stan2004 posted:Moot at this point if using screw-terminal connectors on the PCB, but that could be the Molex mini-SPOX connector:
If this is indeed the correct connector system, here's the 4-pin PCB-side vertical header from DigiKey.
I bring it up because it reminded me of another DIY PCB hack. Note the SPOX is a 2.5mm (0.098") pitch while many connectors are 2.54mm (0.1") pitch. So if you do the math on the connector pin diameters and PCB holes size, you can easily install either a 2.5mm OR a 2.54mm connector for short connectors like the 4-pin used in the traffic signal. Some free-ware/share-ware PCB layout program may not have a library of 2.5mm footprints and if not used to creating new components, it can be expedient to use an existing 2.54mm component which every layout program has.
Just for the FYI of it all and future reference, I finally got around to ordering and received these from Digikey today. I got both the male and female connectors (and terminals - still untested). The 'SPOX' connectors easily fit themselves with just a slight 'push - pull' to connect or un-connect them. The MTH plugs fit the Spox headers, but are quite snug and it takes some effort to get them apart. With the MTH to MTH connectors the 'push - pull' is snug, but much easier as the matching SPOX connectors.
Oh my, I think I really butchered that description, hope you get the idea and it is not too confusing. To sum it up, these will work with the MTH headers, but they are a very snug and tight fit that isn't as easy to disconnect as the MTH factory stuff.
Edit: You probably already knew this, but... After careful examination of the MTH connector with a magnifying glass, it had ' 5264 4 DL 18 ' in raised characters molded into the connector. Each set of characters was on a separate line, not consecutive as I have here. Doing a search at Digikey '5264' took me right to the SPOX connectors you found above. I got nothing using a couple of different combinations of the other characters in the searches.
