DESCRIPTION We also have a selection of Basic Starter Kit, Deluxe Starter Kit, Ultimate Starter Kit. FEATURE TWI interface and the IOREF in the top and bottom connectors.This change keeps the board 100% compatible with the current boards and shields, but adds possibilities for new shields. Reset button moved from center of board to corner near USB connector. This is great; makes it much easier to access with a shield on. Larger heatsinking copper area for the LM117 regulator Uses an Atmega16U2 instead of the Atmega8U2 on the previous version. Opens up more possibilities for USB apps! Sainsmart UNO R3 can work at either 3.3V or 5V voltage by switching on the button. When supplied 3.3V power, IO port is also 3.3V and it can work with 3.3V Level module. WHAT'S IN THE PACKAGE 1x SainSmart UNO R3 Microcontroller with ATMEGA16U2 chip 1x USB cable
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