CD 4013 Toggle Switch- Design Trick 1

CD 4013 is a CMOS IC which can be used as a Toggle switch to On/Off a relay. It has two positive edge triggered D type Flip-Flops. When the clock input receives positive pulses, the output swings high/ low. In the circuit, the data input pin5 is connected to the Q output to use only one output in the toggle mode. Clock input can be from a 555 astable multivibrator or Crystal oscillator.

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