Bill Greiman

Here Is a SAMD21 ADC with Vref the internal 3V3.  Better accuracy between 0.3 and 3.0 V.

> Just spitballing, but is it possible to design a transfer function to get you closer to what you need? Probably a quadratic fit would be pretty good for the...

Here is an example of a 12-bit MCP3202 with a Pico 2. I just put the ADC and DAC chips on a bread board with no caps so there is...

I have been trying to reduce the noise on Pico 2 3V3. The schematic has a note that I can run the RT6150B Buck/Boost converter in the default PFM mode...

> The relevant difference is, that the pico 2 comes with a buck-boost regulator, which is more efficient and is able to power the pico down to 1.8V. That is...

There is no function to turn off the OLED. `ssd1306WriteCmd()` is public so you could try sending` SSD1306_DISPLAYOFF` and `SSD1306_DISPLAYON`. ``` oled.ssd1306WriteCmd(SSD1306_DISPLAYOFF); ... oled.ssd1306WriteCmd(SSD1306_DISPLAYON)); ``` You can try it but...

Are you pulling chip select high on the second device to to be initialized so it won't interfere with initializing of the first device?

I said above that you always must insure multiple devices on an SPI bus don't interfere. Best to set all chips selects high before initializing any. see Above. > Are...

The error occurs [here](https://github.com/greiman/SdFat/blob/052d38e2c6ed64d862d8867b32e37f36b8c065ec/src/SdCard/SdSpiCard.cpp#L370). This is could be a SPI problem. The SD driver was expecting a DATA_START_SECTOR token which is 0XFE but received 0X0. >The wiring is correct since...

I will add it to SdFat-beta. Eventually it will be in the release version of SdFat. I limit releases of SdFat for minor changes since Arduino forces all users to...