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As a biomedical equipment technician [Adam Outler] equipment needs to be in top working condition. The emergency room staff were complaining about erroneous noise on the electrocardiogram and it ...
Professional equipment is often very expensive, but building an EMF detector yourself is not even that difficult: just take a look at Arduino expert [Mirko Pavleski]’s convenient hand-held ...
One of the essential parts of any home security system is a door detector that lets you know ... The system here uses a cheap Arduino board, a few sensors, and a magnetic contact switch.