The GPRino is a $300 ground penetrating radar
https://blog.arduino.cc/2020/11/09/the-gprino-is-a-300-ground-penetrating-radar/?fbclid=IwAR0IkOFW2gGeiQXJhBJ3O3KDSkYwUuvogSFLxq0n UIguYb6CAOgcNgy4oTQ
https://blog.arduino.cc/2020/11/09/the-gprino-is-a-300-ground-penetrating-radar/?fbclid=IwAR0IkOFW2gGeiQXJhBJ3O3KDSkYwUuvogSFLxq0n UIguYb6CAOgcNgy4oTQ
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