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Idea: On the transmission coils, you could convert it a single one, by running the wire in a figure eight all around. On the receive code, you have it loop the receive coil readings, and shift the the starting point after each send pulse. Also you could put in a fifth smaller receive coil right in the middle.
If you look up "6 inch rack" on Thingiverse, you'll find a lot of miniture racks like this.
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2 x 74x595 will give you 8 7 segment displays.
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Neat, but 480 resolution in 2017?
I was talking about the YouTube video being 480 instead of 720 or 1080.
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Thanks for the clarification! I can't remember of the top of my head if the voltage is 9v or 12v max for the regulator on the Arduino, but would be interesting play with those voltages.
What's the difference of Vin and +5?
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