fish2005 Posted June 11, 2006 Report Share Posted June 11, 2006 Frequently a potentiometer is front panel mounted, far away from PCB. If this pot is used as a potential divider to form a voltage reference (let say 5V input from motherboard and milivolts range output back to motherboard ), the wiring problem becomes important. So what is the ideal wiring schematic? simple 3 wire twisted cable.2 wire (in+out) whith 1 shield (ground) cable3 wire (in+out+ground) whith 1 shield unconnected at one endOr maybe a complete separate ground like 2 simple wire for +5V - 0V input whith a 2 wire shielded cable for output?Brrrrrr...Adrian Quote Link to comment Share on other sites More sharing options...
MP Posted June 11, 2006 Report Share Posted June 11, 2006 If it is only a 0 to 5VDC signal, you can use a shielded cable to shield against rf. Connect the shield at one end only to keep from producing ground loops.If you are experiencing signal loss due to length, you can increase the current to the pot to compensate.If the length is too long for this, you might want to consider a digital pot with a memory. However, this will increase the expense of the device you are making.MP Quote Link to comment Share on other sites More sharing options...
fish2005 Posted June 11, 2006 Author Report Share Posted June 11, 2006 Thanks for your repply.You say to run simple 2 wires for 5V and ground to the pot, and 1 shielded wire for the low voltage return?Something like this Quote Link to comment Share on other sites More sharing options...
MP Posted June 11, 2006 Report Share Posted June 11, 2006 Should work fine.MP Quote Link to comment Share on other sites More sharing options...
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