I think I've found a solution for avoiding Gordian Knots that can result when tying components from inside a project - TO - the Arduino -OUTSIDE the project-.
What I'm after is a wire harness that's easy to connect pins from components to a male jack on its end, which in turn would plug into a female jack that has pin end wires to go into the Arduino board's female pin jacks. Label the male & female connectors to keep track of which goes with what - and eliminate many of the "continuity challenges" I've encountered when going from Breadboarded Works to Kludged wiring in an "installed" set up - that DOES NOT work.
I'd been thinking in terms of computer/electronics stuff - crimp on 10 pins, male:female, male:male pin connectors - and the like. So I'm thinking Four Wire and maybe 5 or 6 Wire - separate colors for each wire to avoid OOPS.
Phone Wires & Jacks. Ubiquitous - most hardware stores carry all sorts of phone cables, plugs and jacks. They come in 4 Wire Handset, 4 Wire Phone To Wall Outlet, 6 Wire - and CAT 5 cables and connectors are easy to find as well.
So my question is:
Will 24 gauge wire handle the currents drawn by LEDs, PIRs, small motors and maybe small servos?
(Tired of Kludging and want neat, clean - as close to Idiot Proof - ways to connect Stuff to the Arduino 2009 once all the protyping and programmig is done)