You can use an external one or use the one soldered on the board (pin 13). Turn ON an LED Sketch This is a very simple arduino project where a led is turned on by setting the pin 13 as output, then ...

This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

You can fade out and fade in the light of an LED automatically by using Arduino and a simple code that is described below. Even though the Arduino board cannot output variable voltage on its digital ...

Developing a Simple NIRS System Using Arduino. Friday, June 3, 2016. 1:00 PM-3:00 PM. BIOMED Master's Thesis Defense Title: Developing a Simple NIRS System Using Arduino ... and the versatility of a ...

An Arduino can be used to test the life of any battery with less than 5 volts, Boxall says. So, for a quick way to see how much juice your AAA, AA, C, or D batteries have left, build this Arduino ...

This article covers the circuits and the code to make that happen. ... Using motion detectors and an Arduino you can trigger lights, ... flash the on-board LED in front of digital pin 13.