Introduction: Cheap Mtb Led Front Light
I used 1 5w12v led in this build, you can also use more powerfull led spots or use more than 1
With this setup the battery will last around 5 hours
The price of the parts was around 20 euros You can find almost all the parts on ebay or your local lumberyard
The led is 500 lumen
You can charge the battery with the 2 nails on the cap and a 12v battery charger
Parts:
1 12v led spot 5-10w
12v battery(I used a 2.3ah)
Drinking bottle
50mm pvc pipe and shell
Switch
Wire
Glue
Hose clamp
2 nails
Electric tape
2 battery clips
1 bolt and 1 nut
Tools:
Drill
Scissors
Hot glue pistol
Soldering iron
Hammer
Step 1: Battery Pack
Cut the drinking bottle with scissors to fit the battery inside
Connect 2 wires with the clamps to each terminal of the battery
Put the 12v battery inside the bottle and glue it in place
Make a hole in the top of the bottle and run 1 negative and 1 positive through
Put 2 nails through the top of the bottle with a hammer
Solder 1 negative wire to the nail and the positive to the other one
Repair the bottle with hot glue
Step 2: Led Light
Make a hole inside the cap of the pvc pipe with a hammer and a nail, run the negative and positive wire through
Outline the marks of the switch on the plastic cap and cut it out
Put the switch in the opening and solder 1 of the cables to the switch, solder a shorter piece on the other side of the switch
Put the pvc pipe onto the led spot and glue the led inside with hot glue
Solder the wires to the led, do electrical tape on the soldered connections
Test the led and close the cap
Step 3: Connect Lamp to Handlebar
Drill a hole in the middle of the clamp
Put the bolt through and screw the nut onto the bolt inside the pvc pipe
Wrap some tape around the clamp and connect it to the handlebar