To get ready, he made a breakout board for 32-channel analog multiplexer device he wants to use. He put the project out on Hackaday.io and also has a video tutorial you can see below. There are ...

There are analog and digital multiplexers. Digital ones are essentially logic gates and the output will be at the same voltage as VCC. Analog are more appropriate for reading multiple analog ...

There is another variation of background calibration where extra channels are used to replace the channel under calibration to stop the interruption of the normal conversion process but it comes at ...