Touch Switch

A simple touch switch can be created by using two NPN transistors.

Breadboard View

Use two NPN transistors, an LED and three 1KOhm resistors. Be sure to make the connections exactly as shown in the screen-shot. When touching the two blue cables, the LED will turn on. (see attached Arduino code).

By omer
Created on June 17, 2009, 12:59

Category: Analog

Difficulty: kids

License:  Creative Commons Attribution-Share Alike 3.0 Unported License

Tags: analog input, touch, switch

Images

Breadboard View Schematic View PCB View

Files

Fritzing Files

touch-switch_Touch Switch.fz

Code Files

touch-switch_TouchSwitch.pde

Links

Related Information
Wikipedia: Darlington Transistor

Comments

  1. André Knörig # Aug. 13, 2009, 8:23 p.m.

    test

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