High-Quality Air Value Hottest DC12V Four-Way Valve Independent Control Solenoid Valves for Automatic Smart Watering Kit Description： This is a DC12V independent control four-way solenoid valve, which has an inlet and four air outlets, you can individually control the outlet of each outlet, so the outlet can be used alone...
Ultrasonic Levitation Acoustique Electronic DIY Kit Levitator Simple and Affordable TinyLev Portable Acoustic Tractor Un-assembled Description Acoustic levitation is an interesting phenomenon: it takes advantage of the fact that sound waves carry mechanical energy in order to exert force on an object. In this case, that force is directed against...
