Here is a link to my AC-DC DIY LM317 Voltage Regulator Module build files, which I posted separately a short time ago. Again this is a small inexpensive easy to build, very versatile little module, which offers DCS interference protection and is ideal for engine or railcar installation. With offshore parts it cost less than a buck to build!
Link: https://ogrforum.ogaugerr.com/...t-module-build-files
Rod