I Won a solarforce L2 with a UV drop in from ChibiM many months ago. It was my first p60 style light, but I didn’t know it at the time. A few weeks ago after going on a manufacturing field trip, I decided to make a drop in for the l2. Had some solder, so all I had to buy was flux, an iron($4), heatsink compound, XML, pill w/reflector, and driver(105c 8xAMC). Ordered everything from fasttech and the stuff came in like a week and a half.
I really hadn’t soldered hardly any before, only stuff when I was around 8 for RC cars. My first attempt was a disaster soldering the pill up.(Sorry for the crappy quality pictures)
I started off the project terrible! While taking the driver out of the package, I switched from knife to scissors thinking It’d be safer, but I was wrong. I snipped off the negative wire from the driver. Luckily I had an old headlamp I took apart, so I tried using a wire from that, it worked. But, I had been using really bad soldering techniques. I didn’t tin anything(despite my attempts to) and I just melted blobs of solder above things. I accidentaly soldered the star positive point to the pill, and I didn’t have any desoldering wick. So I just belt sandered the whole thing away and soldered further up the poistive connection.
It worked and everything when I tested it, but modes didn’t really work. I guess my attempt at soldering the third star on the driver sucked! So I put the drop-in in the light and tried to turn it on, but nothing happened. Took it apart and realized I had forgotten the isolation disk. Now when using a wire to test the drop in it only turned on very dim, so I guess I fried the driver. I knew It was done for.
So I ordered a new pill, driver and emitter(got a 105c but with 2 groups that you switch with the button not soldering). Unbelievably, the package shipped on the 20th, and I received it today on the 25th(From fasttech).
This time I used way better technique. Tinned my iron, and the leads of the driver; and fluxed everything possible. Soldered everything up, including the driver to pill in about 5 minutes(last time I spend literally hours trying to fix my mistakes). Tested it, put on the isolation disk, put it in the light and IT SHONE, WOOHOO! Now I have a working drop-in I made myself and all is great.
Beamshots:
Monday I will get some 3/4 inch copper pipe from my dad and add to the heatsinking, no aluminum foil for me ![]()






