A versatile signal-conditioning circuit for use with with programmable logic converters or controllers that can accept only one input polarity. Matching a sensor interface with a programmable ...

An NPN sensor is a ‘sinking’ sensor because it sinks the output to ground whereas a PNP sensor is a ‘sourcing’ sensor because it provides positive voltage to the output. Below you can see the standard ...

It’s easy to remember that NPN stands for Negative-Positive-Negative and PNP stands for Positive-Negative-Positive. Let’s take a closer look at how NPN and PNP transistors work. There are two ...