555 time relay circuit

Published:2011/6/20 8:46:00 Author:TaoXi | Keyword: 555, time relay | From:SeekIC

This circuit is composed of the +12V voltage stabilization circuit, the 555 monostable circuit and the relay control circuit, when the power is connected, pin-2 has the low level, the 555 sets, the relay J2 will not act, when the voltage of C2 is charged to 2VDD/3, the pin-3 has the low level, the J2 closes to connect the contact points J2-1 and J2-2. The NC contact point J1 of the relay J1 will cut off after the circuit got the power. This circuit can replace the JSJ1 transistor time relay. The timing parameters are as shown:



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