This may be difficult to explain. Last year I replaced the Horseshoe Slider Switches on my Disco Fever drop targets with reed switches. They worked very well – still working today. Now I want to do the same thing on my Blackout. The Disco Fever was easy because only the bottom contacts on the slider board were used. The CPU could figure out when all were down and reset. The Blackout has momentary contacts half way down and contacts on the bottom. (see first photo)
The bottom contacts are wired in series so when they all make contact the bank will reset. (see schematic)
I have a few concerns with this arrangement. I’m not sure the reed switches are fast enough to register when the magnet passes by. On the other hand the magnet may be too strong and hold in the upper reed closed when it's in the down position.
One option would be to lower the upper switch to insure it registers but then it would be always closed when the target it down. The question is what would happen if switches 25, 26 or 27 were held closed? Would it keep scoring? Would it short something? Would it burn out a transistor or something?
Looking at the Disco Fever diagram when the target is down the switch is closed. That doesn't seem to effect anything. Wouldn't the same thing happen on the Blackout?