5 GPIO – 2 shared with the USB interface. No need to unplug/replug the board every time you want to reset or update! Reset button for entering the bootloader or restarting the program. On-board green power LED and red pin #1 LED Power with either USB or external output (such as a battery) – it’ll automatically switch over Up to 16V input, reverse-polarity protection, thermal and current-limit protection. On-board 3.3V or 5.0V power regulator with 150mA output capability and ultra-low dropout. ~5.25K bytes available for use (2.75K taken for the bootloader) We really worked hard on the bootloader process to make it rugged and foolproof, this board wont up and die on you in the middle of a project! Mini or Micro-B USB jack for power and/or USB uploading, you can put it in a box or tape it up and use any USB cable for when you want to reprogram. USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can program it with AVRdude (with a simple config modification) and/or the Arduino IDE (with a few simple config modifications) Internal oscillator runs at 8MHz, but can be doubled in software for 16MHz ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROM
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