After some thought..i might add…ON the “SENDING” end of this..a “gun” will send a IR pulse to the target end. This would be best if it could count shots as you described. ie..coin goes into slot, starts or triggers Art Controller, gun with IR is activated powered up, trigger shoots say…30 shots of IR at targets, then turns controller off until the next time coin receptor triggers the controller…BUT having said that…i would settle for an amount of TIME allotted  for shooting via the controller if thats the best i can do, but would rather have shots counted down on a display.   So either way im happy with what i think i can do with the Art controller, but im an artist, tinkerer, sculpture, inventive type with some,,,but not a whole lot of logic level electronics experience, but willing to learn, if you have any direction you would like to point me in or advice im all ears..and thanks again.!