A single Arduino Uno/Mega can carry up to 14 RS-232 boards. Each board is distinguished by ID, which is set via a DIP switch.

Analyze digital inputs on up to six channels using the ATmega328 (e.g. Arduino Uno / Nano / Ethernet / Mini).

Make a cheap variable power supply using the buck converter.

Make a Linux distribution that is focused on the development of Arduino and IoT. It's a Distro for Arduino.

Connect your Arduino via WebUSB with an web application circuit simulator.

This project can add two 3-digit binary numbers to turn into a 4-digit binary number. Math homework solved!

Track display for a Commodore 1541 floppy drive (retro hardware).

Serial Communication between ESP2866-12 (NODE-MCU) and Arduino to increase the number of analog pins as my primary work.

Simple enclosure and breadboard to mount Arduino MKR boards in a cabinet for prototyping.

Tinkercad is the largest community of 3D design enthusiasts of its kind! It is an online simulator on which projects can be made.

I made a tool to program the Arduino Pro Mini without the need to solder pins to attach the USB bus port.

Everywhere it's specified that A.Due has same pin layout with Arduino Mega, so you can use Mega's Sensor Shield on Due.

Best in class Arduino Yun controller.

Best in class Arduino 101 controller.

An Arduino-based device that can execute brainfuck code.

In this project, you can measure typically up to 48V. It is recommended to use Arduino digital voltmeter as “0-48V DVM”.

Multitasking solution for Arduino.

Makes your Arduino project into a neat, DIN-rail compatible device.

A maker kit designed for Egyptian girls who want to learn electronics.

Demonstrates the Arduino capacitance meter and RC time constants project.

If you can't find a voltmeter at home or anywhere else, then this hack is for you!

Develop a strong magnetic stirrer for the price of an entry level magnetic stirrer.

An Arduino interface to communicate with devices using the LANC (Control-L) protocol such as many Sony and Canon cameras/camcorders.

See how much battery you have left!