How to Make LED Headlight for Bicycle Using a Bottle.

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About: I am a Project Management Analyst at a reputed brand. Electronics and Photography are my hobby which I pursue on my weekends.

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.

Step 3:

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

Step 4:

Screw up the toggle switch as shown.

Step 5:

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

Step 6:

Connect the wires as shown in the circuit diagram.

Step 7:

Once done, insert the reflector into the bottle.

Step 8:

Now tape it firmly using the the insulation tape.

Step 9:

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.

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    6 Discussions

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    bhvm

    2 years ago

    This is great,

    A very cheap & Innovative method to build.

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    sbdash11391

    6 years ago on Introduction

    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 supply.....no 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

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    sureshmalianirudh007

    Reply 7 years ago on Introduction

    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.