Time relay circuit diagram 3

Published:2011/5/21 0:24:00 Author:Lucas | Keyword: Time relay | From:SeekIC

The relay circuit is composed of the regulator filter circuit, delay charging and discharging circuit and relay control circuit, the circuit is shown as the chart. Regulating filter circuit consists of resistor R8, zener diode VS and filter capacitor C6. Delay charging and discharging circuit consists of resistors R1 ~ R5, capacitors RP1 and RP2, transistor V1, capacitors Cl ~ C3, diodes VD1 ~ VD3 and single-junction transistor VU. Relay control circuit consists of resistors R6 and R7, capacitors C4 and C5, diodes VD4 and VD5, voltage regulator diodes VS2 and VS3, transistor V2, light-emitting diode VL and relay K. R1 ~ R6 select 1/4W metal film resistors; R7 uses 2W wirewound resistor; R8 selects 1/2W metal film resistor. RP1 uses multi-turn wirewound potentiometer; RP2 uses organic, solid potentiometer.



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