Multimeters are a bit like potato chips: you can’t have just one. But they’re a lot more expensive than potato chips, especially the good ones, and while it’s tempting to just go get another one when you need to make multiple measurements, sometimes it’s not practical. That’s why something like this 2×4 relay-based multiplexer might be a handy addition to your bench
This is a companion discussion topic for the original entry at https://hackaday.com/2024/04/02/multiply-your-multimeter-with-relays-and-usb/