Arduino Mega 2560 Rev 3
The Arduino Mega 2560 is a development board based on the ATmega2560 microcontroller. The Mega is designed to support more complex projects, in comparison to the UNO board which is more suitable for beginners.
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SparkFun ESP8266 WiFi shield not present on Arduino Mega 2560 REV3 - Hardware - Arduino Forum
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A000067: Arduino Mega 2560 Rev 3
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Unable to access 2 SD cards with Arduino Mega 2560 Rev3 - Storage - Arduino Forum
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Arduino Mega 2560 Rev3 - DFRobot
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Arduino Mega 2560 REV3 [A000067] : Electronics
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Arduino Mega 2560 Pinout, Projects & Spec
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Arduino MEGA2560 REV.3 powered by Meanwell NDR-120-12 - Project Guidance - Arduino Forum
Arduino Mega 2560 is designed for your most ambitious projects which require additional pins and extra memory Based on the 8-bit AVR microcontroller
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Arduino Mega 2560 REV3 [A000067]
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Arduino Mega 2560 R3 (Rev3): Review the Specs