Tag: 2n3904

Barry Tigner @ edn.com has a design idea on how to power a LED from a 1.5V battery using two easily available transistors. A previous Design Idea describes a circuit that uses an astable multivibrator to drive an LED (Reference 1). The circuit in Figure 1 uses a simpler alternative...

Dilshan Jayakody has designed a board to replace AN6877 base LED drivers using discreet transistors. He writes: AN6877 is linear AF level meter IC produced by Panasonic and it is commonly found on many audio equipment. This chip is no longer manufactured by Panasonic and finding...