current checking

Discussion in 'General Electronics Chat' started by chrissyp, Oct 28, 2008.

  1. chrissyp

    Thread Starter Active Member

    Aug 25, 2008
    82
    10
    I am building a test unit to monitor the current delivered by a wiring loom controlled by a current configured LM317.I am going to use a Lascar SP 400 lcd display for the readout.To get the reading i require the data sheet say's that the Rb shunt resistor should be 1R , i see that the sums are fine.My question is on the +v rail is a resistor (Ra) which states it should be 0R.Do i need to use an 0R resistor, if so why, does this afford some protection in the circuit or can i disregard it and just wire straight in.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    A schematic would be helpful but if a resistor has a value of zero (there is not such a think unless its a superconductor!) then you replace it by a wire.
     
  3. chrissyp

    Thread Starter Active Member

    Aug 25, 2008
    82
    10
    Thanks Mik3 that answered my question.
     
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