duration 3 hours
Make your own holiday countdown calendar!
1. LED Board x3
2. Battery Board x3
3. Coincell x3
4. Conductive tape
7. Color Paper
Print out 2 pages of the house template, 2 pages of the base board template, 2 pages of the track template, 1 page of the sled template, and 1 page of the sled template. Glue template onto a piece of cardboard. Cut the pieces out along the solid cutline, score along the dashed lines and bend or fold accordingly.
Glue up the sled and attach the bottom rails. Stick a piece of the conductive tape at the shaded strip in between the two rails.
Tape battery board onto the shaded area with its shape. Arrange the conductive tapes as shown and the glue tracks onto the shaded area of the base board.
Glue up the house as shown according to the mark on the base board, leaving one side of it open. Attach the star LED board to the cutout.
Cut the excess of the 2 pieces of conductive tape and attach one to the negative of the battery board and the other to the negative of the star LED board.
Attach a short piece of conductive tape between the positive of the battery board and the positive of the star LED board as shown.
Glue the other side of house on. Insert the coincell and test the circuit with the sled. The strip of conductive tape on the sled in between two tracks will function as a switch for the circuit.
Repeat steps 3-7 for two other houses and decorate with colored paper.