555 large roller-type washing machine electric controller circuit

Published:2011/6/16 3:36:00 Author:TaoXi | Keyword: 555, large roller-type, washing machine, electric controller | From:SeekIC

As the figure 13-18 shows, the electric controller is composed of the pulse generator, the counter and the relay controller.etc, it has the same functions with the mechanical contact point type controller. The astable multivibrator is composed of the IC1 and R2, R1, C1, the oscillation period T=0.693(R1+R2)C1. IC2 uses the decimal counter / pulse distributor CD4017, it can be used as the output pulse clock of the IC1, and the ports Y0-Y9 continuously outputs the high level which has the same cycle with the count pulse respectively, the Y0, Y4, Y5 and Y9 successively control the VT1，VT2 and VT3, they start the J1，J2 and J3 to control the contactors 1C and 2C.



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