This is a Decoder Tester that can be used to test DCC Decoders before they are installed. It is really helpful in also testing different speakers and enclosures/baffles that will be used with the sound decoder if using a sound decoder. You can read more about building it and also a description of the parts you can print using the print files here on my web site here...

http://1fatgmc.com/RailRoad/Decoder-1/page-11.html

More on other items I've designed here ....

http://1fatgmc.com/RailRoad/3D-Printer/3D-Printer-Index.html

....and other model railroad items here ...

http://1fatgmc.com/RailRoad/RR%20Main/Railroad-Index.html

Creality

Ender 3

No

No