Qt Py SAMD21 Real Time Clock?
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- johnmann
- Posts: 5
- Joined: Wed Jan 16, 2019 11:49 am
Qt Py SAMD21 Real Time Clock?
I bought a few of the SAMD21 based Qt Py from Mouser for use in an ePaper wristwatch I’d built around the Seeeduino XIAO. It’s easier to modify the Adafruit version. But now I’m wondering whether the Qt Py SAMD21 supports a Real Time Clock. I don’t see a crystal on the board. Does anyone know?
- danhalbert
- Posts: 4613
- Joined: Tue Aug 08, 2017 12:37 pm
Re: Qt Py SAMD21 Real Time Clock?
The Qt Py uses an internal RC oscillator, so it doesn't need a crystal. However, it's less accurate that way, so I'm not sure you'd want to use it for time-keeping.
- johnmann
- Posts: 5
- Joined: Wed Jan 16, 2019 11:49 am
Re: Qt Py SAMD21 Real Time Clock?
Thank you for the info Dan. I won’t be able to use that RC oscillator for timekeeping. Rats.
Please be positive and constructive with your questions and comments.