The flasher circuits below operate on a single 1.5 volt battery. The circuit on the upper uses the popular LM3909 LED flasher IC and requires only a timing capacitor and LED. The top circuit, designed ...

As on-off indicator in various types of electronic circuits. Some LED’s radiate infrared light ... If fuse opens the line voltage drives the LED through capacitor and thus LED glows. Thus blown fuse ...

Guest columnist Naoyuki Kobayashi, senior product manager at Murata says that one problem frequently encountered when designing LED lighting circuits is that the capacitors in the circuit experience ...

With cycling safety in mind, I bought a pair of low power red LED things that ... is the circuit above. The idea is that the constant current source – a traditional two transistor source – feeds a few ...

Seen in the accompanying schematic, the 555 square wave generator drives an MPF102 FET, which in turn drives a D718 power transistor that provides a “pulsed” 12V variable duty cycle driving the LED ...