I just use the wall-wart type power supplies for my DC devices.  Some of them are on timers .. no problems except with some of my older DC fans. 
 
Princess Auto can be a good place for 12VDC power supplies if you're looking for some of those. 
		
	
		
		
		
		
			
				__________________ 
				 -- Tony 
 My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills.  Whee! 
 
			 
		
		
		
		
	
		
		
	
	
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