You don't need to spend 10$ on a flashlight that isn't even that bright. For 4$ or less, depending what you have lying around the home, you can make a really bright LED flash light. Its got for camping or just for back yard fun.
This flashlight is easy to make,looks cool and most importantly, effective!
Step 1: Components
1. 4x Ultra-bright, white LEDs (picture 2)
2. Film canister
3. Push switch
4. 3V coin cell battery
5. some wire (I used telephone wire)
Step 2: Tools
1. Wire cutter
2. Wire insulation stripper
3. Soldering Iron
5. Electrical tape
6.Scissors whit pointy edges (or a needle)
7.Something to make a hole for the push switch (I used a drill that fit the diameter of my switch)
Step 3: Lets get started
Make small holes on the cap of the film canister whit the scissors or the needle, two on every side, so the LED will go trough.
Step 4: Soldering
The LEDs are connected in parallel, that means that all the negative (shorter) sides are connected together and all the positive (longer) sides are connected together.
Take the wire and solder it on the LEDs. One by one connect two same sides (longer whit longer shorter whit shorter) whit wires and solder them.(picture 2,3,4 and 5)
Don't cut all the end of the LEDs, leave two, one positive (long) and one negative (short) (picture 6)
Test it. Take the 3V coin cell battery and put it on the leads in correct manner. If all is good so far the LEDs should lite up.(picture 7 and 8)
On one lead of the LED solder a longer wire. Strip a bit more of the insulation on the oposite side and bend ti. (picture 9 and 10)