Adafruit USB Li-Ion/LiPoly Charger - v1.2 LED

Adafruit USB Li-Ion/LiPoly Charger - v1.2 LEDThis is a Lithium Ion and Lithium Polymer battery charger. It uses a USB mini B for connection to any computer or 'USB wall adapter'. Charging is performed in three stages: first a preconditioning charge, then a constant current fast charge and finally a constant voltage trickle charge to keep the battery topped up. The fast charge current is 500mA by default, but is easily adjustable from 100mA up to 1000mA by soldering a through hole resistor on

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which can be used for either 868MHz or 915MHz transmission/reception - the exact radio frequency is determined when you load the software since it can be tuned around dynamically

It's a round

and turned back on by a brief button press

A good power supply such as our 5V 10A supply is key

These 4x4 button pad boards are fully tile-able and communicate over I2C

The processor has plenty of GPIO

and Fuzeboxen

Introducing Adafruit FONA MiniGSM

behind picture frames

Arduino-only Circuit Playground

Two terminator plugs are included to ground any pair of inputs or to route the waveform generator and/or clock outputs to BNC sockets