XPost: sci.electronics.basics   
   From: jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net   
      
   Thomas G. Marshall wrote:   
      
   > Hugely fundamentally ignorant question.   
   >   
   > If I have an electronics device that claims to take a power adapter of 12V   
   > 200mA, and I plug in one rated at 12V 800mA, will the device merely draw the   
   > proper 200mA (because the voltages are matched)?   
   >   
   > Or is there something about PA's that can somehow force too much current   
   > into a device?   
   >   
   >   
   >   
   The rating on the supply indicates what it can deliver to the device in   
   terms of current. All this means is a connected device requesting   
   current can not ask for any more than 800 ma.   
      The device connected governs how much current will flow, the supply   
   only indicates the amount it can give with out damage or shut down to   
   it self.   
      
     Voltage of the supply must be close or exact to what the device requires.   
     In your case you have a 600 ma reserve or power, so you are fine..   
      
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   "I'd rather have a bottle in front of me than a frontal lobotomy"   
      
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