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.

Case in point: [Andrew Tudoroi] is drawn to retro LEDs and wanted one of Pimoroni’s micro-LED boards pretty badly, but couldn’t get his hands on one. You know how this ends — with [Andrew ...

The 555 is a highly stable ... and capacitor. The circuit may be triggered and reset on falling waveforms, and the output circuit can source or sink up to 200mA or drive TTL circuits. In the ...

Our blinking LED Circuit turns on and of every 10 seconds.