one that fires off an SMS to predefined contacts upon mains power failure. The first step was to enable communication between an Arduino Micro and a Nokia cell phone. His Nokia 3310 uses FBus ...

always remember to interconnect the Arduino GND terminal with the external 5VDC power supply GND terminal. Connect pins according to the instructions given above, and download the sketch into Arduino ...

“Supplino is a Quick & Dirty PSU (Power Supply Unit) made with some widely available breakout boards, an Arduino Nano (or an Arduino Nano Every) and a graphical LCD. Power output is given by a ...