As a SCUBA diver I was not happy with the size and bulk of dive lights. I wanted a slim dive light that could easily slip into my BCD pockets and be rechargeable by USB. Disposable batteries are bad for the environment and a pain to carry around on vacation (not to mention are expensive in remote locations).
On this project I designed a circuit board based off a reference design. To help with this I used an early version Upverter. It was just the level of complexity I needed at the time. The team there has a great product. They were very helpful in assisting me make my design better. Through that site (at the time) I was also able to order the PCB's from the fab. I think (based on the color) that they came from OSHPark. I highly recommend OSHPark for all your low run PCBs. Here's the project page on Upverter
You'll notice that the enclosure is a deodorant container. Gillette Cool Wave Clear Gel to be precise. This was my go-to deodorant for a while.
Pretty funny I think. I actually was able to use the screw wheel to experiment with a magnetic reed switch as the On/Off switch.
The monster sized battery came from Adafruit along with the charge controller pack. The LEDs are 1Watt Luxeons from Sparkfun. They put out a whole crap load of light. No joke. Thought, probably not by today's standards...
The project worked and I took it on a few non-diving trips to use as a flashlight. The epoxy resin I used to embed the LED lights started to yellow over time. That is pretty common for that material. After a year or so after moving on to other projects I eventually dismantled the project for parts. As a product I would have to compete with the many other great LED dive light manufacturers out there. LED lights are pretty much the standard these days.