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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: Flight102C3 on November 22, 2010, 03:45:37 PM

Title: tach/ speedo wires
Post by: Flight102C3 on November 22, 2010, 03:45:37 PM
Hi, how goes the battle?  why are the wires twisted for the signal? If they are not twisted what happens? Thanks for now.
Title: Re: tach/ speedo wires
Post by: Bill B /bus on November 22, 2010, 04:12:16 PM
You're dealing with a small voltage pulse.  The pulse will be affected by adjacent  wires as stuff is turned of an on. Current variations wills cause erratic readings. Reason is the any magnetic field, a current carrying conductor and relative motion between the two will cause a voltage to be induced in the conductor. Twisting prevents the magnetic field from having an effect on the conductors. Actually the voltages induced will cancel each other.

Bill