ESP Conjuring Trick (No. 2)

Many years ago, I designed an electronic ESP Conjuring Trick -- my most popular conjuring design. However, it didn't get past the reputable publishers -- because it tingled the fingers with high voltage. That is, the conjurer was able to tell what was inside a box (any of four objects) by touching studs on the box, which tingled the fingers. The design was repeated in less satisfactory ways -- for instance, codes were sent to the conjurer through optic fibre. Yesterday I applied myself to a redesign -- again based on discerning what is in the box through tactile sense. The basic trick (one object in the box, or not) uses just six components -- and it's inscrutable. It's the "original trick", yet without high voltage. Yesterday I submitted the design to EPE Magazine.