Hello all. I'm part of a group applying for a grant to activate a public space. The design that we've come up with involves six old payphone booths. As people pass by the phones or open the door to one of the booths, they will ring. When the receiver gets picked up the phone will play a pre-recorde…

Hacking old payphones

ChrisTenone February 11, 2018, 7:06am 9

I've used PIR detectors, you put them inside of a toilet paper roll, and then they are directional, and much attenuated. Five, maybe six feet max.

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