So I didn’t actually finish it. I know; I’m really surprised too. I did find a 20v 200mA wall wart though. Originally being a drills battery pack charger, now that the battery is dead anyway, well, you know.
Using these I can hook up 6 and still have room for slop. I figure the beer bottle itself will act as a decent diffuser.
I am slightly concerned about the possibility of great build up. I mean they are relatively low power LEDs, but I’m still looking at close to 500mW of heat while operating, in a glass bottle. This makes me think it’ll be fine, based on the minimal heat sinking built into the 3W LEDs that all the kids are using today. I figure one I breadboard the basic circuit and do the LEDs in the bottle, I’ll just let it go for awhile and watch to make sure I’m not getting too hot. Makes me wish I had a temperature probe did my arduino so I could set it up as the controller pushing the transistor and logging the temperature data and killing the circuit before hell came to town. Even to make a ghetto fuse if need to know the normal opposing temperatures first.
I also need heat shrink tubing or electrical tape.
Peter's stuff.