Nightbreeze DIY Hand Crank Generator Contains Ball Bearings LED Beads Small Manual Generator No Load DC Voltage 1-12V Physics Teacher's Gift Science Education Experiment for Home School
To make this little hand generator more durable and improve its power generation efficiency, we use two ball bearings, and apply lubricating grease.
A kit contains one hand generator, three LED light beads, and clip cord. The generator is perfect for teaching power generation tests in physics class. It can be used for almost any experiment that requires 1 to 12 volts DC. No battery required. Convert mechanical energy into electrical energy by turning the handle of the generator by hand. (Watch the video for details)
Simply by gently turning the handle with your finger, the power generated from this hand generator can lighten the LED to high brightness. And the sound of the turning gears is rather soft.
With this hand generator, you can DIY fun lighting tools, or power some equipment of small power and low voltage.
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