The SpikenzieLabs Calculator Kit, is an electronics kit that makes a working pocket calculator that can add, subtract, multiply and divide. The electronics is easy to solder through-hole parts. Assembling the case is also part of the fun. It is a styly set of laser cut acrylic pieces.
The LSM303DLH is a triple axis accelerometer combined with a triple axis magnetic sensor. This breakout board uses the LSM303DLH to give a you the data you need to feed into a microcontroller and calculate tilt-compensated output.
We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Pro Trinket 3V or 5V, but when size isn't as much of a concern, and a USB-serial converter is...
Turn your paintings into touch sensors. Say what? Yes! And that's only some of the amazing things this Bare Conducitve Touch Board can do. This board is designed to be integrated with the Bare Conductive Paint, though you can use many other conductive tools (it has 12 electrodes which can have any conductive material connected to it).
if you're new to electronics and programming, the RedBoard Starter Kit is a great way for beginners to get their foot in the door. This little guy is essentially a mini SparkFun Inventor's Kit (minus the manual which you can find below) and can be taken straight out of the box
The TReX blends RC, analog, and serial inputs for a powerful motor control solution capable of delivering a continuous 13 A per motor. The TReX will work right out of the box as an electronic speed control (ESC), but its ability to seamlessly transition between RC/analog and serial control makes it capable of so much more!