Most electronics enthusiasts and electronics engineers today grab a microcontroller when things threaten to become a bit complicated, and, likewise, most of us don’t use discrete transistors anymore. Where possible, we use operational amplifiers (opamps), and for good reason: Modern opamps offer unbeatable performance, so there’s no reason not to use them. Accordingly, in this installment, we provide a brief introduction to this new workhorse of electronics. However, we first take a last look at transistors in the form of field effect transistors (FETs), after a brief follow-up on the previous installment.