Electronic switch
Electronic
74HC00, 74HC02

We're now going to make of an interesting experiment electronic switch.

Turn power ON and press S1 just for a moment.

Then LED 1 stays ON and LED 2 and LED 3 stay OFF. This means that the electronic switch of LED 1 is ON.

You can observe the same performance by pressing S2 or S3. When any of these switches is pressed to turn ON any electronic switch, all other electronic switches are automatically turned OFF.

This electronic switch is made up of three sets of R-S flip-flop circuit. If you press any one switch and the corresponding electronic switch is turned ON, a reset signal is sent to all other electronic switches.

TV channel switches and stereo control switches are examples of this electronic switch.