# Arduino Wireless Power POV Display

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When I first met this little device, I liked it immediately. I decided to make my own POV. I watched lot of videos, and recognised some main problems. The power supplying of the micro-controller was the biggest. Spinning battery or sliding commutators were both refused. Only option was the air core coil for me. That solution seemed too difficult. I could manage to solve this problem successfully. I created an easy but relatively efficient circuit with a few electronic parts.

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## Step 1: Schematic Diagram

The schematic diagram

## Step 2: Components You Need:

4. 7 pcs 220 ohm resistors 0805 or 1206

6. 2 pcs 4.7 nF capacitor 4.7 nF 1206

8. 1 pc 1...4.7 uF capacitor 1 uF 1206

9. 2 meters 24 AWG ( 0.51 mm) magnet wire

10. 1 pc 1.5 nF capacitor 1.5 nF 1206

11. 1 pc BCX 56 transistor ( I tried BC 639, BC 368, worked well) BCX56

12. 1 pc 4.7k resistor 4.7k 1206

13. The motor and some other parts are from and old CD player. Or new motor with disc holder

14. 5V power supply,( USB charger or power bank).

## Step 3: The Heart of This Project : Coils.

There is a simple coil in the receiver side and a bifilar coil in the transmitter side. The secret is that they have to have same size and same number of turns. In my coils this number is 8. The little trick in the bifilar coil is that coil consists two coils with 4 turns. It is not difficult to make. The preparation process same as in the single coil.

I used 24 AWG ( 0.51 mm) magnet wire for winding coil. 8 turns , 35 mm diameter.

As you can see in the picture we have 4 wires in the bifilar coil and we need a common point. Two of them will be connected to each other that point will be the common point. There are two options. 1. connect red start to blue end. Or : 2. connect blue start to red end.That's all. I am not too good at explaining things, but hope, you understood.

The software:

## Step 6: Building Transmitter

It requires some soldering skills. I will make a version with bigger through hole parts.

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## 90 Discussions

Hello.
I like the design please, give me a detailed diagram of diode and clock connections for arduino.
greetings

I want to make the coil that the output voltage is 12vdc, please guide me

I look forward to you with more detailed instructions on the coil, how the welding parts are, there are many I look unclear. If you can make a video, it's great. thank you

tôi rất mê đồng hồ, tôi là người Việt Nam, tôi xẽ làm, nếu có thắc mắc tôi liên hệ với bạn theo đó chỉ nao?

hi, is the schematic from above complete? or is there a missing component. if there's missing can you please tell me what is it.. and for all the capacitors can i use ceramic type? because i dont have tantalum capacitors at the moment..thank you in advanced

Hi S13, yes it's complete, although you could need a 47 Ohms resistor (or close) in series with the motor to reduce its speed and vibrations ... and yes, you shouldn't have problems with ceramic capacitors instead of tantalum. Good luck!

Ok now I see your coil winding technique. Really nice work on the coil winding. I have been trying to wind mine for inductive power transfer and mine so far have been the bad example for the 'Nailed It' meme. I'll keep trying because thanks to you i see it possible. Thanks.

Hello again holybaf. Finally I finished it (the beta version of course) but when starting the mechanism, the dc motor takes a lot of speed, making everything vibrate too much. Have you used something to reduce the motor speed ? What should I adjust in the source code to synchronize the texts according to the motor speed?. Thanks again.

Hello, 47 ohm resistor serial with the motor decreased speed properly for me. Find the line in the code: int timer = 200 ; and set it 170 or less if the speed is high.

The next project: POV with IR data transmission. Coming soon.

Hi again!

I have another some questions, the first one is about the RTC module, it comes with a small battery to keep the clock running when there is no external voltage (I guess), is there any reason why you have removed it? (I don't see it in the pictures)

The second one, is about the LEDs, do you have any picture of the solder between the LEDs and their resistors?

Another one, what glue did you use to keep the coil attached?

Finaly, do you have any recommendation to make a correct balancing of the upper disc?

Thanks a lot for you support!

See you, William

PS: Take a look at the small PCBs inspired by your design.

Hi,

This kind of battery is not rechargeable and I had a discharged one. I wanted to use a rechargeable coin cell battery and place it on the surface of disc as a balance weight. After that I re-thought the design and dropped that idea. Of course you can use small battery for continuous working. I used cyanoacrylate super glue for coils. I balanced the disc with a holed coin. I will upload photos about of resistors on back of LED's.

I liked your design! Well done!

Hi Mr.Holybaf. Very nice project, congrats and thanks for your patience. I have a question, I don't what it's the SMD component conected at transistor emitter pin, looks like a Tantalum Capacitor, but no appear in the Schematic Diagram. Thanks 4 u time.

PD:By the way, I'll be waiting for the mini POV with IR data transmission.