Single button control on-off relay circuit 3

This circuit is similar to Figure 6-8
, except that the diode VDi half-wave rectification
and capacitor CI filtering are used to obtain a higher DC voltage
(about 300V), and a relay KA with a rated voltage of 110V is used
. A long interval is required between
    when the circuit turns off KA and when it turns on KA next time .
When the time reaches the charging time constant r of Cl , that is ,
t= r=R1C2-25×l03 If you want to shorten this time, you can reduce the resistance values ​​of Ra and Rz accordingly, and increase the power of Ri and Rz accordingly .