Smallest LED Flashlight

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About: i am 16 year old,soon 17, kid . i am from Serbia . I am now 2nd grade in High School and i like making simple things because i am learning through that. i am really interested in electronics, bikes, and fishing

This is one of the smallest flashlight that you can make.
you dont need special tools, casing,switch,etc.
its simple and quick project that you can make just following this steps :D

Step 1: Parts

You will need :
1x LED ( any color,white is brightest)
1x cr2032 battery ( 3v battery, button cell)
some glue from glue gun
lighter
scalpel

Step 2: Building

First you gonna do is to cut small peace of glue.
than put anode of LED to positive side of battery. Put peace of glue on anode and start heat it with lighter ( for 2-3 s) . when you melted glue just ake scalpel and push it so that glue can stick to battery.

Step 3: Finish

when you finish this just bent cathode back.
when you want to use it just push cathode to - end of battery and light comes....

one note, my LED is glowing ok but battery is half discharged ( i scrap 50 batterys from old motherboards so half of them are discharged and half is around 2.8 v )
this flashlight can work as mouch as led throwie (1-2 weeks constant, or on daily use from bed to bathroom = 1 year)

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    14 Discussions

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    BOOM OWWWW

    5 years ago

    I have a 9.6v battery and want to make a detonator but don't know what resistors to use for the LEDs?

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    BOOM OWWWW

    5 years ago

    Howe much do u need to make a wire glow to set off fireworks?

    1 reply
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    tealkBOOM OWWWW

    Reply 5 years ago on Introduction

    i dont know. but here is full list of nice projects for firework igniter

    https://www.instructables.com/tag/type-id/?sort=none&q=FIREWORK+IGNITER

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    tealk

    5 years ago

    you will need 2 aa batterys because resistance of 50ft 12 gauge wire is only 0.08 ohms

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    BOOM OWWWW

    5 years ago

    How many AA battery's do u need to power through 50 ft of wire

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    BOOM OWWWW

    5 years ago

    How do I hook a LED up to a 9 v battery with out burning it out?

    1 reply
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    tealkBOOM OWWWW

    Reply 5 years ago on Introduction

    you need 330 ohm resistor to connect on + end of battery

    this is calculator http://led.linear1.org/1led.wiz

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    longwinters

    5 years ago

    Sorry to bust yer bubble but the led's that back light cell phones are smaller than a pin head, the only problem is hooking them up without breathing because a puff of air blows them away.
    A hearing aid battery and an led would fit easily in half a sugar cube

    1 reply
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    tealklongwinters

    Reply 5 years ago on Introduction

    oh man, i said its one of the smallest flashlights not the smallest flashlight.
    Also i could trim anode and cathode and use smaller battery, and instead of 5mm LEd i could use 3mm led .......you could make smaller then this but not easy as i did.....thank you for comment

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    MrE

    5 years ago on Introduction

    Please submit a new twist for this as all this is, is an led throwie, which has already been shown here.

    1 reply
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    tealkMrE

    Reply 5 years ago on Introduction

    it isnt LED throwie. led throwie is LED atached to battery and its turned on all the time...
    my instructable is about LED whose anode is attached to baterry and cathode is free, so when you push cathode to battery (negative end of battery) it turns on.