I was messing with LED's to use with the audio port in my Passport. I refused to pay the $70 for the commercial units.
I bought LED's and supplies at Radio Shack and could make them work, but was having trouble coming up with a mount. Until last night! This thing is super bright by the way!
Energizer 3 LED light
that goes on a hat bill. $10
Mono audio plug 3.5 mm
Mono audio cable
$? (I robbed an old cell phone ear bud)
Small piece of Velcro
(I also had laying around)
Here are my basic, crude directions and pictures:
First turn the light on, then remove the batteries. That way you will know it's on when you hook it up.
Push the pin out that holds the hat clip on.
Gently pry the top and bottom halves apart.
Make a hole in the back of the battery door for the wire to go through. I used the soldering iron since it was there and hot.
Put your wires through, tie a knot in it and solder to the connectors for the batteries, which are clearly marked + and -.
Make your wires as long, or short as you want. I made them short enough that they just reach to the top of the detector.
Put the audio plug cover over the wire.
Solder the positive wire to the long leg of the mono plug and the negative to the short.
Glue the halves back together.
Put your Velcro on and put on top of the Detector.
Turn detector on and hold the volume + button (mine beeps if I hold it).
Plug the LED's in and hold the volume + again. If you had the lights on when you removed the batteries, you will be blinking rapidly now. lol
Note: I removed the brackets molded in the bottom half for the hat clip, I don't think it's necessary since the Velcro takes up a little space. It might help aim it toward your face too.