Review the power input/output pins, to ensure that they have the correct Pin Type assigned. In particular, some 3.3V-based modules actually do have some 5V-powered components. On these boards, it is ...

This project helps to teach people how to communicate and control an Arduino over bluetooth. This project will allow the user to toggle the state of 5 LEDs by typing commands into their phone. The ...

There are easy ways of getting more I/O pins for any project; shift registers, I2C expanders, or ADCs will give you plenty of pins for whatever project you have in mind. All these require extra ...

Each of the 14 digital pins on the Arduino Uno can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. They operate at 5 volts. Each pin can provide or receive ...