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led - Resistor requirement for 3.3 V supply - Electrical Engineering Stack Exchange
TruOpto OSPG5111A-VW 5mm 3.3V Green LED High Brightness 15° | Rapid Online
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Exploring Edison - Life At 1.8V
microcontroller - Can I use blue-green LEDs as MCU state indicators on 3.3 V power? - Electrical Engineering Stack Exchange
3.3v &3.3v LED how to connect 12V series circuit, how to calculate led series resistor, watts - YouTube
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Logic Level Shifters for Driving LED Strips – Electric Fire Design
