short cycle timers for aero ?

[BlindDate]

This one can be set from seconds to days. About $50

 

[Me2]

If you need that range of timing then buy a commercial timer for $50..no problem with that, but if it spends its life set for 1 min on/4 min off you spend $46 more than you need to :wink:

 

[BlindDate]

I also like building things. Circuits included. Do you have a schematic?