Gregory's Server
To debug the relay circuits, I built a Hall-effect sensor to magnetically determine if the relay was activated or not. https://twitter.com/Curious_marc helped me build the sensor and mounted it in a stylish soap dish. The sensor displays the relay status over time on the oscilloscope. 3/8
@kenshirriff I have the same 'scope as this, though my hardware lab is missing a soap dish at all, let alone one as stylish as yours. Clearly I shall need to correct this oversight.