There was need for a headlight for my Bicycle and could not find one in stores, so I decided to build one myself.
Step 1: Materials Required.
2Ltr Empty Pepsi/Coke Bottle -1pc
1W LED Light -1pc
Torch Reflector -1pc
Resistor 220K/1W or .5W -1pc
Toggle Switch(any switch will do) - 1pc
Screws - as required.
Some wire, Paper cutter, scissors, Insulation Tape, Soldering Iron(if you don't have one you get it soldered from a friend or a mechanic.
Step 2: Cutting the Bottle
Cut the upper part of the bottle as shown in the picture.
Once the bottle is cut make a hole, this will hold our toggle switch.
Screw up the toggle switch as shown.
Fit the LED into the reflector. Also solder the 220k resistor.
Connect the wires as shown in the circuit diagram.
Once done, insert the reflector into the bottle.
Now tape it firmly using the the insulation tape.
Now it should look something like this.
In case you don't have a battery pack. You can use 4AA sized batteries jut remove the resistor and connect the batteries directly.