Control it with your smartphone and view the underwater scenery through a browser. A sci-fi dream realized with an ESP32 and a 3D printer. The ESP-FLY featured in the previous [Kato RC #29] was a $30 ...
Tony Goacher] has worked with a lot of cheap brushless DC motor controllers built in China. They can be very cost-effective, ...
The Joule Thief Circuit is a simple and clever electronic design that can power an LED using a nearly dead battery.
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