In this Instructable I will show you how to make a flashlight out of an old, 35mm, film canister and some ultra-bright LEDs!
You don't need to spend 10$ on a flashlight that isn't even that bright. For 4$ or less, depending what you have lying around the home, you can make a really bright LED flash light. Its got for camping or just for back yard fun.
This flashlight is easy to make,looks cool and most importantly, effective!

Step 1: Components

You aren't going to need many components for this project.

1. 4x Ultra-bright, white LEDs (picture 2)

2. Film canister

3. Push switch

4. 3V coin cell battery

5. some wire (I used telephone wire)

Step 2: Tools


1. Wire cutter

2. Wire insulation stripper

3. Soldering Iron

4. Solder

5. Electrical tape

6.Scissors whit pointy edges (or a needle)

7.Something to make a hole for the push switch (I used a drill that fit the diameter of my switch)

Step 3: Lets Get Started

OK, you got the parts, you got the tools, lets get started!

Make small holes on the cap of the film canister whit the scissors or the needle, two on every side, so the LED will go trough.

Step 4: Soldering

Cut out 8 pieces of wire(like in picture 1) and strip the insulation on the ends.

The LEDs are connected in parallel, that means that all the negative (shorter) sides are connected together and all the positive (longer) sides are connected together.
Take the wire and solder it on the LEDs. One by one connect two same sides (longer whit longer shorter whit shorter) whit wires and solder them.(picture 2,3,4 and 5)

Don't cut all the end of the LEDs, leave two, one positive (long) and one negative (short) (picture 6)

Test it. Take the 3V coin cell battery and put it on the leads in correct manner. If all is good so far the LEDs should lite up.(picture 7 and 8)

On one lead of the LED solder a longer wire. Strip a bit more of the insulation on the oposite side and bend ti. (picture 9 and 10)

Step 5: Switch

Take the switch and cut out two longer pieces of wire.(picture 1)

Strip off the insulations on the end. On the end of one wire strip a bit more of the insulation and bend the un-insulated wire. (picture 2 )

Solder the wire from the switch to the remaining lead.(picture 4 and 5)

Step 6: Battery

The two end of the wire that we bended (picture 1) connect to the battery.
Connect them to the battery whit the electrical tape (picture 2) and your circuit is done!(picture 3)
Test it by pushing the switch, if all is good the LEDs should lite up.

Step 7: Make the Hole for the Switch

On the film canister make a hole for the switch. You can use a drill or anything that can make a whole.

Step 8: Put It All Togother

Now put it all together. Put the switch trough the hole, put the battery in the canister and close it all up.

Step 9: Done!

You are done!!!
You have built your own ultra bright LED film canister flash light!!!

Thanks for reading, place leave a comment and don't forget to rate!
<p>How long the battery will last ? </p><p>If i try using Nokia 3.6v Li-ion battery, then what should i change in circuit ?</p>
<p>NIce DIY !!How long the battery will supply? ?</p>
I made a variation of this. I used a 3X AAA Battery holder I had a spare of. since 3 AAAs outputs 4.5 volts I used some 56 ohm resistors on the negative side of the LEDS. So they were set up in parallel rather than In series. Thanks for the great idea, your film canister flashlight was inspiring.
Now this is something I could actually make (I'm a woman). I know how to use a lot of power tools, I've made furniture, but I've never souldered, so I think I'll have my husband actually show me how to do it. I've seen other people do it and it looks pretty easy. I already have everything but the battery. Speaking of batteries, how long will a battery last. I'm thinking I could use this in luminaries.
nice portable led light
what do you mean that all negative (shorter) sides are connected, and positive (longer) sides are connected? you mean i trim the LED ends a certain way?
The legs of the LED'S are already cut short and long some brands you have to look close to see the difference !
This is perfect for my cubs' engineering achievement! They will love this. Thanks so much!
I'm using this for a cub scout project. Could a salvage an old string of LED Christmas lights?
wow, this is great! Very clever use of the film canister.<br>I'll change the bright LEDs for red light ones, and it will be a charm for using in the photography dark room. (or maybe just use bright white ones with a film over them)
good job! I like the simplicity!
Thank you!
I would so make this! but my dad won't let me use his soldering iron. =(
Well, maybe you can make it with your father...<br /> He can solder all the connections...&nbsp; :)<br />
&nbsp;This might make me sound like I don't know where anything is (correctly), but where can you buy a push switch?
IN your local electronic shop like RadioShack...or some other shop that sells electronic components...<br />
thanks.<br />
&nbsp;&nbsp;O__O... I love this website. Seriously. I've been on here like 2 days and I've already made so much stuff that I would have spent SO MUCH money on. This is a great one, thanks.
Great that you love Instructables and my Instructables!&nbsp; :D<br />
Having my son make this as a cub scout project... Thanks!
:D Just knowing that some one is also making these makes my day! Thanks! :)
i made one out of a pill case...thanx for the idea...
Cool! Can you please upload some pics of it! I think everyone would like to see it! :)
can some one tell me what happened to the comments here
by rating this 5 stars, i bumped up your status from 3.81 to 3.85! .04 difference! great instructable
Thanks for the rate and for boosting my moral! :D
hehe Thanks! :DD
Its a push button... At any electronic store or you can salvage it from basically anything....
hey man- this is just what i was looking for- i wanted something that looked relatively easy so that i could learn from it- however before i begin - 1 question: i have a rocker switch but its not momentary( when i push on/off it stays in that position), does this matter for this project or will it work just as well? ---- oh and btw- the rocker switch i have is also illuminated( so therefore has an extra solder point on back- making 3:ground,load, and power. do i have to run a separate battery to that single prong to light it up or what ? thanks man -- appreciate it - ElementAngel<br/>
It doesn't matter that when you push it it stays on (or off)... I wont make a difference... As for the 3 lead...just leave it like that... You can check what 2 point you need whit a multimeter that show continuity...it make a sound when current is passed from point A (your red needle) to point B (your black needle). You want to find the two ends that when the switch is in the on position you hear a beep from the multimeter and when it is on the oposite side you don't hear a beep... Feel free to ask if you have any more questions! Thanks!
good ible. i like it BTW: did you ever build that spark generator?
Thank you! No, I will build it in summer, I have a really big test coming up and I have to prepare! As I said before,sooner or later I will build it!!!
good luck then
Thanks! :)
look way right and scrool up
no not here. on the previouse comment page. you will not believe how far the replies went
I have a problem whit that, i can't see all the comments... But, any way it wasn't on the list of Instructables whit the biggest number of comments, we were beat by about 30 comments... :P
well well just have to fix that wont we?
Yes we do! :D
nice job.very simple for beginners,yet it provides a reason for the more expierienced workers to build one themselves
Thanks! :D i am glad you like it! If you your self make one of these be shore to post some pics! :)
I think it is cool
i will make this instead with two quadruple A batteries(from a 9v battery) so it lasts longer i am also getting 100 high intensity white led's for ten bucks so i will probably jam as many as possible in there!
Nice plan! It will be bright as hell! Be shore to post some pictures of your flashlight!
yeah i hope it works well im still waiting for the leds to come

About This Instructable




Bio: stanislav.drca@yahoo.co.uk stanislav.drca@gmail.com ______________________ One of my favorite inventors, and one of the most brilinat minds that ever walked ... More »
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