Diarmuid Posted March 28, 2006 Report Share Posted March 28, 2006 On an audio circuit I am copying, there are a lot of resistors with just one line, a black one in the centre. As in the colour code, black is 0 are all these resistors likely to be 0 ohms and thus can I just replace them with normal wire?Thanks for your helpDiarmuid Quote Link to comment Share on other sites More sharing options...
audioguru Posted March 29, 2006 Report Share Posted March 29, 2006 Yes. Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 29, 2006 Report Share Posted March 29, 2006 huh!?! i never knew that! :) and i definitely haven't seen one.. so, they are just simply, JUMPERS! duh?! why would anyone want to manufacture them? what is their importance? Quote Link to comment Share on other sites More sharing options...
ante Posted March 29, 2006 Report Share Posted March 29, 2006 Hi logan,The machines which put together the pcb:s can recognize a dummy resistor but not a piece of bare wire. Quote Link to comment Share on other sites More sharing options...
audioguru Posted March 29, 2006 Report Share Posted March 29, 2006 Hi Logan,The "zero ohm" jumpers are the same physical shape as a resistor so therefore are able to be handled and placed on a pcb by automated machines that install resistors on pcbs.Same idea as Ante. Quote Link to comment Share on other sites More sharing options...
logan_dslasher Posted March 30, 2006 Report Share Posted March 30, 2006 ahh... so that's what they are for... thanks :) for the explanation, both of you.. 8) Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted April 23, 2006 Report Share Posted April 23, 2006 Also sometimes a regular jumper will ark and a wire will melt off the insullation under heavy load conditions. Quote Link to comment Share on other sites More sharing options...
indulis Posted April 23, 2006 Report Share Posted April 23, 2006 Typically they are used as jumpers on PCB's when cost has to be cheap, as in single sided or no thru plated holes. To put "ampacity" into perspective, it takes 10 amps to fuse a 30AWG wire. Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted May 4, 2006 Report Share Posted May 4, 2006 hi....10 jumbers v/s 10 resistors....where goes the cost of the system.well do u people say that these are used in automated systems which manufacture the PCBs by soldering the components?thanks for reply in advance Quote Link to comment Share on other sites More sharing options...
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