In addition to what mindslight&#x27;s saying, a schematic should be drawn to make the signal flow as evident as possible, usually from left to right and top to bottom.  Sometimes this isn&#x27;t practical or reasonable, such as when everything&#x27;s hooked up to an 80-pin IC or something like that, but for a project this simple it wouldn&#x27;t have been a problem.<p>This diagram is a dog&#x27;s breakfast.  The draftsperson apparently thought this style would make the circuit easier to construct, and perhaps it does, but their real job was to make the circuit easier to <i>understand</i>, and that definitely didn&#x27;t happen.