Electronics

Voltage, current, resistors, LEDs, sensors and wiring that is safe for you and for the board.

1 article

Wire an LED to an ESP32 the right way: sizing the resistor with Ohm's law

Why an LED always needs a resistor, the step-by-step sum for an ESP32 (3.3 V) and an Arduino Uno (5 V), which GPIO pins are safe, and blink and button code.

5 min read