Regarding trap construction, we are almost stuck using anachronisms for triggering mechanisms. In fact, the rulebook suggests using electricity and electronics to create triggers and noisemakers or lights. Partially this is by necessity, but it can certainly get out of hand. Some traps use a simple (and small) anachronisms like mousetraps, but it can range up to electrical circuits and devices with circuit boards and micro controllers.
A common analog for a pressure plate being those Halloween mats that make spooky sounds when you step on them. They get used as a stand in for a pressure plate which could have existed but uses technology that is completely out of place and far more complicated in some respects. So the question is, how complicated is too complicated? Electricity is in, it's cited and suggested in the rulebook. How about light beam triggers? Photo-sensors? The precedent exists for pressure plates, how about motion detectors or thermal detectors, infrared? Are these too complicated or is trap construction an exception?
A common analog for a pressure plate being those Halloween mats that make spooky sounds when you step on them. They get used as a stand in for a pressure plate which could have existed but uses technology that is completely out of place and far more complicated in some respects. So the question is, how complicated is too complicated? Electricity is in, it's cited and suggested in the rulebook. How about light beam triggers? Photo-sensors? The precedent exists for pressure plates, how about motion detectors or thermal detectors, infrared? Are these too complicated or is trap construction an exception?