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Resistors and Accent LEDs
I have a few questions regarding accent LEDs and the resulting resistors I would need for them.
1)I have a few LEDs lying around the house I'd like to use, and while their currents are the same at 20 mA, their forward voltages differ from 1.8 to 3.7. can I use these in a parallel circuit with one resistor or would they have to have separate resistors? I used someones resistor calculator, but I couldn't enter two different voltages.
2) Would my layout from #1 be affected if I added a illuminated switch? How so?
3) Assuming everything has made sense so far, could someone help me find the proper resistor needed. I currently have a four AA battery back I could use, but I can order a different battery back if necessary.
Thanks for the help.
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