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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 IC) this circuit is very easy to make with few components and most ...
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 ...