Presentation Timer (1 of 2) // Desk Clock
22 Feb 2016

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.

Part 2 (wall mounted servo)

stock materials

front view Front view of the timer.

wire routing

Wire routing for the various components

wooden knob

Final dial, milled out of walnut with a radial finishing pass for a smoother taper