0 ohm resistor as jumper

[slashguitar]

Hi. I would like to use 0 ohm resistors (either 1206 or through hole) to route tracks under them on single sided boards. Is there a way to insert them directly from the PCB editor and how can I make altium see the same net at both terminals so I don't get errors.
Thanks

[gxti]

You don't need to put it in your schematic.

• Place a footprint directly in the PCB (keyboard shortcut: p c)
• Edit the footprint properties and set type to 'Graphical' so it doesn't get erased when you import changes from schematic
• Edit both pads, set the net for each to whatever net needs jumpering, and set the Jumper ID to 1 so altium knows they are electrically connected

More info: http://wiki.altium.com/display/ADOH/Pad#Pad-JumperConnections

[slashguitar]

Thanks a lot

[David_AVD]

That's a great little bit of info.  I needed to do this on the other week with a single layer PCB, but had to split the net and put the zero Ohm resistor in the schematic.  Another tip learned and bookmarked!   

[poorchava]

Generally a good practice to split circuit into few sections with 0R jumpers. Often makes it easier to debug the design (you can disconnect other parts of the circuit easily). of course using jumpers as a way to handle crossing tracks is also ok.

You only need to remember that 0R jumper in reality doesn not have 0 ohms. In case of small smd's I'd say something like few miliohms. This can make serious difference in some designs. Also - each jumper type has some maximum current it can safely carry (rather large values - something like 1.5-2A for 0805 IIRC)

[robrenz]

You only need to remember that 0R jumper in reality doesn not have 0 ohms. In case of small smd's I'd say something like few miliohms.

Specs I have seen only guarantee <20m Ohm  for a Zero Ohm jumper so it can be a big deal depending on your circuit.

[David_AVD]

I'm always amused at the 0.25W rating for zero Ohm resistors.   

[SeanB]

Even more amusing is that they have a voltage limit as well.