Hedgehog Spotter

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Automatically classify hedgehogs from images acquired, tweet them, add them to a website with googlemaps

neil-k-sheridan

Neil K. Sheridan

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Circuits needed
11/08/2017 at 21:10 • 0 comments

Ok, so we need the following:
PIR circuit: that's just send 5v, and returns high/low to input
Light sensor: that's just send 5v, and returns high/low to input
IR illumination: we switch this by sending high/low from an output. Since it is 12v, and the Pi is 5v we use optocoupler (e.g. Isocom 4N25 DC Input Transistor Output Optocoupler, Through Hole, 6-Pin PDIP £0.20) , and we need transistor too.

Can we put all these onto a HAT? I guess so!
We also need a stepdown circuit for the 12v battery to 5v for the Pi. Can we put this on the HAT too? Like AmpZero did, so we power the Pi via GPIO.