ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROM running at 8MHz
1.1** / 28mm diameter and 0.28** / 7mm thick.
USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can program it with the Arduino IDE (with a few simple config modifications)
~5.25K bytes available for use (2.75K taken for the bootloader)
On-board 3.3V power regulator with 150mA output capability and ultra-low dropout. Up to 16V input, reverse-polarity protection, thermal and current-limit protection.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 1 inch
Height : 1 inch
Length : 3 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 0.64 ounce (View shipping rates and policies)

ASIN : B01MG6LG7I