# Wireless Power Transfer (Simple and Fast Way)

I've been searching about this topic for a year to make a simple project. However i found nothing simple. Every project contains hard to find materials and high voltage. I'm trying to make it simpler. I also find a Hungarian site about this project. But i made some changes. Schematic in this site will also help you. http://skory.gylcomp.hu/kapcs/

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## Step 1: Materials...

Materials required;
(I give capacitors by using codes and values)

-  BD139 Transistor                                    /  1
-  5.1 K resistor (all resistors will work)   /  1
-  220n or 224 Capacitor                           /  1
-  4.7n or 472 Capacitor                            /  2
-  1.5pF or 102 Capacitor                          /  1
-  LED                                                            /  1
-  1N4148 Zener Diode                              /  1
-  Jumper wires
-  Cable for Coil
-  9V Battery and Clip

## Step 2: Making Coils

I made coils which have 7.5 and 4.4 cm diameter. Both work very well.How I don't know about numbers of winding. I use 1.5m cable.
Whatever... We need to make 2 coils, one for receiver and another for transmitter circuit. Receiver circuit need normal coil, no splice.
However the coil which is going to attached to the transmitter circuit is different. It needs a wire which is come out at the middle of the coil. This is the most important part otherwise the circuit may not work.

## Step 3: Making the Transmitter Circuit

It's time to make transmitter circuit. I build this into breadboard but you can easily transfer into the perfboard. It's definitely much more steady.

## Step 4: Making the Receiver Circuit

It is much more simpler than the transmitter circuit, so i directly soldered it onto the receiver coil which have 2 outputs.

## Step 5: Result

Now when you add 9V to the rails and put the receiver circuit to the top of the transmitter circuit it should light up. If it's not, check your connections and polarity of diode.

## Step 7: Schematic

There is it ;

Note:I made it simpler this project not belongs to me. Just for entertainment and educational purposes only.
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odij19 days ago

I have done this project and the LED glows without diode :)
but i want to improving this circuit to charge 3.7 volt Li-Ion battery. Could you help me, what can i to do?
I want to me it like an adaptor wireless. Anyone can give me great idea ^,^

MichaelS2029 days ago

what is the output voltage? Need to get 9v. Is this possible?

NAVEENS329 days ago

sir,

i have made it but its not working............................

help plzzzzzzzzzzzzzzzzzz

HezrinHaze2 months ago
Done. :)
A14 (author)  HezrinHaze2 months ago
Well done you done better than me :)
2 months ago

thanks man. i think i made this project the same time as you. got it from the same source you did. lol

2 months ago

This system is working upto how much distance?

2 months ago

the furthest mine went with 9v was 5cm with 50nF capacitor. :)

A14 (author)  SELVAKUMARM2 months ago
max 10-15 cm
markk217 months ago

what is diameter of the both wires?

A14 (author)  markk212 months ago
you can change it but they must be same
anayaka3 months ago

I have done it but its not working

A14 (author)  anayaka2 months ago
be sure to double check your connections(exactly transistor) if you done everything correctly it should work well
tejaswiv2 months ago

which type of cable do we need to use for coil

A14 (author)  tejaswiv2 months ago
just regular stranded cable
HezrinHaze2 months ago
The diodes on the recieving circuit is not necessary and the capacitor increases the recieving range. :)
kirangowda5 months ago

can i use any type of capacitors??

sr910 months ago

i have done the above project and the LED glows. how can i modify the above circuit so that i can glow a 60W bulb (or even a 15W CFL bulb) half meters away ?? how can i modify the above circuit??

8 months ago

hi,
I have done the connection as per the circuit diagram.But LED didnt glow.Can u please help me to make the LED glow?....my id is dharshap@gmail.com.....I want to do it as soon as possible....

hitesh_hirapara8 months ago

this circuit is just enable to on the led..it is not give requried voltage to charge battery...

hitesh_hirapara8 months ago

what is the input resistance of the circuit????

how much watt is requried to operate this circuit??

what should i do to increase the output voltage and current of the circuit???

8 months ago

rply me fast.

shrawan989 months ago
am trying out this project for my science project. I I I made the primary and secondary as explained by you but it just don`t work. I did not use diode in my secondary circuit, is it a must.
A14 (author)  shrawan989 months ago
yes you must need to use diode to make electrons flow in one way
shrawan989 months ago
I made the connection ...but LED didn't glow...can u help me?
A14 (author) 1 year ago
9 months ago

I made the connection ...but LED didn't glow...can u help me?

10 months ago
Hey guys can you help me? I´m on a hurry I don´t know how to make the three output coil for the transmiter. Could you help me by explaining how? My mail is jsvidal99@gmail.com
A14 (author)  svidal210 months ago

Just measure your wire and mark the center of it, strip the insulation and solder another piece of wire then start winding your coil.

10 months ago
Hey guys can you help me? I´m on a hurry and I don´t know how to make the three output coil. Could you help me by explaining how? My mail is jsvidal99@gmail.com
11 months ago
i am trying out this project for my science project. I made the primary and secondary as explained by you but it just don`t work. I did not use diode in my secondary circuit, is it a must.
A14 (author)  Mel00711 months ago
Yes you must need to use diode
Tahir anwar 3210 months ago

plz send me all data about this project also send me function of diode and bd139 transistor and 2 coils at primary side .plzzzzzzzzzzzzz my email id is (Tahir_5050@yahoo.com) on g mail (enggtahir666@gmail )com plzzzzzzzzzzzzzz send

me00410 months ago

instant of 470p cap what can i use

dkols10 months ago

how to make coil with 3 output?

49percentGood1 year ago
I plan on making this over the weekend with my sons. I think this is a great little project, but I do have a question in regards to it. Can you skip the transistor and just supply the 3-part coil with direct AC? If I use my small 9V AC power supply, which would make this much faster & simpler to build because I won't be converting DC to AC, replace the transistor? Or is the transistor essential because it amplifies the current to the coil? I'll probably figure it out on my own, but I thought a quick question or two wouldn't hurt. I also plan on hooking it up to my oscilloscope to see what wave forms I can get and just see what's going on.

Also, and this just came to me, if I use a circular copper pipe and cut, say, 2 to 2.5 cm wide rings, could this substitute the need for coils? My thinking is that if I cut a copper ring about 2 cm or so and drill a hole or two for the diode/cap/LED and solder them to the copper ring, it might work. I'm not sure. But this project sure looks fun & I can't wait to try it out. Thanks for the Instructable! =]
A14 (author)  49percentGood1 year ago
It's great to have a nice comment from you. First of all I used transistor to convert DC to AC so, you can use your 9V AC power source. However I don't know if you can use copper pipes maybe your power source weak for that because pipes have too much resistance, and you can also try your system with 2 part coil.

P.S.= I might be wrong about electronics, so be careful and always make your own decisions.