Five simple yet effective electronic toggle flip flop switch circuits can be built around the IC 4017, IC 4093, and IC 4013. We will see how these can be implemented forswitching a relay alternately ON OFFby alternately pressing a single push-button or through touch pads, which in turn will...
You can change the password sequence by appropriate wiring to the CLK pins of each flip flop units. The VDD(power) and VSS(ground) pins of the IC was omitted for simplification of the schematic. Sometimes the IC 4013 may not start with high state on start up, in that case add a power...