Homemade Clock

With all the talk of homemade clocks in the news lately (for example, this video from one of my favorite channels: https://www.youtube.com/watch?v=cNSt1GCVqyU ), I decided to build my own. I might take it to school to show, but only after I get permission from the principal. The motor for it is a synchronous motor that I took out of a 3-way sequencing valve. It turns very slowly at 1/3 rpm, which means it takes three minutes to do one rotation. It doesn't really make a good clock because it spins counterclockwise. The clock hand is a bent blue paperclip. I didn't put any numbers on it, but if I did it would be more of a timer than a clock.

Solar Annoying Device

I designed this device to prevent my parents from leaving the fridge door open. I used a solar garden light and a beeper. There are no other components besides the panel and beeper. This would make a great prank if you left it in a light fixture. When it is placed in the light, it beeps continuously until the light is removed.