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NAV lighting system for RC airplanes | 555 timer IC + NAV LED lights for drones and RC planes | Arduino

Today we are going to create a strobe light for the tips of the wings of an rc airplane using a 555 timer (NE 555 or lm 555 ...
The Verge

MIT’s Droplet and StackAR tools use light to program a timer or Arduino

Droplet and StackAR, developed by MIT’s Media Lab, allow users to set timers or program an Arduino using light-based communication. By pressing the tool against a screen, flashes of light can ...