(Special Note: This 20th installment of Signal Chain Basics is the last one by Bill Klein; see his note at the end. And as always, there are links to the previous parts of this series at the end, ...

If you know anything about a transistor, it’s probably that it’s a three terminal device whose output pin forms part of a potential divider whose state is dependent on what is presented to its input ...

A key subsystem in a programmable logic controller is the analog input module, which provides a high-precision front end to measure a wide variety of sensors. In many cases, however, the amplifier ...