Gravitrax Solenoid Cannon
thingiverse
Here is another electric Gravitrax compatible marble lift that's based on a small and inexpensive solenoid. To see it in action and learn how to build it, check out this video: https://www.youtube.com/watch?v=TALEQpV4ri8 You can find the solenoid at these retailers: * Adafruit: https://www.adafruit.com/product/2776 * Kjell: https://www.kjell.com/no/produkter/elektro-og-verktoy/utviklerkit/arduino/tilbehor/mini-solenoid-p88216 Other vendors carry this small solenoid as well, so search Google for "5V mini solenoid" to find one near you.
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