Something fun I did yesterday to my Night Rider EM. This game has the "over the top" feature that sounds a 6 volt buzzer when you roll it over. I decided to amp that up! Being that there is a cop car on the backglass, I thought this idea may be fun.
I have an old motorized coaster style siren off an old Fire Truck. There was just enough room to mount it in the back of the cabinet. To make it work, I used a 6 volt coiled relay to switch a set of contacts for the 12 volts to the siren. Had to add a hurky 12 volt power supply I had hanging around. Wow!!! That is all I can say! The whole neighborhood knows when that game is rolled over, LOL. My wife did not know what I installed. I told her to play it until she could roll it over for a "surprise". Haha, she about shit herself when she finally set it off. Just had to share my crazy Night Rider enhancement.