Adding a sound board to a K-Line Diesel

It's a standard 2.54mm pin spacing dual row header- standard electronics part for DIY.

Again, just remember, the diagram posted above is for the backside of the PCB. So when plugging into the header, you have to flip that diagram to match. In fact, I just generally cheat, no connector, and solder to the spots on the back of the board. It's only 4 wires, 2 speaker, 2 for power, one pair of pins jumpered for max volume.

Failed to answer your speaker request. https://www.amazon.com/CQRobot...ojects/dp/B0738NLFTG

or, in a really small chassis space https://www.amazon.com/MakerHa...rating/dp/B07GJ4GH67

Thanks, Vernon.  I got the board idea from one of your older posts.  And that smaller speaker gives me an idea.

Here's some pics showing the upgrades (speaker, basic soundboard, original bulbs to LED, Christmas lights) I did to the one I had a few years ago if it helps any.

Video of it running with Christmas lights:

https://www.youtube.com/watch?v=tooBcSl8EHg

Are there different connections for steam vs. diesel?  I ordered two diesel boards from Lionel and hooked one up and got a steam whistle and bell.   I contacted Lionel and they sent me two new boards and I hooked one up today and got a STEAM whistle again!   Do these boards have any identifying numbers on them to tell steam from diesel? How frustrating!

Thanks for any help, Dale

Some of these old boards I don't believe Lionel knows what they have.  Some the identical looking older parts seem to be in one bin with no identification.

Case in point.

I ordered a bunch of the AD-20A boards.  There are three types, one for diesel flashing ditch lights, one for steam IR tender connections for couplers & backup light, and one mystery board that nobody seems to know what it does.  The three different software loads have three different colored dots on the uP chip, silver, red, and green.

Steam is silver, diesel is red, and green is a mystery chip.  I have a test rig, and I couldn't figure out any sane function for the ones with the green dots.

I ordered some of the steam ones, and I got mostly green mystery function boards and a couple of diesel boards.  I had to send them back twice and educate the order taker on what the colored dots mean.

I'd bet money and give you odds that information didn't survive past my replacement order and they're back to random shipments again!