Introduction: How to Make LED Headlight for Bicycle Using a Bottle.

Picture of How to Make LED Headlight for Bicycle Using a Bottle.

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.

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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

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Cut the upper part of the bottle  as shown in the picture.

Step 3:

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Once the bottle is cut make a hole, this will hold our toggle switch.

Step 4:

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Screw up the toggle switch as shown.

Step 5:

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Fit the LED into the reflector. Also solder the 220k resistor.

Step 6:

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Connect the wires as shown in the circuit diagram.

Step 7:

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Once done, insert the reflector into the bottle.

Step 8:

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Now tape it firmly using the the insulation tape.

Step 9:

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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.


bhvm (author)2016-05-22

This is great,

A very cheap & Innovative method to build.

sbdash11391 (author)2012-11-21

make a larger array instead..arrange 3 leds in series and 3 such series connections parallel to each other,,,,you could easily prop up 3 leds with a 9 volt resistors reqd draws 60 ma current from 9v battery pack.....arrange for a rechargeable battery pack from old phones,,,that should minimize expenses,,,,also you can use mosquito racquet batteries.....but 2 of them drive only 2 series leds that too with a 68k resistor,,,,try it

nodoubtman (author)2011-10-18

120k Ohms or 120 Ohms?

sureshmali (author)nodoubtman2011-11-06

Its 220K ohms

anirudh007 (author)2011-11-04

hey will the refllector and the mirror available in kerala?

sureshmali (author)anirudh0072011-11-06

You'll find reflector any electronic spares part. Any torch reflector will do make sure you match the diameter to the bottle. There is no mirror involved. Its just a protective glass. That too you can find at the same spares shop. I hope this helps.

About This Instructable




Bio: I am a Project Management Analyst at a reputed brand. Electronics and Photography are my hobby which I pursue on my weekends.
More by sureshmali:Home Automation using Raspberry Pi, Arduino, Domoticz, MySensors.Easy water overflow control switch(No IC no MCU)Bi Polar Stepper Motor with L293D and Arduino
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