Fritzing Arduino Pro Micro

You have two options:

void setup() pinMode(9, OUTPUT); // LED on pin 9 (common on Pro Micro) Serial.begin(9600);

Ensure the "GND" pins are all tied to a common ground plane in the PCB view. Ready to build your project? If you want to dive deeper, let me know: Are you making a mechanical keyboard or a macro pad ?

Switch to the . Fritzing will automatically create ratsnest lines. Clean them up:

Arduino Pro Micro is a popular choice for compact electronics projects due to its small footprint and native USB support via the ATmega32U4 chip. Using it with