[Kevin Darrah] wanted to make a simple 3.3V regulator without using an integrated circuit. He wound up using two common NPN transistors and 4 1K resistors. The circuit isn’t going to beat out a cheap ...

In previous parts of this series we reviewed the basic transistor parameters that determine ac voltage gain and practical considerations limiting high gain. The role of a coupling capacitor was ...

The ZXTR2000 family of high-voltage regulators from Diodes Incorporated boosts power-circuit densities through reductions in component count and footprint by monolithically integrating a transistor, ...

In a fashion similar to using stacked Zeners for voltage regulation, this LED circuit cleverly combines voltage reference and voltage indication. Fig 1. This voltage regulator circuit (a) uses green ...

Nerd Ralph loves cheap and dirty hacks, and for that we applaud him. His latest endeavor is a LiFePO4 battery charger that he made out of parts he had on hand for under $0.50 US. (Although we think he ...

Editor's Note: The following tutorial is one of a series of six on transistor theory by Howard Skolnik, retired Burr-Brown designer. Skolnik and Bob Dobkin, CTO of Linear Technology, will be our ...