Gregory's ServerI was looking at a way of reducing line noise on power supply for this project and looked at putting a common mode choke on the v+ and gnd lines, but it turns out, how you wind the toroidal core has a lot to do with how effective that might be
I just came across this article
https://incompliancemag.com/article/why-didnt-i-see-this-coming/
Turns out winding like this, which is better for signals, is actually better for power in my case too. Toroidal cores are much cheaper than finished chokes and it's also easier to wind by hand
There's also the issue of project boxes. Generally, these are injection moulded ABS plastic and come in small sizes with screws and such. Some are weather "resistant". The cheaper ones are almost always only for keeping out humidity, not being submerged or sprayed with water
Which makes me wonder whether I actually need a project box, or just a small diameter PVC pipe. Only one end needs to be sealed while the "wire end" can be pressure fit with a bit of silicone around the holes in the cap