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Published 20 hours ago • verified publisher icon TheAustrian

A0 connected to 5V?

Open jpedrodias opened this issue 6 years ago • 1 comments

The A0 was a 3.3V limit. Why is it connected to 5V? What is the 200k resistor doing there?

jpedrodias avatar Jan 27 '19 09:01 jpedrodias

Came here with the same question, but moved on since there was no answer. For future reference, I came back with an answer. Wemos board already has a voltage divider in A0 pin. So, connecting a 200 kohm from A0 to a source makes it suitable for reading roughly 5V and below inputs. See https://forum.arduino.cc/index.php?topic=649032.0

bandaangosta avatar Aug 03 '20 18:08 bandaangosta