Simple two-transistor circuit lights LEDs

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https://www.electronics-lab.com/news/simple-two-transistor-circuit-lights-leds/

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 approach. The circuit uses a […]

Replacement LED driver for AN6877

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https://www.electronics-lab.com/news/replacement-led-driver-for-an6877/

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 replacement chip for AN6877 is also quiet difficult. The circuit […]