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A comment on Arduino Uno R4. Parent comment

Re:Arduino Uno R4 by londons_explore on Sunday March 26, 2023 @01:48PM (#35317266)
The original ATMEGA328p may have said in the datasheet that it could only do 20mA for 2 pins...

But in reality, you can short all the pins to GND and then output high on all of them, and the chip survives indefinitely (although does get rather hot!).

It's really rather nice and robust.

[ Parent | on HN ]
Re:Arduino Uno R4 by kevin_thibedeau on Sunday March 26, 2023 @03:11PM (#35318315)
The ATmega supports 40mA on any pin. This is about the Renesas part.
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Re:Arduino Uno R4 by formerly_proven on Sunday March 26, 2023 @03:42PM (#35318710)
I think I killed only one AVR in a long time tinkering. They even tolerate pretty severe over-voltage well, probably because they support EEPROM-style parallel HV programming.

However they're also pretty expensive (especially today, an m328p is over five bucks nowadays), and have been for around ten years or more.

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Re:Arduino Uno R4 by hungryforcodes on Sunday March 26, 2023 @08:19PM (#35321272)
You can do exactly the same to an ESP32 / 8266.
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