Editing Basic Circuit Building Blocks

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*Output1 Output 1 for null reading.
 
*Output1 Output 1 for null reading.
 
*Output2 Output 2 for null reading.
 
*Output2 Output 2 for null reading.
*Meter  Use to detect meter balance = null = 0 reading.
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*Meter  Use to detect meter ballance = null = 0 reading.
  
 
Discussion:
 
Discussion:
  
The circuit is basically two voltage dividers with the output taken across the output of each voltage divider.  It is in "balance" when the output is 0.  This is true when R1/R2 = R3/R4.  The output traditionally went to a galvanometer a very high sensitivity meter. Input traditionally was a battery.  By using calibrated resistors for R1, R2, and R3 the value of R4 may easily be calculated.  The whole circuit including a wide range of precision resistors, the battery and galvanometer was all packaged in an box and sold as a unit.  The same principal can be used with components other than resistors and AC for input instead of DC.  
+
The circuit is basically two voltage dividers with the output taken across the output of each voltage divider.  It is in "ballance" when the output is 0.  This is true when R1/R2 = R3/R4.  The output traditionally went to a galvenometer a very high sensitivity meter. Input traditionally was a battery.  By using calibrated resistors for R1, R2, and R3 the value of R4 may easily be calculated.  The whole circuit including a wide range of precision resistors, the battery and galvenometer was all packaged in an box and sold as a unit.  The same principal can be used with components other than resistors and AC for input instead of DC.  
  
 
More Information:
 
More Information:

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