Simple timing circuit

[killer8424]

Hi, I'm working on a project that requires an adjustable timing circuit. The output of the circuit needs to be on/off voltage from either a set of watch batteries or AA batteries (I haven't decided yet). I need to be able to adjust the input voltage so I can get different time intervals between the output pulses. Any help on how to get started with this would be great. Thanks in advance.

 

[blueroomelectronics]

Have you looked at 555 timers?

 

[KMoffett]

Details...details...details!

Output pulse width?
Time range between pulses?
What does the output drive?

Ken