Transistor Touch Switch Simple Science Project Parts List

This is the breadboard that I used because I happen to have several of them. I find that they are a good general size for making small circuits and they snap together when more breadboard area is required.

No matter what projects you decide to build in the future you will need resistors. Having a handy stock of different value components on hand can prove very useful.

I used two 470Ω resistors in this project but you could use any value between 100Ω and 1kΩ if you have them handy.

Transistors are very useful. You can use them to build all manner of circuits and you will often find you need one or two even when dealing with more advanced microcontroller projects.

Any high intensity LED will do. Most LEDs available today are high intensity so it should be easy to find some.

I have a reel of bare 21 AWG (22(SWG) solid copper wire which I tend to use for short hook ups. Insulated solid hook up wire will do the same job for you and you can strip the insulation off so that you can use a longer length to make the touch strip.

V1

You can generally buy a 9v battery from almost any store. I have included it into the parts list for completeness to allow you to order everything at the same time if you wish.

Cheap snap on battery connectors provide an easy way to connect and disconnect power from your circuit.