Brief 555 bistable mode flip flop alternating LEDs circuit

Table of Contents

Bistable mode 555 timer means that the output stays in it’s current state of either high or low, until forced to change to the other state. After changing states, it stays in it’s new state until forced to change again. 2 stable states = bistable.

555 timer pin layout illustrative diagram by electronzap electronzapdotcom
555 timer pin layout illustrative diagram by electronzap electronzapdotcom

Brief circuit schematics with short video – List of pages
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Diagram

Simple 555 timer bistable mode flip flop alternating LEDs circuit schematic diagram by electronzap electronzapdotcom
Simple 555 timer bistable mode flip flop alternating LEDs circuit schematic diagram by electronzap electronzapdotcom



Assortment of commonly used integrated circuits (IC). I made a lot of videos with them.

  • Set: If the output is low, and you give a low signal to trigger pin (2), then the output will go high and stay there.
  • Reset: If the output is high and you give a low signal to reset pin (4), then the output will go low and stay there.
  • Reset pin (4) always overpowers trigger pin (2). So, if you give a low signal to both of them at the same time, them the output will be low.

Video

Output goes high when set/trigger button is pressed. Output goes low when reset button is pressed. Output is always low if reset button is held low.

Quick 555 timer bistable flip flop mode circuit schematic to breadboard build by electronzap

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  • Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.