– M元58 OPA decouples the LED on I/O13 to make the port usable for other purposes as wellĪdditional features as advantage over the original Arduino UNO R3: – Transistor “Q1” protects your computer’s USB port when UNO is connected to “Vin” source the same time – Diode “VD” avoids conflicts between different power supplies when connected to 2 different Vin sources same time ![]() Essential features of the Original Arduino UNO R3, not included in many of the Chinese boards: With the included pin header and the special advanced board layout, is our UNO R3 board much better suitable for your breadboard projects than any other UNO R3 board design, the original Arduino UNO R3 included (see picture). ![]() Our UNO R3 board comes with the essential features of the original Arduino UNO R3, with some additional advantages. Arduino UNO R3 compatible microcontroller development board with CH340G USB-TTL bridge.
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