Hi guys
I am new to the forum and to electronics I am an electrician so I know my way around . I want to build a timer based on a 555 chip that I can regulate (with potentiometer) between lets say 10-40 sec on/off mode (stays on for the time wanted).
Any links or help is appreciated .
Thanks

 

Google 555 monostable.

 

Hello,

Just take a look at tony's website:
http://www.sentex.ca/~mec1995/gadgets/555/555.html

Greetings,
Bertus

 

Thanks guys.. And that site is great ,just what I was looking for!

 

Geese guys, do I have to toot my horn every time!

555 Monostable

The 555 Projects

Bill's Index

 

I have read the links and thanks alot , but does anyone have a diagram to make a monostable for 10-30 sec with a potentiometer .
Sorry for being such a novice !
Thanks in advance
Trusty

 

From 555 Monostable

Rt should be a 47KΩ resistor in series with a 100KΩ, Ct should be a 580µF. You will have to make the cap value using several capacitors. This was figured using basic algebra.