This is a small size led flasher built with the 555 timer IC that is powered from 2 x 1.5V batteries. The circuit can be used as a flashing metronome, dark room timer, memo-reminder or other similar ...

They look for all the world like any other LED, though embedded in the plastic dome is an integrated circuit to do all that flashing work ... wasn’t able to make a 555 flash the LED from ...

Finding that his recently purchased LED Christmas lights defaulted to an annoying blinking pattern that ... alternating 500 Hz square waves with a 555 timer and a 74HC74D dual flip-flop.

Here is a 1Hz pulse/frequency generator using the popular timer IC 555 which is wired as an Astable Multivibrator. The output pulses can be indicated visually by the LED. An Astable Multivibrator, ...