Comment by userbinator
16 days ago
A more mundane and common use of this technique is for reading the displays of weighing scales, digital micrometers, and similar instruments which did not originally have the feature to enable computer connectivity.
In my teens, I built a digital serial interface for a scale company my uncle was a salesperson for, think highway and landfill truck scales. This is how I built it, very straightforward to your point, mitm from the scale to the display.