIC

When the pressure regulation, timing selecting switch S2 is at the position 1, the timing control circuit is composed of the NE555, S, C3, RP2 and VS.etc. When using, you press AN, C3 will rapidly discharge through R2 and AN, at this time, pin-2 and pin-6 of the NE555 has the high level voltage, pin-3 outputs the low level voltage, the bidirectional thyristor VS conducts and the output socket CZ outputs the voltage. The DC current charges C3 through RP2 and R3, after C3 is fully charged, the voltage of NE555's pin-2 and pin-6 reduces to 1/3 of the dc power supply voltage. At this time, the NE555 resets and the pin-3 outputs the high level voltage, VS cuts off, CZ has no output voltage.



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