How to make the simplest responder?

Full mechanical lever vibrator with interlocking device.

Percussion instruments can be drums or bells, gongs, bells, etc. The percussion arm encircles the sounding instrument, and the fulcrum is in the middle of the lever group. There is an interlocking mechanism between multiple levers, so that the other levers are "locked" after being pressed first, and the sounding instrument can no longer be struck, thus completing the answer.

The traditional answering device only roughly judges the platform number of the player who successfully answers or fouls, and can't display the answering time of each player. Respondents can now use data to illustrate the accuracy and fairness of the ruling results. The game greatly increases the entertainment and is more fair and just.

The circuit of general transponder is complicated, which can only be verified by simulators, application software, computers and other auxiliary equipment. For beginners, it seems a bit overwhelming. The circuit designed below is very simple. As long as you try it according to the picture, you can assemble a simple eight-way responder.