Same step format as a Community Build: look, do, check, fix. The difference is that a redstone build either works or it does not, so every guide ends with a test you can run yourself.
Redstone is hidden under floors and behind walls, so these guides show one flat layer at a time, from the bottom up, instead of a front view.
The check at the end of a redstone step is an action: flick the lever, and the lamp comes on. If nothing happens, the fix box names the two blocks that are usually wrong.
A 16×16 plot, about half an hour, and a machine that gets bigger the more people join in. Four cells work perfectly well on their own; forty make an industry.