The latest addition to my collection is a cheap portable power supply module labeled by its seller as “18650 Battery Shield (V3) for Raspberry Pi & Arduino”. The pictured shield holds a 18650 Li-Ion ...

One common mistake beginners make with Arduino is reversing this power connection ... handy in cases when you're using a 5V supply — from a Battery Eliminator Circuit (BEC) for instance.

[Trent M. 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 ...

We’ve seen [Johan]’s AA-battery-sized Arduino/battery crossover before ... the user sticks it in a battery holder for power and it uses an RFM69CW for wireless communication.

“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 ...

Kanflo’s project is a wireless Arduino clone that’s meant to operate in a way that doesn’t take up a lot of battery juice, so it’s pretty low power. Still, it has a lot packed into it and ...

This Arduino-compatible board fits neatly into a AA battery slot. Kanflo opted for this form factor to create a self-contained radio node that supplies its own power. In other words, he dropped ...

However, that has nothing on this even smaller incarnation of an Arduino ... the slot for an AA battery in a battery holder, right beside the two AA batteries that will power the board.

Claude Arpin based in Québec Canada has created a new Arduino compatible board called the Mobillyo which is a ATMega32u4 with nrf52 BLE and 1500mAh li-ion battery and comes complete with its own ...

The power supplies have overvoltage and overcurrent protection and an LED indicator. For ease of installation, each model can be mounted on a standard DIN rail. L-com’s new open-source Arduino PLCs ...