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How to Use Multiple Buttons on a Single Arduino Pin – Smart Pin-Saving Trick
Running out of GPIO pins? Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor ...
Hackaday12y
Dual Core Arduino For More Pins - Hackaday
Enter the ExtraCore library for Arduino, a software library that turns two or more Arduinos into a multi-core microcontroller with more pins than you’ll ever need.
EDN10y
Arduino RFID Reader RC522 + Access Control System - EDN
MOSI -> pin 11; MISO -> pin 12; SCK -> pin 13; SS (or SDA) -> pin 10; RST -> pin 9; 3.3V -> 3.3V; GND -> GND; The resetAlarm integer is the Arduino pin where we connect the button that is used the ...
Hackaday1y
Arduino Measures Remaining Battery Power With Zero Components, No I/O Pin
[Trent M. Wyatt]’s CPUVolt library provides a fast way to measure voltage using no external components, and no I/O pin. It only applies to certain microcontrollers, but he provides example Ar… ...