Back to the design description, the D13 signal output pin (TP4), which is logic-low ... Now is the time to see the sample code (Arduino Uno/Nano Sketch)… To summarize, infrared close proximity sensors ...

of the Arduino. Here is the test code that indicates the soil wet/dry conditions using just two LEDs (green & red). int GLED= 13; // Wet Indicator at Digital PIN D13 int RLED= 12; // Dry Indicator at ...

The Raspberry Pi is a credit card-sized computer capable of running full-fledged Linux distributions such as Raspberry Pi OS, ...

If you’re working on an air quality monitoring project and space is at a premium, SparkFun’s latest Qwiic breakout board ...

The basic idea behind Arduino is to plug one or more small electronic sensors into the board's analog or digital connection pins, usually labeled on the front of the board next to the pin headers.

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 Arduino code ...

It’s a fairly simple project, too: just hook an Arduino Uno up to a motion sensor and an electronic switch called a relay, then plug in your fan, and you’re good to go. If that sounds ...