When you receive this kit you will get 2 PCBs, 4 coils and 12 small neodymium magnets, 1 big magnet and a lot of plastic bags with all of the components. Each bag has labels and on the PCBs we have the silklayer with the name and value of each component so mounting this is just follow the components. So you have to check the value on the PCB, search that component in the bags and solder that. We need 2 PCBs because on one we will have the components and on the other we have the coils and magnets that will keep the big magnet in the air.

• Levitator Kit - Link Es.aliexpress.com

Before we sodler the parts, have in mind that there are some components that have no mark of which is the front side but have in mind that usually the squared pad represents the first pin of that component. So, just look at the pad, check the component online to see which is the first pin and then solder that. SO, I first solder the two LM234 OPAMPs.

A. Bottom PCB

So we have soldered those two LM324 amplifiers. Then I solder the small amplifier as well, the LM393. After that I solder the voltage refference and voltage regulators 78L05ML and the TL431 refference. For these two components look at the squared pad for the first pin and make sure you don't solder it backwards. Now I can start soldering all the resistors. These are all trough-hole. Just look at the value marked on to the PCB, search that resistor in the plastic bags and place that on the PCB. Then I flip the board and solder all resistors.

After I add the resistors I can place the capacitors. Becareful with the polarized caps and not put those backwards. We also have 2 non-polarized capacitors 100nF. Then we can add all the diodes including that small LED. We add te two potentiometers, the DC connector and finally we add the BJT transistors. We have a total of 9 transistors. We add the small male pins and the PCB is ready. All the components are palced on the top side of the PCB except the male pins. These male pins will be used to connect this PCB with the bottom PCB.

B. TOP PCB

Now that we have the bottom PCB, we start with the second board. Now is very important to palce the hall sensors in the correct position. But first, for that, we need to place the coils. So add the screw on the bottom side and the screw in place each coil with the wires on the top side. We have one end of the wire in the middle of the coil and one on the side of the coil. Once we haev the coils palced we can add the hall sensors because now we know the height of the coils and that's important.

Ok, now we have to bend one hall sensor 90 degrees wiht the front part facing upwards. Then we solder that on the H3 pads at the height of the coils as you can see in the pictures. Then we solder the other two hall sensors with 90 degrees in beterrn one each other and at the height of the middle of the coils more or less. See the pictures for more details. And taht's it. Not we can solder the wires from the coils.

Now you have to solder the wires from the coils. The wire that is coming out from the middle of the coil will go to the X or Y pad. Have in mind we have to connect X1 with Y1 and X2 with Y2. Then solder the wires from the side of the coils to the other two pads and make the connections. Finally we add the magnets, 3 for each pack using the given screws and the board is ready. Both boards are ready.

Now I connect both parts together. Then I connect some wires and apply 12V at the input and also add the jumpers for those male pins. Now the module is powered on but you will see that the LED will turn on only when it detects the levitation magnet. So, put close in the center the big magnet and you will see it will stay in the air. If the magnetic force will push that to the sides, just use the potentiometers to adjust the gain for the X or Y axis and by that center the magnet better. It's so awesome to see the magnet floating in the air. So, the kit works with no problems. You might need to adjust the potentiometers and the position of the hall sensors to be perfectly aligned. The circuits works quite well. All is done in an analog way. There are no microcontrollers. The signal from the Hall sensors is amplified with the OPAMPs and then applied to the transistors. If the magnet is too much to the left, the sensor detects that, gets amplified and increases the magnetic field inside the left coil so the magnet gets pushed back to the center and so on... But now let's get the circuit.

I get the PCB and start testing each pad for connections. After hours of routeing, I finally had the entire circuit. You can download that from below and also get tge GERBER files for the PCB or see the EasyEDA project if you need to make your own board and give it the shape you want. The scheamtic is a bit chaotic but coul be understood. For the PCB I've made it in the same round shape and with the same size as the kit PCB. You need both PCBs to complete the kit and you could get them both from below.

Below you have the schematic for the components PCB. Follow all the values on the schematic and solder those to the PCB. You also have the EasyEDA project below if you want to make a copy and make your own board. I hope this circuit will help you. On the EasyEDA project you have both schematics and PCBs.

Link: https://easyeda.com/editor#id=|a47d47840f244e47b56c510c37df1964|4567921cb418473e8d472b019fc59885|735807f2648e4958af17674cf08fd6f9

I get the PCB and start testing each pad for connections. After hours of routeing, I finally had the entire circuit. You can download that from below and also get tge GERBER files for the PCB or see the EasyEDA project if you need to make your own board and give it the shape you want. The scheamtic is a bit chaotic but coul be understood. For the PCB I've made it in the same round shape and with the same size as the kit PCB. You need both PCBs to complete the kit and you could get them both from below.