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I received my "Genuine" Arduino UNO R3 without any labels on the stackable pins - General Discussion - Arduino Forum
![arduino mega - What are the negative PINs for on the IndustrialShield M- Duino 58 Analog - Arduino Stack Exchange arduino mega - What are the negative PINs for on the IndustrialShield M- Duino 58 Analog - Arduino Stack Exchange](https://i.stack.imgur.com/0NVZ0.jpg)
arduino mega - What are the negative PINs for on the IndustrialShield M- Duino 58 Analog - Arduino Stack Exchange
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Schematic of the LED lightboard. The power ground pin of the Arduino... | Download Scientific Diagram
![arduino mega - What are the negative PINs for on the IndustrialShield M- Duino 58 Analog - Arduino Stack Exchange arduino mega - What are the negative PINs for on the IndustrialShield M- Duino 58 Analog - Arduino Stack Exchange](https://i.stack.imgur.com/IV5W0.png)
arduino mega - What are the negative PINs for on the IndustrialShield M- Duino 58 Analog - Arduino Stack Exchange
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