Hi team, I know *nothing* about multiplex circuits, and my searching isn't coming up with anything that I can easily understand. In my multiple thermocouple to PC serial port project post I had someone suggest using a single MAX6675 and multiplex the inputs. Wondering if anyone can point me to some circuit info and possible multiplexer chips to start my research? I am a newbie, for sure.... any pointers appreciated ! (also if anyone's seen a code posting that would help drive that chip I'd appreciate it).
What I *think* I'm looking for is a chip that has 4+ sets of input lines (maybe only need one line per input, and a common ground) that allows you to select a particular input and connects that to set of output lines. I don't really know how many "address" lines it would use or have, in theory I only need 2 address bits to select between my projected 4 inputs.
thanks in advance.