Paper Segment Display

The decoder device in this puzzle is a piece of paper with holes cut into it that form some or all of the bars in a seven-segment display.

In my example here, I have cut only 6 of the 7 segments as the none of the numbers in the code I am using need that segment.

The other part of this puzzle is the coded pattern.

Neither piece of the puzzle makes sense on its own. But when the template is placed on top of the coded pattern in the correct positions, numbers are revealed.

As can be seen in this example, the correct code is 3594.

When creating the coded pattern make sure there are enough cues for players to know how to align the decoder template on the pattern. The decoder must be placed precisely to reveal the correct number. In the example here, you will see that there are boxes to show where to place the decoder and an arrow to define which way is up on the paper.

The patterns for this example are posted here.

The example here has one decoder number that has to be moved to multiple locations to reveal all the numbers. An alternate approach could be to create a template decoder that has holes for all the numbers together. This would mean that placing the decoder in one spot reveals all numbers. A fun change to this puzzle would be to have the holes in the decoder form one set of numbers, but when applied to the code pattern, a different number is revealed.