True 800-Lumen Flashlight
This project is fairly simple, but should use a fairly large housing for good airflow. A good battery should last for a little less than an hour.
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Treasure Finder
Who hasn’t dreamed about owning their own metal detector and searching for buried treasure, or at least a few dropped coins? In this project, we will build a metal detector based on a dual oscillator circuit. One oscillator is fixed, and the other varies depending upon the proximity of metal objects. The beat frequency between […]
