Arduino Micro: direct access to on-board leds

How to make Arduino Pro Micro at Home - Share Project - PCBWay

Multiple Push Buttons on One Arduino Input - The DIY Life

Adafruit Metro Mini 328 - Arduino-Compatible - 5V 16MHz ADA2590

Due R3 (Arduino Compatible) - ProtoSupplies

Arduino Tutorial: LED Sequential Control- Beginner Project

Pro Micro ATmega32U4 5V 16MHz Leonardo Arduino Compatible – Envistia Mall

LED COB Controller - Maker and IOT Ideas

Arduino Nano

The Ultimate Arduino Board Guide For Beginners and Experts - Whadda