This Automatic Battery charger circuit can be used to charge a 12V, 7Ah battery, or above. The charger maintains float voltage, if battery is fully charged.

Based on the Tiny328, AAduino takes the platform to its sexiest form factor yet: Turning a three-AA battery holder with two batteries in it — the third battery compartment holds the AAduino ...

This morning a new one came our way. [Johan Kanflo]’s AAduino is an Arduino clone with an onboard RF module that fits within the form factor of an AA battery.

A Pro Mini model was chosen for its small size as it could be housed in the radio compartment of the dash. The next step was getting the Arduino to control the aftermarket head unit.

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.

His AAduino project turns the already miniscule Tiny328 Arduino clone into an even smaller computing device that's about as big as an AA battery.

An Arduino and an LCD panel form the core components of the circuit. The circuit, apart from measuring the battery capacity can also be used for temperature measurement and data logging.

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.

This project require only components that are available on the Arduino Starter Kit. Make sure to keep the battery well connected during the recharge process if you do not have a good mounting for the ...

The true measurement of a battery’s capacity is essential for many scenarios. A capacity measurement device can solve the problem of spotting fake batteries as well. Nowadays fake Lithium and NiMH ...