Just use the relay. It doesn't care about polarity or anything and you only   
   need one for like 150 volts an under one amp. Get off the two bucks.    
      
   Get a DPDT and you get to choose whether the circuit is open or closed when   
   not energized. A transistor can't really do that. Well I guess it can with a   
   little bit of thought but you got a solution right there at "Relays-r-Us".   
      
   I have this hammer, it is older than I actually, came from the early 1900s.   
   When I need a hammer it works better than any screwdriver, pliers or anything   
   else in my toolboxes. The concept of the automatic transmission in your car is   
   about 80 years old,    
   same with front wheel drive and disk brakes.    
      
   Those "19th century" items still do the job and there is a reason they still   
   sell them.    
      
   Hmmm, sitting here PBS is running on the boob tube with no sound but I see   
   this is like "this Old House" or something and what do I see ? The guy is   
   using pipe dope and not that garbage ass teflon tape. A hundred year old   
   method is there ever was one.    
   They were all agog about the teflon tape but I know it is garbage.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)