Can 555 timers be used as RS flip flops ?

[desperado1]

The 555 timer contains an RS flip flop. Can 555 timer be used as an RS flip flop ?

 

[erikl]

The 555 timer contains an RS flip flop. Can 555 timer be used as an RS flip flop ?

Why not? Control via the inputs CONTROL_VOLTAGE / THRESHOLD and TRIGGER.

 

[desperado1]

can you give the schematic please ? i m new with 555 timer.................
thanks in advance

 

[erikl]

You can find it at any dateSheet service, e.g. here:
http://search.datasheetcatalog.net/key/NE555

 

[desperado1]

i want the schematic and not the datasheet

Added after 1 minutes:

in which pin should we give R input and in which pin should we give S input .............and do we need to short any pins.

 

[erikl]

i want the schematic and not the datasheet

The datasheet contains the schematic.

Added after 1 minutes:

in which pin should we give R input and in which pin should we give S input .............and do we need to short any pins.

I already told you in my first answer. I suggest you read more thoroughly!

 

[desperado1]

i read it thoroughly but cudn't get a clue on how to use it as a RS flip flop......?? plz suggest me

 

[erikl]

i read it thoroughly but cudn't get a clue on how to use it as a RS flip flop......?? plz suggest me

Control via the inputs CONTROL_VOLTAGE / THRESHOLD and TRIGGER.

Ok, a little bit more. Here's a symbolic representation of a 555 IC :
It's from https://www.elektronik-kompendium.de/public/schaerer/st555.htm , and it includes the explanation, but in German language. Essentially it says:

A LOW pulse at the TRIGGER input (pin 2) sets the RS-FlipFlop: OUTPUT (pin 3) gets HIGH. A HIGH pulse at the THRESHOLD input (pin 6) resets the RS-FlipFlop and OUTPUT (pin 3) goes LOW.
If the input CONTROL-VOLTAGE (pin 5) is not used (to change the trigger level), connect it with a 100nF cap to GND. If /RESET/ (pin 4) isn't used, connect it to Vcc. Leave DISCHARGE (pin 7) open.

HTH!

 

[desperado1]

Thank you so much............i.e. i can take pin 2 as the R input and can take pin 6 as the S input. Am i right ???

 

[erikl]

i.e. i can take pin 2 as the R input and can take pin 6 as the S input. Am i right ???

Not quite:

A LOW pulse at the TRIGGER input (pin 2) sets the RS-FlipFlop: OUTPUT (pin 3) gets HIGH. A HIGH pulse at the THRESHOLD input (pin 6) resets the RS-FlipFlop and OUTPUT (pin 3) goes LOW.

You really should read more thoroughly ;-) Is this, possibly, your problem ... and the reason for your name? ''

Pin 2 is your /S/ (active LOW), and pin 6 is your R (active HIGH).

 

[sreevyas]

See the data sheet with application circuit, you can findout how to use