상황
A Raspberry Pi drives a dual-color LED with common anode from two GPIO pins, using low-side switching through current-limiting resistors.
이 도면에 담긴 내용
그 이면의 의사결정을 읽어 보세요.
01
Use common-anode LED with both anodes tied to the 3.3V rail
02
Connect each cathode to a GPIO pin through a 330 Ω resistor to set LED current
03
Tie Raspberry Pi ground to the 3.3V supply return
Reuse for any 3.3V microcontroller driving common-anode LEDs where GPIO sinks current to turn each color on.