<p>This levitator runs at a frequency of 40KHZ in the air, and can capture light objects with a density diameter of 2-3MM, such as foam balls, ants and other small objects, which are suspended stably in the air for a long time, and the mainboard is slightly heated.</p> <p>The circuit is mainly composed of 1 single-chip microcomputer, 1 driver chip and 2 ultrasonic transmitter heads. It is mainly used to learn about ultrasonic standing wave suspension.</p> <p>Working principle: Ultrasonic standing wave suspension is through the ultrasonic transmitter and the transmitter (or another transmitter) There is a certain distance (called the resonant cavity distance), the transmission wave and the reflected wave (or another sound wave) are constantly superimposed, and finally a standing wave is formed. The sound wave force on the object at the standing wave node overcomes the and finally achieves the effect of suspension.</p> <p>How to play: Clamp the small foam ball with tweezers, and gently place the foam ball between the two ultrasonic probes, and the foam ball will suspend.</p> <p>Product parameters:</p> <p>Power input: DC 5V (0.5-1A)</p> <p>Note: Different batches may have different appearance\/color of electronic components, which does not affect use.</p> <p>Colour: Black</p> <p>Material: PCB+Electronic Components</p> <p>Package Contents:</p> <p>1 * finished Ultrasonic Levitator</p> <p>1 * USB cable</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>