[sdiy] kicad footprints for SR16 rotary swicthes?

[Mike Beauchamp]

Hi Scott, it's pretty fast and easy to make your own footprints. There's 
a few tutorials online for that and it's quick if you know Kicad. 
Sometimes datasheets don't give all of the measurements required to make 
a footprint, so I suggest a cheap pair of digital calipers to make your 
own measurements.

For a rotary switch like this, I'd draw a circle on the silkscreen layer 
representing the outside diameter. Then I use one of the layers for 
"draft lines" to be deleted later and I'd draw a circle the diameter of 
the pins and then a line from the centre extended to intersect that 
circle, and copy and rotate it 45 degrees for all 8 pins. Where those 
lines and circles intersect drop a pad with an inside diameter 120% of 
your measured pin diameter and a pad diameter of whatever you feel 
comfortable soldering.

Taking a bit of time to measure your part and making a custom footprint 
just ensures that things are going to work the very first time, and lets 
you customize exactly how you want it to appear on the silkscreen and 
how big of pads you want. With switches like this, I go with pretty big 
fat pads for more mechanical contact. While you're making the footprint, 
edit it and save for the different variations so you're covered in the 
future.


Mike

On 2/9/23 10:19 PM, Scott Bernardi via Synth-diy wrote:
> I'm trying to find kicad footprints for SR16 type rotary switches (16mm 
> diameter, PC mount) that look like this
> 
> https://cubusynth.com/products/sr-16-2p4t-4-position-rotary-switch-16mm
> 
>    AliExpress has them in
> 1 pole 5 pos
> 1 pole 6 pos
> 1 pole 8 pos
> 2 pole 4 pos
> 2 pole 3 pos
> 
> https://www.aliexpress.us/item/2251832764807484.html?gatewayAdapt=glo2usa&_randl_shipto=US
> 
> It's the 2 and 3 position ones I'm interested in. I'm starting to build 
> a EuroRack synth. so I want something that can be PC mounted behind a panel.
> Good for switching oscillator waveforms to one output jack.
> Or what do others use?
> 
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