Adafruit Trinket Mini Microcontroller 5V Logic

It's a tiny microcontroller board, built around the Atmel ATtiny85, a little chip with a lot of power. It’s small enough to fit into any project, and low cost enough to use without hesitation. Perfect for when you don't want to give up your expensive dev-board and you aren't willing to take apart the project you worked so hard to design. It's the lowest-cost arduino-IDE programmable board!