555 Timer with Pause Button

S

sala

New Member

• Apr 19, 2010

• #1

Hi,
Someone proposed to me that I try this circuit, but I would like to add a pause button or a stop that pauses the count using an ON/OFF SPST button.
Does anyone have an idea on where to put the switch in the schematic below?
Thanks!
**broken link removed**

 

K

KMoffett

Well-Known Member

• Apr 19, 2010

• #2

Bad link to circuit!

Ken

 

Boncuk

New Member

• Apr 19, 2010

• #3

Same problem here: bad link

Anyway, using an SPST-switch you might be satisfied with that solution.

Connect pin 4(Reset) via 1KΩ to VDD. Connect the switch to ground and to pin4 of the timer IC.

Whenever the switch is ON it stops the timer.

Boncuk

 

Hero999

Banned

• Apr 19, 2010

• #4

There's no wat to pause a 555 timer, well not for very long anyway, as the charge in the timing capacitor will slowly leak away.

A timer can be made with a counter, such as the CD4060, can easily have a pause button added.

 

M

mneary

New Member

• Apr 19, 2010

• #5

Maybe you can ask this person how they solved the problem. **broken link removed**

 

Hero999

Banned

• Apr 20, 2010

• #6

I couldn't find the schematic on the page you linked to.

 

M

mneary

New Member

• Apr 20, 2010

• #7

Hero999 said:

I couldn't find the schematic on the page you linked to.

Click to expand...

Yeah, apparently it has been removed. I normally would have made a copy over here but last night I was lazy.

 

Last edited: Apr 20, 2010