Digispark ATTiny85 USB Development Board Digistump Mini Arduino Comp
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Product Description:
The ATtiny85 based mini development board is similar to the Arduino, but cheaper and smaller (of course a bit less powerful). With a whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE, this board is a great way to jump into microcontroller electronics.
Product Specs:
Support for the IDE 1.0+ (OSX / Win / Linux)
Power via USB or External Source - 5v or 7-35v (automatic selection)
On-board 500ma 5V Regulator
Built-in USB (and serial debugging)
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 (on Pin0)