Speeduino is now on Github Sponsors (Rather than Patreon): https://github.com/sponsors/noisymime
Any general discussion around the firmware, what is does, how it does it etc.
May as well just use a i2c/spi ADC at that point. Run it off 5.0V VDD and VCC, then do something to convert the logic level, depending on the speed of the communications could be simple or could be complicated...

There's a really nice little dual BSS138 package that works well for converting i2c logic levels. Otherwise I've had good luck just spending the money and using a nice chip like the max3390 for converting high speed SPI.
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