From: me@somewhere.invalid   
      
   The curtain controller I made about 12 years ago toggles the curtains to   
   open or close on pressing a momentary push button. For holidays I   
   improvised a circuit based on an LDR inside one of those old mechanical   
   mains-operated timers. The LDR is flush up against its neon light. That   
   part of my circuit has recently stopped working and I've started work on   
   it. But meanwhile I'd welcome suggestions on the *simplest* circuit that   
   would effectively turn those two long duration LDR states into a short   
   +12V pulse at each transition. Effectively giving me a parallel   
   push-button.   
      
   It would be a slog to re-install (and probably re-learn) Circuitmaker   
   right now, so please excuse this rough hand-written substitute.   
      
   https://www.dropbox.com/s/kejq0ab6jw7go5a/CurtainUnitAddOn-1.jpg?raw=1   
      
   Terry, East Grinstead, UK   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)