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Como Reduzir Tensão com Resistores
The resistor
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12V To 3V Converter Using BD139 NPN Transistor
Got a simple (and embarrassing question), is this the correct way to power 3 white LEDs? 12v power supply and 3 470 resistors behind each LED. I've learnt that i shouldn't power
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Choosing the Resistor to Use With LEDs : 3 Steps - Instructables
automotive - I'm trying to use 3v LEDs in a 12V circuit, in my car - Electrical Engineering Stack Exchange
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Solved 38. Calculate the voltage Vo across 3k2 resistor | Chegg.com
