Posted: 7/28/2009 7:52:13 PM EDT
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OK EE's I need a simple circuit. 2 LED's (Say Green For instance), AA or 9 volt power source and simple switch. What I want to is to put the LED's in a deer skull so the "eye's" glow. I know I need a resistor but I'm not sure if I calculated it right. Using a 9 volt the resitor should be 240 ohms, right?
Pmc |
| You really need to provide the specs for your LED to get the best answer. Assuming 20 mA and a forward voltage of 2 V you'll want a 350 ohm resistor if wired in parallel. 330 ohm is close enough and is very common. If in series you'll want a 250 ohm resistor or something close. You can use just about any switch you want for this circuit. |
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If you want a really freaky effect, use cats eyes marbles, and put a red,yellow, green led,( or red yellow red)
in series in a row behind each marble, hook both in parralel, it changes color depending on where you see it from. use 100 ohm and 9v I did this with a gargoyle many years ago. |
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Quoted:
I would go to michaels and buy an LED light kit for 5 bucks Yea but a "real" electronics store would have LEDs for 25 cents and 1/4-watt resistors for 10 cents. (and Radio Shack isn't a real electronics store anymore) Also, you don't need a switch, just snapping the 9V battery on is the switch. ~ |