Out of a combination of time and budget concerns, I decided to build three sensors units, and have the rest linked as slaves. I then moved to circuit production and building a scaffold from which to hang it:
The final circuit layout had some interesting gremlins of its own. I had rigorously tested the function of the circuit on an individual basis, however, when grouped together they began to interact in a very strange manner. Instead of each circuit functioning as it should, they began to alter their timing / fail to function when the other circuits were activated. Essentially if one was triggered while the other two were 'open' the one of them would kick off. This resulted in a much faster turnover in the sensor function. I suspect that this effect was caused by a cannibalism of current from the limited wall source.
Overall I was actually pleased with this development, as it seemed that the sensors were actually having a conversation - this paired with the clicking of the relays and the LEDs contained within the circuits made for quite a spectacle.
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