WOW! 8,000 hours would be great! Many thanks! Sorry I am really new at this. So long as I don’t change the voltage, do I need additional resistors or can I just simply use:
(2) C or D batteries in series => ~
3.0 volts to replace one CR2032 => ~ 3.0 volts, 3 mA
(3) C or D batteries in series => ~
4.5 volts to replace one LR44 => ~ 4.5 volts
1) Without additional resistors? Or, 2) Do I need to measure the current on the existing circuit (A1) with a multimeter and then protect the LED by using the formula V = I x R, for the first example 3.0 = A1 * R1
Many thanks!!!
