This project I did on a summer camp with a group of kids. (8 - 12 year olds) Everybody succeeded (some with some help from me) and we had loads of fun with it.
Step 1: You will need (Parts)
- 1 PVC pipe (We use this in Europe to put electrical wiring in)
- 2 caps that are used for chair-legs and fit the PVC pipe
- 2 AA batteries
- some plastic
- 1 LED
- 1 resistor
- 1 reed-switch
- 2 plan-board-magnets
- a piece of wire
- drill (size of your LED: 5mm?)
For decorating you can use whatever you like:
- colored tape
Step 2: Preperation
If you are going to do this with kids, you will need to do some preparations:
- Cut the PVC-pipe in the right length: just al little shorter than the two batteries and one of the magnets put end to end.
- Sand off the edges of the pipe, so the end caps will go on easier.
- Drill a (5mm?) hole in the middle of one of the end caps.
- Cut a piece of 10 cm wire.
You will need to do this once for every child that is going to make a flashlight.
Step 3: Cut the plastic
The plastic will be a isolator between the anode of the LED and the battery. You can use any kind of plastic sheet you van find. I used a front-sheet that they use at Kinko's.
- You cut a square that is slidily smaller than the inside of the tube.
- Next you round it off so that it will fit inside the tube.
- To finish it, you will need to pinch a hole in the middle with the needle.