This is a 12-step rotary encoder with a nice 'clicking' feel. It's breadboard friendly, and has a pretty handy select switch (by pushing in on the knob). The encoder is different from a potentiometer in that an encoder has full rotation without limits.
This is QRE1113 breakout board features a digital output, using a capacitor discharge circuit to measure the amount of reflection. This tiny board is perfect for line sensing when only digital I/O is available, and can be used in both 3.3V and 5V systems.
This is an excellent choice for anything that requires a small battery with a lot of punch. The voltage is low enough not to tax your regulating circuits, and the discharge rate is high enough to accommodate a lot of electronics and a few small motors. The battery has two cells and outputs 7.4V storing 1000mAh of charge.
This is a simple plastic plate that holds an Arduino (Mega R3 or Uno) and self adhesive breadboard. This version still holds an Arduino and a self-adhesive clear breadboard but we've done away with the plastic clips and now provide screws which give you a more solid and simple connection.
This is the comprehensive guide to ZigBee wireless networks. This kit includes many of the parts and pieces you will need to work through the examples in the book. If you're serious about learning everything you need to know about XBee networks, this kit and the book will get you up to speed in no time (or as long as it takes you to get through the book).
This smaller solenoid is designed to work directly with 5V which makes it a great match for embedded projects.
This is a 3.3V Arduino running the 8MHz bootloader meant for users that understand the limitations of system voltage. It's a great board that will get you up and running quickly.
