How to make touch switch using 2n2222

How to make touch switch using 2n2222

In this project we learn How to make touch switch using 2n2222 npn transistor easy at home easy step with circuit diagram.

How to make touch switch using 2n2222

in this project we use only one NPN transistor. for making this project we need some components. 

Components: 

touch switch components

• 2n2222 NPN Transistor (1)
• 220ohm Resistor (1)
• LED (1)
• 9V Battery
• Battery clip
• PCB Board
• Soldering wire
• Soldering iron

Circuit Diagram:

In this project we use single transistor 2n2222. and make it very easy circuit.

2n2222 NPN Transistor has 3 pin. If plain side in front then 1st pin is emitter pin. 2nd or middle pin is base and last or 3rd pin is collector pin. In this project we use base pin and positive wire use for touch point. Emitter point use for negative power. And collector use for LED. We connect one resistor 220ohm for led safety. Here you can connect any other output components like buzzer or so on.

When we touch hand on touch point then LED on. And when we remove hand then LED off.  It’s very simple homemade project with few steps.

we learn it more batter using video.

Video of How to make touch switch using 2n2222: