Tell us about yourself!
Actually, you can charge even with 19V laptop charger if you add lighbulb.
You can use a 12V light bulb if you don't have a DC to DC converter.
DIY Drill in a few minutes
Nice idea! I have similar, mini PCB Drill without a chuck :)
DIY Heated Office Chair
Inspired by your idea I made Homemade DIY Speaker using Plastic bottle
I made it!
Maybe someone will be interested in:DIY levitation device with two transistors and hall effect sensor
My DIY levitation device, with two transistors:
My DIY Alarm Siren, without additional components using only a Speaker
My Simplest DC Noise Making Device without additional components using just a Speaker: