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You can download the user manual from:

User Manual (PDF)

Overview:

1. Introduction:

This is the OSOYOO Ultrasonic Levitation DIY Kit — a hands-on soldering practice project.

It will help you practice soldering skills, become familiar with a variety of electronic components, and deliver a dynamic result. When the circuit is assembled and soldered correctly, the LED will light up and four balls will levitate.

2. Working Principle:

Ultrasonic standing-wave levitation works by maintaining a precise gap between the ultrasonic transmitter and the reflector (or a second transmitter). This gap — called the resonant cavity distance — causes the transmitted and reflected waves to overlap continuously and form a standing wave. The acoustic-radiation force at the standing-wave nodes overcomes gravity and keeps objects suspended in mid-air.

3. Parameters:

1>. Item name: Ultrasonic Levitation DIY Kit (Soldering Practice)

2>. Working voltage: DC 12V

3>. Diameter of suspended objects: 2–3 mm

4>. Size (assembled): 44×40×66 mm

4. Notes:

1> Only light, small objects can be suspended — heavier objects cannot levitate.

2>. The ultrasonic transducers are sensitive to vibration. Avoid dropping or bumping them. After soldering the transducers, do not cut off any excess metal pins.

3>. Because the levitated objects are very light, air currents can disturb them. Place the assembled kit in a calm, draft-free location.

5. Schematic Diagram:

OSOYOO Ultrasonic Levitation DIY Kit schematic diagram

6. Component List:
OSOYOO Ultrasonic Levitation Kit component list part 1OSOYOO Ultrasonic Levitation Kit component list part 2

PCB ASSEMBLY:

Step 1: Mount TC IC (TC4427) on U2.
1.1) Make sure the notch on the IC faces the same direction as the marking on the PCB. (Note: Pay close attention to IC orientation.)
Mount TC4427 IC on PCB — step 1.1

1.2) Select a solder pad on the PCB, then apply solder to the pads.
Apply solder to PCB pads — step 1.2

1.3) Use tweezers to position the IC (TC4427) on the pads and hold it in place. Touch the soldering iron to one leg to melt the solder and tack the IC down.
Place TC4427 IC with tweezers — step 1.31.4) Solder the remaining legs of the IC (TC4427).

Solder all legs of TC4427 — step 1.4

Step 2: Mount STC IC (STC15F) on U1 using the same method.

Make sure the dot on the IC faces the same direction as the marking on the PCB.
Mount STC15F IC on U1 — step 2a
Solder STC15F IC on U1 — step 2b

Step 3: Mount IC (AMS1117) on U3 using the same method.
Mount AMS1117 voltage regulator on U3 — step 3

Step 4: Mount two 100 nF ceramic capacitors on C1 and C2.
Solder and trim the excess leads.
Mount 100nF ceramic capacitors on C1 and C2 — step 4

Step 5: Mount a 100 µF electrolytic capacitor on C3.
100uF electrolytic capacitor polarity guide

(Note: Electrolytic capacitors are polarized. Be sure to insert the positive (+) lead into the hole marked (+) on the PCB.)

Warning: Connecting the capacitor with incorrect polarity can cause it to heat up, leak, or explode.

Solder and trim the excess leads.

Mount 100uF electrolytic capacitor on C3 — step 5a
Solder 100uF capacitor — step 5b

Step 6: Mount a resistor on R1.

Solder and trim the excess leads.
Mount resistor on R1 — step 6

Step 7: Mount the power socket on J1 and solder.
Mount power socket on J1 — step 7

Step 8: Mount a red LED on the other side of the PCB.
(Note: LEDs are polarized. Be sure to insert the positive (+) lead into the hole marked (+) on the PCB.)
Solder and trim the excess leads.
Mount red LED on PCB — step 8Step 9: Mount an ultrasonic transducer on the main PCB.

Note: The ultrasonic transducer has two pins. The pin with a black circle around it is the positive (+) leg — insert it into the hole marked (+) on the PCB.
Solder and keep the metal pins.
Mount ultrasonic transducer on main PCB — step 9a
Solder ultrasonic transducer — step 9b
Step 10: Mount the second ultrasonic transducer on the top PCB.
Solder and keep the metal pins.
Mount second ultrasonic transducer on top PCB — step 10

Step 11: Secure M2×17mm copper pillars to the main PCB using M2 screws.
Fix copper pillars to main PCB — step 11

Step 12: Connect the M2×17mm copper pillar to the M2×30+3mm copper pillar screw to form a single copper standoff.
Join copper pillars to form standoff — step 12
Step 13: Secure the top PCB to the main PCB using the 2 copper standoffs from the previous step and 4 M2 screws.

(Make sure the positive electrodes of both PCBs face each other.)

Fix top PCB to main PCB — step 13a
Assembled kit — step 13b

Step 14: Operation
After completing assembly, review all solder joints and verify that every component is seated correctly. If everything looks good, connect the USB cable — the LED will light up. Use tweezers to position the included foam balls in the levitation zone.

Enjoy the science — make the foam balls float!

Note: The included USB cable boosts 5V to 12V and can be connected directly to a computer USB port to power the kit.

Safety Precautions:

Like all electrical devices, this kit must be handled with care. The soldering iron tip can reach high temperatures — please follow these safety rules:
⊙ Keep this kit out of reach of children.
⊙ Keep flammable materials away from the soldering iron.
⊙ Do not cool the iron by dipping it in any liquid or water.
⊙ Work in a well-ventilated area.