https://www.baldengineer.com/tag/npnRecent content in NPN on Bald EngineerHugoen-USThu, 23 Feb 2023 17:03:04 +0000https://www.baldengineer.com/low-side-vs-high-side-transistor-switch.htmlWed, 10 Apr 2019 13:45:02 +0000https://www.baldengineer.com/?p=7717A common task for a transistor is switching a device on and off. There are two configurations for a transistor switch: low side and high side. The location of the transistor determines the type of circuit and its name. Either transistor configuration can use a BJT or MOSFET. In this post, I draw the configuration for both transistor types, discuss which requires a driver, and explain why you would use either. If you are new to transistors, check out the resource links at the bottom. I have a few videos I made and some from element14’s The Learning Circuit, which do a great job introducing transistors.