Hello everyone
Can someone help me for making spark gap footprint i find symbol of spark gap in lib but footprint not find and also try to make footprint but it’s not properly done and B.cu layer not add with B.mask i have added to SMD pad for connection it’s fine for connection but as i making arrow its missing B cu layer and i duplicate Bmask layer and in properties i have change duplicate layer in B cu but its not showing in print preview.
Please help for makin proper Spark gap with technical dimensions
Here is a sparkgap footprint I made a few years ago.
Sparkgap_2021-09-02.kicad_mod (3.3 KB)
It has 4 teeth and on the the PCB it looks like:
The grid is 0.1mm, I set the gap to approximately 0.25mm to be easy to manufacture by any PCB manufacturer. I never calculated the breakdown voltage for it.
thank you paul,
i have download and add footprint in lib but as adding footprint with error i m using kicad 8.0 attaching screenshot for error please help for remove this error
0.25mm at standard atmospheric pressure is about 2 KV according to page 22 of this NXP app note
How familiar are you with KiCad’s library management?
I see two libraries with the Spargap nickname and as far as I know that is not allowed. The $(Footprint_dir)/Sparkgap.pretty must also be an existing directory name, and you have to copy the footprint itself into that directory.
Other options are to put the file into an existing directory (maybe for “miscellaneous” footprints) or to copy some other footprit files into that directory, just to see if KiCad recognizes those.