How to make 555 timer as bistable mode....please reply

 

In the future, please take the time to start your own thread. Otherwise confusion will ensue.

hgmjr (moderator)

 

Like in the attached schematic & simulation.

As bistable, it acts as a Schmitt trigger.

For simplicity, I used 9v for Vcc.

Note that when the input signal crosses the thresholds (1/3 Vcc, 2/3 Vcc) the output toggles states.

Note that the output of a bjt 555 will not actually approach Vcc; it'll be 1.2v to 1.7v lower.

 

Gee Wook, I think I've seen that before...

http://forum.allaboutcircuits.com/showpost.php?p=82319&postcount=4

I'm wondering if the OP is wanting something like a Set Reset FlipFlop though.

 

Why don't NOOBs look at the datasheet?

 

Hi Audio!

Because they are in the "discovery phase"

Mike2545