If I directly connect an LED with GPIO pins without a resistor, will that brick my Raspberry Pi 3 B? - Quora
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Raspberry Pi Status LEDs Explained #piday #raspberrypi @Raspberry_Pi « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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switches - Control 5 V load with transistor 3.3 V - Raspberry Pi - Electrical Engineering Stack Exchange
![RPi 3b doesn't boot from sd card. Without sd card, both ethernet light up, even with sd card inserted too. ACT led wont light up. 3.3v rail works. : r/RASPBERRY_PI_PROJECTS RPi 3b doesn't boot from sd card. Without sd card, both ethernet light up, even with sd card inserted too. ACT led wont light up. 3.3v rail works. : r/RASPBERRY_PI_PROJECTS](https://preview.redd.it/fvgosflk52f81.jpg?auto=webp&s=6c8a81f4cfe2e3d54e92bfed596e8a4d34b705c9)