LED Altoids Tester





Introduction: LED Altoids Tester

Altoids LED Tester with 2x AA Batterysupply made of old IDE Cable

Tools you need:

Altoids Gum Tin
Soldering Iron
wire cutter or caliper
Battery Clip for 2xAA batteries
2 AA batteries
1 old IDE cable

20min of your life ;)

By the way.. I was inspired by this awesome Instructable:


Step 1: Find Empty Altoids Can

I like the size of this one because it fits 2x AA batteries pretty well.
Besides the gum tastes delicious.
*But don't eat all at once..*

Step 2: Find and Dismantle the IDE Connector

If you have a IDE or Floppy Cable, simply dismantle the connector.
Now you should have just the connector with the pins on the back without the cable.

Step 3: Soldering the Pins

First make shure how many hole you will keep for testing.
I left 8 holes and cut the rest with a caliper.
In the picture i drew 5 pins each row (10 holes) depending on how you like it.
You can either cut first and solder afterwards, or solder first and have some grip and space to solder.
I prefer the second version.

Solder the pins on each side and be careful that you don't connect with the other Row.

Solder now the positive wire of you batteryclip to a 68 Ohm Resistor (just in case *thanks for the suggestions*) and connect to other end of the resistor with one row of the IDE Plug, the negative wire to the other row.

Step 4: Test and Glue

Before you glue everything together make shure it really works!
Once glued there is no way back!

I used red hotglue to match the color of the Altoids.
Keep the connector fixed until the glue is cold.

Glue the Batteryclip first, then fill up the empty space as you like.
Check the polarity of the LED(s) you connect.

Now you're good to go.

Have fun with it. I certainly do.



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We have a be nice policy.
Please be positive and constructive.




I can't figure out what it is you will be testing.

You can test if the leds you have laying around are working or not without having to solder them together

The majority of my LEDs are about 3.1 and 3.2 Volts so this would be perfect.

But I do have some like the yellow, orange and red ones that are about 2.1 -2.4 Volts

Maybe if I make this I'll include a switch for supplying either 2 Volts or 3 Volts.
Just need to add a resistor and a bit of wire and a switch as far as I know.

just adding a resistor should do. since its just for testing the 3v LEDs won't be so bright with a higher resistor but you can cover almost any led for testing then..

actually i made a joul thief for testing.. that works with just one battery.

For step 3 you don't really have to solder, you can use a strand of the wire you took the plastic out of and push it into the little pins. If you use a knife to push the cable down further into the pin you get a more secure connection.

Simply to determine if your led works or not. But I made a better one using a joul thief to use just 1 AA battery for a quick check.

nice, but you should throw in a resistor somewhere.

Thanks. I think I don't need a resistor for testing, plus it's only about 3V. Most of the LEDs (exept high power LEDs) work at about 3V. The blue one is not as bright as it could, but it will work. Correct me if I'm wrong ;)