Australian Amateur Radio Station
Many circuits exist for sequencers........  Here's one I find very useful, that is built around a
PicAxe as opposed to a comparator type IC.  This way the delay between the different stages
can be individually set as opposed to a standard Capacitor / Resistor combination.

Schematic in *.PDF

Schematic in "Eagle" Format

Component Layout in *.PDF

Etching Pattern in *.PDF

Etching Pattern in "Eagle" Format

PicAxe Software
It is all very basic and nothing new, but it's what I use and it works very well
giving me a lot of flexibility in the timing.
For those with Eagle, it would be VERY easy to shrink the board down