Hello, I have a question about the Mega2560 board with integrated esp8266. With a normal Mega 2560, the maximum current output when connected via an external power supply is approx. 800mA. So I would rather assume that with the board with integrated esp the limit is rather below 800mA. On the back …

That is based on the onboard switch mode converter capacity. There should be a schematic available but I did not find it. You can use it to power your external devices but I would suggest not using it for inductive loads unless they are clamped to protect your unit.

Arduino Mega 2560+ESP8266 WIFI maximum current output

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Arduino Mega 2560+ESP8266 WIFI maximum current output

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