Task: Find minimum resistance at data sheet Forward Voltage to produce brightest LED.
Calculation: [(Power supply) 5.15V - (LED Foward Voltage) 1.85V] /[(Current)/.02A] = 165 Ohm
Find next highest resistor, reduce cost and production time (real life). In my schematic, used 2 resistors in series to make 165 Ohm. Attach to Potentiometer to produce "Dimmer Light"
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