4V Train Whistle electronics - Printable Version +- LDraw.org Discussion Forums (https://forums.ldraw.org) +-- Forum: Models and Parts (https://forums.ldraw.org/forum-18.html) +--- Forum: Parts Authoring (https://forums.ldraw.org/forum-19.html) +--- Thread: 4V Train Whistle electronics (/thread-28513.html)

4V Train Whistle electronics - Rene Rechthaler - 2024-11-18 Hello, I need help numbering (and composing) a part... I dont have the physical part but got good pics from Ddriver, so the part itself is nearly done.     Part(s) in question: x871a/b http://www.peeron.com/inv/parts/x871a http://www.peeron.com/inv/parts/x871b https://www.bricklink.com/v2/catalog/catalogitem.page?P=x871a#T=C&C=12 https://www.bricklink.com/v2/catalog/catalogitem.page?P=x871b#T=C&C=12 https://rebrickable.com/parts/upn0313a/control-unit-train-45v-whistle-brick-4-x-8-x-2-with-forwardstop-functions/ https://rebrickable.com/parts/upn0313b/control-unit-train-45v-whistle-brick-4-x-8-x-2-with-forwardstopreverse-functions/ from the outside, its the same brick, but the B version has some electronics inside to reverse it. Now the big question: how should that get split (and numbered)? Its consists of base (black) electronics (dark tan) and cover (clear) BL and Peeron have the main (paintable) color clear and the base is hardcoded black. I would use u9618-20, each in a and b like the microphones u9616. a is the older Forward/Stop and b the newer Forward/Stop/Backwards Should i use u9617 for a split microphone bottom? René