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Mini flashlight

November 2, 2010 Electronics / DIY electronics 100 377 12

There are times when you need a small-sized light source or light source will not be at hand. This mini flashlight can come to your aid. It can be made in a short period of time from available parts.

Here it is in the picture.

To build it, we need: a 3-volt tablet battery, an ultra bright LED, a battery cassette and a button. The battery cassette can be removed from the old motherboard from the computer, there are buttons in almost any electronic device, for example, I took it from an old printer. The battery and LED can be purchased at any radio store.

Now you need to solder all the parts into one electrical circuit observing the polarity. I will not give the scheme, I think you will save it yourself without problems

To give structural strength and to give the case a flashlight fill it with hot glue.

All our mini flashlights are ready.

It shines fine and the battery charge is pretty decent. If the battery runs out, simply replace it.

come back

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Comments (12)

#1 Mikro Guests November 3, 2010 19:05
1
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#2 Mikro Guests November 3, 2010 11:06 p.m.
1

In my opinion, I did such nonsense in class 3
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#3 Mikro Guests November 16, 2010 17:25
1

Damn every time I look, I think well, and dull off the lighter, tear it a hundred times cooler
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#4 feelloff Guests November 16, 2010 18:31
2

All currents are clever, but they themselves would at least do something. . . .
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#5 Sadist Guests January 12, 2011 15:16
1

Grew up, huh? In grade 4, do you need something stronger?
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#6 feelloff Guests January 12, 2011 18:34
2

Do it better!
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#7 Ilya Guests February 26, 2012 13:16
0

Help me please!!!
And how to solder, if I have 4 ponytails on the button, and not two as in the picture ???? : wassat:
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#8 Ilya Guests February 26, 2012 13:21
1

and where else can I get a battery cartridge other than the computer motherboard ?????? : belay:
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#9 Nikolay Guests May 3, 2014 20:49
0

I bought one for 0.01 bucks in China!
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#10 Evgeniy Guests March 13, 2015 23:12
3

In this design, there are 2 extra parts, a button and a battery compartment, just stick the battery between the long legs of the LED at the right time without any soldering (observing the polarity) and rejoice!
- To answer
#11 Pavel Guests March 17, 2016 16:48
1

Attach the chewing gum to it and it will be possible to stick where the light is needed, but there is not enough space
- To answer
#12 Oleg Orlov Guests August 9, 2016 22:18
0

1) LED.
2) Battery.
3) A piece of cardboard.
4) Adhesive tape / electrical tape.
5) You may need some kind of wiring, since the LED is likely to be soldered from somewhere, and as a result, the legs will be chopped off.

A cardboard is made of a substrate for minus a lithium “tablet” with a hole in the middle (the size of the hole depends on the thickness of the cardboard and the native leg of the diode or wires - so that there is clear contact when pressed and no less clear opening when released), the diode is installed, wrapped with tape . All.With careful assembly, a soldering iron is not needed even with a short-legged diode.
- To answer