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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 71,992 of 72,318   
   Rich to John Doe   
   Re: Use resistor instead of regulator?   
   01 Feb 21 14:59:53   
   
   From: rich@example.invalid   
      
   John Doe  wrote:   
   > Rich  wrote:   
   >   
   >> John Doe wrote:   
   >>> Rich wrote:   
   >>>> John Doe wrote:   
   >>>   
   >>>>> I can put a resistor after a voltage that's too high for the   
   >>>>> circuit?   
   >>>>>   
   >>>>> Of course the resistor must handle the current.   
   >>>>>   
   >>>>> A decoupling capacitor after the resistor.   
   >>>>>   
   >>>>> Any problems with that?   
   >>>>   
   >>>> If your load has a variable current draw, then you will also have   
   >>>> a variable voltage on the load side of the resistor.   
   >>>   
   >>> If it's a big capacitor, the voltage variation is minimal?   
   >>   
   >> No, the size of the capacitor simply determines the rate at which   
   >> the voltage changes.   
   >   
   > Then your answer should be "Yes", given the same amount of time.   
      
   No, the correct answer is "no".  The voltage variation can be   
   substantial.  Rate of change is a different measure than voltage   
   magnitude.   
      
   > Why are you fighting this?   
      
   Note that I could ask you the same question.  My answer is correct,   
   yours is incorrect.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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