Product Description Velleman spinning LED wheel kit is a fun and easy to build introductory soldering kit. The 10 LEDs, 2 yellow, 4 green and 4 red are arrayed in a circle on the outer edge of the pcb (printed circuit board). with a push of the "start" button the LEDs will begin flashing sequentially giving the visual effect of a spinning wheel. Gradually the speed of the spinning effect slows and then stops leaving one LED illuminated. A great visual effect that can double as a guessing game to see who can predict which LED stays on. Power supply: 9V battery. Box Contains 1 x Velleman MiniKits Spinning Led Wheel
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