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Had a small electronics class in high school. Our final project was to take what we learned and build something. I built basically one of these but with a dial that would change the length/pitch of the beep it made. Every 3-5 minutes. I took it and hit it in the drop down ceiling of my French (language) classroom. The teacher pegged me as the prankster after the second beep. Still fun.
This device was one of our main projects to build in our electronics class, all 25 of us built one and then they were pretty much all placed around the school.
Had a small electronics class in high school. Our final project was to take what we learned and build something. I built basically one of these but with a dial that would change the length/pitch of the beep it made. Every 3-5 minutes. I took it and hit it in the drop down ceiling of my French (language) classroom. The teacher pegged me as the prankster after the second beep. Still fun.
That escalated quickly
This device was one of our main projects to build in our electronics class, all 25 of us built one and then they were pretty much all placed around the school.