Turn an Unused USB Cable into a 5V Power Cable « Adafruit

Rimstar has another DIY how-to guide, this time for turning a USB cable (especially those male Type-B cables that you might have an abundance of) into a simple 5V power cable. The video includes sh…

Motor Shield V2 for Arduino by Adafruit Industries LLC Datasheet

Different issues Energy measurement device (Power-jack vs USB

USB Mini Hub with Power Switch - OTG Micro-USB : ID 2991 : $5.95

Just about all electronics use TTL serial for debugging, bootloading, programming, serial output, etc. But it's rare for a computer to have a serial

Adafruit FTDI Serial TTL-232 USB Cable

How to Make Your Own USB Car Charger for Any IPod or Other Devices

This adorable little board will come in very handy whenever you need a good amount of 5V power. It's the size of a linear regulator, but it's actually a mini-booster! Input 2-5VDC on one side, and get 5V at up to 1A supply on the other. Perfect for use with battery-powered projects with 2 or 3 Alkaline, or a single Lithium battery. This booster uses a very small but thermally efficient chip from TI, the TPS61023. This chip has nearly everything integrated, including dual 3A MOSFET switches.

Adafruit Miniboost 5V @ 1A - TPS61023 ADA4654

If you have an ItsyBitsy or Pro Trinket you probably know it's the perfect little size for a portable project. This LiPoly backpack makes it really easy to do! Instead of wiring 2 or 3 boards together to make a charging system, this little PCB sits on top of the PCB and allows a LiPoly/LiIon battery to plug in. When the Pro Trinket or ItsyBitsy USB port is powered, the battery is recharged automatically. Unplug the USB port and the microcontroller will switch over to the rechargeable battery.