What is the 2N3904 transistor? According to 2N3904 datasheet this transistor is a silicon epitaxial planar NPN general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a ...
A Planet Analog article, “2N3904: Why use a 60-year-old transistor?” by Bill Schweber, inspired some interest in this old transistor and how it’s commonly used, and if any uncommon uses might exist.