This Pic was taken with an 8 LED ring inspired by the photoprojects site.
I took an old CD, and drilled 5mm holes in a ring. Then I inserted the LEDS and soldered them in parrallel, you can bend the legs to avoid fiddling with wires. I then added a resistor (60 Ohm from memory), and a PP3 battery. I used velcro (glue some to the battery, and some to the camera) to hold the battery in place. I used a stanly knife to enlarge the CD hole to that it fitted over my coolpix 990 lens. The lack of robustness meant the CD snapped. I have plans to make some spotlights on stalks.
Also the yellow rays here are from an array of 16 LEDS, this time embedded in some acetate cut from a chopping board. The main light is a desklamp with a daylight bulb. The array uses parralel sets of 2 LEDS in serial, 30 ohm restistor, and a 9v PP3 battery. Very portable, I use it camping.
Old Cds are the best thing Ive found for taking the LEDs, nothing sticks to acetate. Im still trying to find the best non-conducting filler for some other ideas Ive had, bathroom sealant appears to conduct slightly. BTW, LEDs are expensive, £2.50 each, so solder carefully, get the solder striaght onto the components, dont let it sit on the iron. |
