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Como calcular o resistor adequado para um LED.
automotive - I'm trying to use 3v LEDs in a 12V circuit, in my car - Electrical Engineering Stack Exchange
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The resistor
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10pcs New 5mm ultra bright oval red led 3v-9v-12v w/ free resistor | eBay
RS1117ASJ - Converta 12V em 3V fácil - YouTube
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Guide to LEDs and resistors
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LM317-ADJ Resistor Value and Circuit for 3.3V,5V,12V,15V,18V | Circuit Ideas I Electronic DIY Projects I Robotics
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Resistor De 3v | MercadoLivre 📦
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