Let's get started.
Step 1: Materials
- Altoids Smalls tin: ~$1.50 at a drug store. Or buy them in bulk on Amazon.
- (1) Wire Housing: $0.13 at Mouser.com
- (2) Wire Header: $0.14 each at Mouser.com
- 3V Coin Cell Battery: Find them for cheap on ebay.com
- Coin Cell Battery Holder: $1.56 at Mouser.com
- (2) Small Pieces of Hookup Wire
- (1) Rubber Grommet: 1cm across, can be found at any hardware store
- Dremel Tool or Rotary Device
Step 2: Individualize the Wire Headers
In the picture below, I have noted what you will need to trim off on the headers in order for them to fit in the housing.
Step 3: Some Soldering
Do the same for the other wire header as well. You should now have two wire headers with two pieces of hookup wire attached to them.
Step 4: Some More Soldering
Since most of the LEDs that I use are safe with just the 3V battery, I did not add a resistor. But if you have LEDs with a lower voltage drop, then there is definitely enough room inside to add a resistor. To add a low Ohmage resistor, connect it between the negative lead on your battery holder, and the wire header thatis connected to that piece of hookup wire.
Step 5: Drilling and Securing
The rubber grommet (for those who don't know) should have one half sitting on top of the Altoids tin, and one half sitting on the other side.
Now take your metal wire headers, and place them into each hole on the plastic, white wire housing. You should be inserting the headers into the side that has the pattern set for the headers. (Not the side with just the rectangles.)
Be sure that the headers are securely fastened inside of the plastic header.
Now take the plastic header, and poke it through the rubber grommet on the Altoids tin. The side with just the rectangles should be facing outwards.
Step 6: Testing
Insert a 3V coin cell battery into the battery holder, secure everything inside of the tin, close the tin, and you are done!
Find an LED with a forward voltage of around 3V, and test it in your new Minty LED Tester!