So @Azalaket asked me to take over a project to build an embedded controller for the dust collection system(s) in the wood shop. The idea is that in addition to the flashing light that folks can ignore, a loud siren will go off when the controller is full and the system will send emails to people Andrew selects to notify them.
A member may then temporarily turn off the siren with the understanding is that they are expected to empty the bin if they do so. An email will go to the same people letting them know who has turned off the siren.
Rather then try to create our own sensor for this system, I decided to modify the existing Oneida-air Dust Sentry system
I reverse engineered the sensor and added an opto coupler circuit (embedded in epoxy) to allow for the embedded system to connect to the sensor with either 5V or 3.3V logic. The full project is being documented on our wiki. So if at any point in the future additional features are required, anyone can perform the upgrades.