Little Bird Electronics posted an article about using an analog voltage reference with Arduino. This is a tool ... as a voltage divider or an adjustable regulator, can give you a reference voltage ...

Rather than featuring the typical voltage regulator used by Arduino boards (used to allow the board to be powered by a voltage source greater than 5V), a switching regulator allows for less energy ...

The kit uses a palm size Arduino board made with an ATMega and a boot loader. From there, it also includes a tiny breadboard, a homemade 5V voltage regulator, and a USB. It's all packed into a ...