Quite a few questions came in on the last post, about adding sound to your railroad.
The link to buy them?
Kim has kindly given me a better picture, and Barry has also stepped in.
“Hi.Better picture of the sound card.you can see the replacement switch.” — Kim
I read from your latest video that one of your followers users some sort of recording device to trigger his diesel horns.
These pictures are of ones that I used to use to do that same thing. I only have 2 left that I could find. One is intact the other I opened up to show the insides of it. The device has a latching circuit built in so when you push the button to play and release it will continue to play whatever you’ve recorded for up to 20 seconds.
I simply wired in place of the momentary pushbutton switch a magnetic reed switch also shown in the picture. Then I would mount the device with the reed switch near the track and mount a magnet in or under a railroad car to trigger the reed switch. I show a round magnet but I generally used decoupling magnets. It works very well. I have checked to see if Radio Shack still carries the and they don’t.