- the window is not UV resistant,
- moisture got in.
Thanks, Leo. I guess some beginners reading this thread might not immediately figure that out themselves.
Question is, where to get a similar box with UV resistant window? As you point out in a later post, glass blocks a lot of UV, so that's not ideal. Which commonly available materials are UV resistant but also UV transparent? I've heard that mica is a good choice, but where can I find a small project box with a mica window? I don't want to spend a fortune, all the other components are inexpensive.
The other question is, whether to try to seal moisture out, or accept that it will get in and allow it to drain/evaporate.
Your box is designed for a rubber gasket to go between the lid and the box. I dob't see one in either the old picture or the new picture.
It was and is there, Paul. Hard to see, but you can see it in the second picture I posted. Its some soft white stretchy plastic material that came with the project box. There seemed to be too much of it, so I pushed it into the slot all the way around and finally cut it to length plus a couple of mm so that the two ends were forced against each other in the slot. It still looks pretty good.
The project box was purchased on eBay for very little money and was described as "weatherproof". I was disappointed that the screws were not stainless, but not surprised, given the price.