Exploring the Transistor

TouchPad Fruit.png
Touchpad-01-01.png
TouchPad Fruit.png
Touchpad-01-01.png

Exploring the Transistor

from 12.00

Skill Level: Intermediate-Advanced

Duration: 1-2 hours

Explore how a small current can turn on an LED. Use these components to make a touch-based lamp, fruit switch, or a humidity sensor. This pre-soldered Touchpad board is an introduction to transistors and exploring how objects may be conductive while having high resistance.

Quantity:
Quantity:
Add To Cart

The Touchpad uses a small current to switch the transistor allowing students to explore with different types of conductive materials. This pack includes a pre-assembled Touchpad.

What is a transistor?

A transistor is a semiconductor device. A small current or voltage at the base can control a much larger current flowing through the other leads. 

How Touchpad works? 

When the current at the Base is at 0 Volts, the transistor is in cutoff (OFF) mode. When a very small current is applied to the transistor Base, it changes it from cutoff (OFF) to saturation (ON) mode allowing the LED to turn on. 

Touchpad switches-04.png

This circuit uses an NPN transistor that looks like this. 

Touchpad switches-03.png

In a circuit diagram, the transistor is shown with a C for Collector, B for Base and E for emitter. A small voltage into the base allows a larger current to pass through the collector into the emitter.

 

Project Ideas:

Touchpad switches-01.png
Touchpad switches-03.png
Touchpad switches-02.png
TouchPad Lemon.gif

Touchpad is also available as a soldering kit. Check it out here!