DIY water dispenser technology small production small invention scientific experiment manual model toy environmental protection student small production
Since the PVC pipe is cut manually, there will be flaws in the cut, which cannot be avoided, and the perfect ones should be taken with caution!
The color of PVC water pipe is white, blue, gray, random color
Shipped as parts
Need to bring 1 cup
working principle:
The water cup touches the micro switch, the circuit is connected, and the water pump works
The water cup leaves the micro switch, the circuit is disconnected, and the pump stops working
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