I lost my bike light a while ago, and now with shorter days aproaching i will have to ride my bike to school in the dark and at night more often. So thats where the homemade one comes in. I wanted to make a bright, yet clean looking, and compact light. The total cost is VERY low (may be higher if you dont have the battery and charger...but i already had them laying around) below you can see the before and after from the stock light to the finished one(both pics are taken from the same spot and in complete darkness):
Step 1: Materials:
-small generic flash light
-krypton "kpr112" bulb from radio shack
-some wire that has the positive and negative connected together(if that makes sense) like an old light plug, or speaker wire.
-7.2v battery and charger + male connector
-some miscillanious screws
-a handle bar mounted reflector
-a heat gun or stove
Step 2: Battery holder
Lets start with making the battery holder (gives your hot glue gun and soldering iron time to warm up) (another note: if you have soldering iron, i suggest investing in a soldering gun) To get the level of brightness and endurance i wanted, simple "aa" or "aaa" batteries would not work efficiently, or allow the light to be very small. I decided to use a 7.2v rc car battery i had. It is rated at 3300mah so it will last for many hours before a charge is necessary. to keep the actual light small, and the overall look "clean" i disguised the battery as a sport bottle. I simply removed the inner core of the cap with wire cutters so the wiring could come through the top. The rest of this will be included in the wiring section.