merckx Posted July 28, 2009 Share Posted July 28, 2009 I'm a little confused. I need a little helping identifying a component on a circuit board which I'm going to replace the parts as it's on it's way out. It's for a cctv camera which has it's own 24 infra red leds on a simple circuit board, there's one component which I think I've identified as a smd resistor or chip resistor. Here's a pic They use a different code to the standard colour bars for the resistor value, this one has the code "0 0 0". After a search I've found that "000" denotes a "jumper type" which has a resistance of "zero ohms". I just cannot understand the point of having a resistor that is zero ohms. :blink: Thanks for any help Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted July 28, 2009 Share Posted July 28, 2009 its a surface mount resistor. I think your right, its a zero ohm link probably in the same footprint size as devices around it. rs will have them. Quote Link to comment Share on other sites More sharing options...
merckx Posted July 28, 2009 Author Share Posted July 28, 2009 (edited) Thanks for the reply It is the same footprint size but the tracks on the pcb for these resistors actually deviate completely from the standard layout to incorporate them, obviously they could be using the same pcb on another product with different components. Edit. Just found this after another search. Looks like it's used because the same automated equipment used to place other resistors can be used instead of requiring a separate machine to install a jumper or other wire. Edited July 28, 2009 by merckx (see edit history) Quote Link to comment Share on other sites More sharing options...
Hermit Posted July 28, 2009 Share Posted July 28, 2009 Thing is, a normal wire link can't be put in by the same machine as all the other bits Quote Link to comment Share on other sites More sharing options...
merckx Posted July 29, 2009 Author Share Posted July 29, 2009 Thing is, a normal wire link can't be put in by the same machine as all the other bits Yes, thanks. lol I've just been editing my previous post after I read that on Wikipedia after doing another search. Quote Link to comment Share on other sites More sharing options...
Hermit Posted July 29, 2009 Share Posted July 29, 2009 I used to design and assemble small quantities of surface mounted circuit boards by hand With the right tools, it's easier than the through-hole stuff - just plop a bit of solder paste on each pad, use a vacuum pen to place the bits, then bung it in the oven Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted July 29, 2009 Share Posted July 29, 2009 Thanks for the reply It is the same footprint size but the tracks on the pcb for these resistors actually deviate completely from the standard layout to incorporate them, obviously they could be using the same pcb on another product with different components. Edit. Just found this after another search. Looks like it's used because the same automated equipment used to place other resistors can be used instead of requiring a separate machine to install a jumper or other wire. Development tech's sometimes use them so they can jump tracks without having to use through plate holes or moving onto multi layer pcb's. I work for a company that builds downhole directional drilling equipment and I build and test there pcb's, we go down to 0603 package resistors populated by hand but we don't use zero-ohm links much as the boards are all multilayer and purpose designed for each application. If you need a couple I can have a look for you and see if there's any knocking about. Quote Link to comment Share on other sites More sharing options...
merckx Posted July 29, 2009 Author Share Posted July 29, 2009 If you need a couple I can have a look for you and see if there's any knocking about. Thanks for the offer. There's enough room to just replace them with a wire link so I'll just do that. Quote Link to comment Share on other sites More sharing options...
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