I built up the first prototype bulb today on the DIY LED light project. It was a complete pain because the LEDs have a thermal pad underneath the package and I had to use a heat gun on each one to solder them down. At least all the LEDs are lit and working as intended.
The picture below shows the LEDs lit at 10% power. If I crank them all the way up there's no way to take a picture without the rest of the electronics going completely to black. I also haven't built any of the necessary heat sinks for the bulbs yet, so I'm hesitant to crank up the power to 100% for more than a few seconds. In the final design there will be six bulbs, which should yield a useful amount of light for video.
The heat sink design is my next endeavor. I've been learning mechanical CAD so I can do a proper CAM job and produce nice looking heat sinks. The bulb design incorporates a digital thermometer so I can monitor the LED temperature. Hopefully this weekend I'll get firmware for that feature up and running.
It's getting there SLOWLY, but slow is OK. This is just a hobby project and I already have thoughts about version 2.
UPDATE : I have the thermometer running (woo hoo!). The bulb gets hot pretty quick without a heat sink.
HOW WE DID IT: Doc Style
2 years ago