.:madworm:.'s photos with the keyword: lights

1 to 3 modules with 32pcs 129 lm/W nichia leds each. LED driver: MBI5168, brain: ATtiny2313. There seems to be a decline in brightness in the middle of the workspace when turning on more modules. I don't know if that is an effect of the camera's exposure program or if I should have used thicker wires for the supply.

200€ worth of electronics: ATmega168: 21x RGB LED: 168x

More light for macro shots - or so I hope. The center hole (28mm) should be wide enough to make this ring just slip over the camera's extended objective and bring the light to where it is needed. I may have to do some grinding and smoothing of the inside to get a good fit and prevent scratching the objective - which is made of silver painted plastic. I was able to squeeze a little controller board inside the cutout area. No fancy constant current control, just a lot of resistors, a mosfet for PWM control and an ATtiny13 with up/down buttons. It's meant to run with 5V DC. Initially I had the idea to add a little boost converter to make it run with 3V (2x AA cells) or a LiPo, but that was scrapped.