Recently, I was requested to design and build a small series of modules for wall switch control. They are going to be integrated into the switch junction boxes to make them “inteligent”. The control is carried out over a CAN bus and they are able to drive 4 individual LEDs for backlight, drive one WS281x programmable LED string and read 4 igital inputs and two NTC thermistors.
Lately at $work, we wanted to check a couple of strain gauges glued to a steel structure. They weren’t in active use for the last 15 years and it was not even known if they are measuring anything. I didn’t have any suitable measurement instrument at hand. I asked whether the task is time critical or can wait for a month or so. It was a perfect opportunity to play a bit and design a strain gauge digitiser board for the NW-R platform.