Ok so the idea is to make Redstone contraptions more compact but still effective.
Make a Circuit Board that has a 9x9 (or bigger) crafting space in it that lets you place redstone dust/torches/repeaters inside it and have them operate normally. There can be output squares on 2 sides of the crafting space that send the current out, as well as input squares that take current in. The actual circuit board block should have the input and output sides marked.
applications of the circuit board idea:
*making adding machines more compact
*making machine memory compact