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LED Resistor Calculator
TruOpto OSUB5164A X100 5mm 3.3V Blue LED pack of 100 | Rapid Online
2 LEDs in series with resistor at 3.3V won't light up, one LED works - Electrical Engineering Stack Exchange
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DC 3.3V 3.7V 5V LED Driver 30-1500MA Constant Current Adjustable Module PWM | eBay
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Driving IR led from 3.3V GPIO using 2N2222 transistor - Electrical Engineering Stack Exchange
led - Resistor requirement for 3.3v - Electrical Engineering Stack Exchange
Stak - Resistors for use with LEDs - 3.3V, 5V, 6V, 9V, 12V - 100 pack
