Digispark USB Development Board
The Digispark is an Attiny85 based microcontroller development board similar to the Arduino compatible line, only er, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar Arduino compatible IDE the Digispark is a great way to jump into electronics, or perfect for when an Arduino compatible is too big or too much.
The Digispark is shipped fully assembled except for the two included and easy to solder headers.
Here are the specs:
Support for the Arduino compatible IDE 1.0+ (OSX/Win/Linux)
Power via USB or External Source - 5v or 7-35v (12v or less recommended, automatic selection)
On-board 500ma 5V Regulator
6 I/O Pins (2 are used for USB only if your gram actively communicates over USB, otherwise you can use all 6 even if you are gramming via USB)
8k Flash Memory (about 6k after bootloader)
I2C and SPI (vis USI)
PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins
Power LED and Test/Status LED
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