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Wirelessly power your iDevices!
Wow, I'm really surprised at how many views this is getting! Thank you everyone for reading!
I recently made a boost converter (for those unfamiliar with them, they effectively boost the voltage up to a useable amount) to make a USB Ipod charger using 2 AA batteries.
Now that that was done and over, tested tried and true, I decided I wanted to make something a little more snazzy!
Video:
http://www.youtube.com/watch?v=MDSYJowwFWM
Behold, the wireless ipod charger!
Uses all 12 volts of 6 (2 in parallel for each cell) lithium batteries!
Draws under 3 amps all the time!
Perfect for kids parties!
Now in 5 new flavors!
I've searched around on this website, and noticed that almost all of the instructables on here with wireless power seem to lack a proper explanation about how to build one; Or, when they did build one, they used an inefficient method of doing so...
This transmitter works fantastic, and can run on pretty much any voltage above 12 volts, and below 24! It's also extremely efficient (little power lost) and, it generates almost no interference. (one wireless power instructable used a square wave in the primary; Square waves have a lot of harmonics, and can cause havoc on computer systems, radios, and other sensitive electronics)
I've come to solve all of these problems!
Wow, I'm really surprised at how many views this is getting! Thank you everyone for reading!
I recently made a boost converter (for those unfamiliar with them, they effectively boost the voltage up to a useable amount) to make a USB Ipod charger using 2 AA batteries.
Now that that was done and over, tested tried and true, I decided I wanted to make something a little more snazzy!
Video:
http://www.youtube.com/watch?v=MDSYJowwFWM
Behold, the wireless ipod charger!
Uses all 12 volts of 6 (2 in parallel for each cell) lithium batteries!
Draws under 3 amps all the time!
Perfect for kids parties!
Now in 5 new flavors!
I've searched around on this website, and noticed that almost all of the instructables on here with wireless power seem to lack a proper explanation about how to build one; Or, when they did build one, they used an inefficient method of doing so...
This transmitter works fantastic, and can run on pretty much any voltage above 12 volts, and below 24! It's also extremely efficient (little power lost) and, it generates almost no interference. (one wireless power instructable used a square wave in the primary; Square waves have a lot of harmonics, and can cause havoc on computer systems, radios, and other sensitive electronics)
I've come to solve all of these problems!
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Signing UpStep 1So you want to make it, right?
You'll need some parts.
2 MOSFETS - I understand that this is a rather vague statement. You can use the IRFP250, if you want to. However, the lower the on-state resistance is, the less heat will be generated. You can get these from any ol electronics supplier. Farnell, mouser, digikey, ebay
2 10k ohm resistors. (brown black orange) You can use 1/4 watt ones. Again, you can get these at the listed ones above, and even radioshack should have these.
2 Ultrafast Diodes - They need to be above 400 volts. I used UF4007's. Farnell, Mouser, Digikey, ebay...
2 Twelve volt zener diodes - Nothing special to say here! Again, Farnell, Mouser, and Digikey.
1 7805 - I know I said I used a boost converter. However, a boost converter is a whole another instructable, and I can't explain how to build one in this. So, for now, we'll just use a 7805. Radioshack has these in addition to the places listed before!
2 18k ohm resistors - 1/4 watt (brown - gray - orange) Radioshack, and the listed places.
2 12k ohm resistors - 1/4 watt (brown - red - orange) " "
1 Ferrite toroid - it can be around 1/2 inch in diameter. Wind roughly 30 turns of enameled wire on it, and you'll be set! You can get these from old Tube televisions scrapped, ATX PSU's. Basically anything you can take apart *should* have one of these.
USB Female Port - I scavenged mine from an old adapter PCI board we had from 2000. We didn't need it, so I figured why not? If you don't know where to get one, you should be able to get them from Mouser, Digikey, Farnell, and ebay.
Two sets of tank capacitors - I used 4 1 uF capacitors for mine. You can use two 2 uF capacitors instead, if you want to. You NEED to make sure they're MKP, or a better type! Polyester ones, electrolytics, anything along those lines will not work, and will overheat! WIMA makes some nice capacitors that work fantastic for this project. You can alternatively use Farnell, Digikey, or Mouser to find some MKP capacitors to use. Ebay will have some too.
You'll also need some 14 gauge wire, and tape!
2 MOSFETS - I understand that this is a rather vague statement. You can use the IRFP250, if you want to. However, the lower the on-state resistance is, the less heat will be generated. You can get these from any ol electronics supplier. Farnell, mouser, digikey, ebay
2 10k ohm resistors. (brown black orange) You can use 1/4 watt ones. Again, you can get these at the listed ones above, and even radioshack should have these.
2 Ultrafast Diodes - They need to be above 400 volts. I used UF4007's. Farnell, Mouser, Digikey, ebay...
2 Twelve volt zener diodes - Nothing special to say here! Again, Farnell, Mouser, and Digikey.
1 7805 - I know I said I used a boost converter. However, a boost converter is a whole another instructable, and I can't explain how to build one in this. So, for now, we'll just use a 7805. Radioshack has these in addition to the places listed before!
2 18k ohm resistors - 1/4 watt (brown - gray - orange) Radioshack, and the listed places.
2 12k ohm resistors - 1/4 watt (brown - red - orange) " "
1 Ferrite toroid - it can be around 1/2 inch in diameter. Wind roughly 30 turns of enameled wire on it, and you'll be set! You can get these from old Tube televisions scrapped, ATX PSU's. Basically anything you can take apart *should* have one of these.
USB Female Port - I scavenged mine from an old adapter PCI board we had from 2000. We didn't need it, so I figured why not? If you don't know where to get one, you should be able to get them from Mouser, Digikey, Farnell, and ebay.
Two sets of tank capacitors - I used 4 1 uF capacitors for mine. You can use two 2 uF capacitors instead, if you want to. You NEED to make sure they're MKP, or a better type! Polyester ones, electrolytics, anything along those lines will not work, and will overheat! WIMA makes some nice capacitors that work fantastic for this project. You can alternatively use Farnell, Digikey, or Mouser to find some MKP capacitors to use. Ebay will have some too.
You'll also need some 14 gauge wire, and tape!
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It's right here. I linked it above, but, I suppose it's sort of easy to skim over.
Enjoy!
However, you should give the original creator of the transmitting circuit credit.
This circuit was originally used for driving flyback circuits.
This is the ZVS flyback driver circuit created by Vladimir Mazzilli way back when.
http://uzzors2k.4hv.org/projectfiles/flybacktransformerdrivers/Mazzilli%20ZVS%20Flyback%20Driver.png
Something Apple did to make more money I guess.
http://www.instructables.com/files/orig/F6H/9YP2/GUKB3PNB/F6H9YP2GUKB3PNB.png
It's 18k and 18k on the top side, and 12k and 12k on the bottom side ;-)
i am bulitin this project and its great
but i cant understand d boost converter ckt which charges ipod!!!!
just one thing.....i want to efficiently convert the 24-30volt out put to 5 volt for charging.....the 7805 has a lot of drop....i cant get 5v with it...
any ideas
And just one more thing, the input voltage is DC (12-24v) , and them it becomes AC and them in the secondary device it becomes again into DC by using the bridge rectifer? Am I right?
Thanks and nice project!
But
what is the inductance value of your coils and the diameter?and what is the resonant frequency?
:
:
I sent 12V with 2.5A
but I received about
15mA and 10V
??
What is the alternative for Ferrite toroid? coz i can't find it
we can use an ordinary inductor or not
than you
I connect your circuit ;
But there is a problem with primary coil :
its do shirt circuit...?!
why..?
If you use too little wire, your current draw will be enormous.
some under $20 ,for IPHONES,cell phones and more
http://www.youtube.com/watch?feature=player_profilepage&v=Uap1bj3F-UA#t=167s
60 cm to 2m of scope
Thanks
Can the inductance that created by the transmitter coil and the value of capacitance used in the transmitter circuit be calculated by using resonance effect?
the formula is stated in the link below...thx in advance.
http://en.wikipedia.org/wiki/LC_circuit
The only thing that's an issue is to figure out the inductance; Unless you have an LC meter, calculations are the way to go!
Hmm....some how my testing failed...
Is it using ceramic capacitor capable in transmitter circuit?
Since a PSP can charge via USB, then the answer is assumed to be yes.
Check your connections and layout, and make sure everything is in the right place.
What kind of power supply are you using?
I would also like to know if you'd put in like 300 watts in a similar circuit (that can handle it) would you recieve enaugh power to power like 80 watts?
or, how much watts input would you need to get 80 watts till 3 meters away?
But be careful.
That much power could kill so many things in this circuit.....