Many on old analog board used DIP switches for setting amplifier gains.
"There was a time when you could change some equipment with DIP switches either legit from the outside, and sometimes less legit if you got inside and found the DIP that set configuration. I once had a setup to measure velocity of projectiles using two optical sensors spaced a known distance apart. You could change the range of the time and the units it reported in via a DIP switch."
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.