Two part demo for Critical Making
A presentation timer that disconnects the presenter from the projector when time is up. A ‘Desk Clock’ is used to set and start the countdown time, and has a 7 segment display for the countdown. A ‘Wall Servo’ presses the input channel selector located on the whiteboard. When the presentation time has elapsed, the wall servo will toggle the input of the projector. As a demo of wifi networking, the two devices communicate state information through a server.
Magnets attach it to the whiteboard, where it can toggle the button to select the projector input source
Custom PCBs were created for both the wall mounted unit and the table top timer