My future project will be battery powered, ... Additionally, Adafruit recommends connecting a 300-500 OHM resistor between the data pin of the Arduino and the data line on the Neopixel.

What do you do if even the smallest Arduino boards (or their clones) are too big for your homebrew project? If you're Johan Kanflo, you find a way to make them even smaller. His AAduino project ...

Behind the delightfully punny name, you'll find an Arduino-compatible board the size of an AA battery. The hardware tinkerers and prototype mavens out there will invariably have stumbled across ...

Each digit is made using one pair of Neopixel rings, ... The rest of the build is pretty plain vanilla — an Arduino Nano clone, a DS3231 RTC, a Lithium battery, ...

Born from Johan Kanflo's mind, the AAduino, so named because of its size, can, almost, conveniently fit inside a 3x AA battery holder for maximum space footprint efficiency. Advertisement ...

One of the great things about the Arduino is that it’s totally open source so you can make your own variations on it. Case in point, DIYer Johan Kanflo’s AAduino, which comes in at the size of ...

The EnergyShield Arduino rechargeable battery has been created by Nightshade Electronics and has three main internal functions including a circuit to boost the battery’s nominal voltage of 3.7V ...

A Swedish software engineer — Johan Kanflo — has made a wireless Arduino clone called AADuino, which is the size of an AA battery. Kanflo explains that the AADuino has an onboard RF module ...

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.