Hello, and thank you for your time!
My brother and I are building spooky puzzles for kids to solve during a Haunted House Activity. And one idea we have involves using littleBits! But I just don’t know how yet!
We want to have a chessboard, and picture of two ghosts playing chess above it. As the kids do activities throughout the haunted room they win chess pieces, if they’re really clever, and place their chess pieces on the chessboard so that it matches the picture - a secret door pops open!
The basic idea is when the chess pieces are placed on the chessboard, it completes a circuit and this signals a servo to unlock a secret door.
The secret door is a challenge for another time! Right now I’m trying to figure out how to hide a circuit in a chessboard!
One idea we have is sticking two pins through a few squares of a wood/cork chessboard, and painting the bottoms of the chess pieces with conductive paint. On the bottom of the chessboard is a circuit that has gaps where the pins are. By placing the chess pieces over all the squares that contain the two pins, the circuit is completed!
The only thing we don’t like about this idea is the pins will likely be visible on the board in order to make contact with the chess pieces, slightly ruining the effect.
My brother had the idea of using magnets on the bottom of the chess pieces. and under the board having magnetic coins/washers inside short plastic guiding tubes. When a magnetic chess piece contacts the board, it’s proximity sends the washer up the tube and into contact with the circuit. This means no contact pins showing through, but takes a little more setting up. Still, I like that it feels less mechanical, and more haunted!
Does anyone else have any other ideas on how to discreetly hide a circuit in a chessboard? My brother and I are entirely inexperienced with this sort of thing, and any suggestions/ideas would be greatly appreciated!