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!
Remove these ads by
Signing UpStep 1: So 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!
Visit Our Store »
Go Pro Today »
It's right here. I linked it above, but, I suppose it's sort of easy to skim over.
Enjoy!
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 ;-)
when i coonect the transmitter coil to transmitter then the o/p voltage indicated by voltmeter is zero!
if i remove coil, then it shows 21V AC at the transmitter o/p.
please help me!
Can u pls tell how we can modify this ckt to charge SAMSUNG S3??
Whether the DIY inductive charger available in the market for SAMSUNG S3 would work??
http://www.ubergizmo.com/2012/10/diy-wireless-charging-kit-for-samsung-galaxy-s3-available-for-55-on-ebay/
im going to try to make a smaller more efficient version just was wondering, im gonna try to get away with using a single irfp 450
I've selected your design as my undergrad project but I'm having some complications. Could you please help?
I want to use AC source instead of DC. What modifications do I need to make? Can I use another bridge rectifier on the transmitter side to convert it to DC? Can I use any other type of capacitors instead of MKP or MKT type?
Waiting for your reply
Regards
and can you tell me why that fan is used and also that silver thing behind the mosfet
cuz i really need to to make something for my science exhibition
The fan is used to move the heat away from the heatsink.
The boost converter... em. http://cds.linear.com/docs/Datasheet/10701fe.pdf
Get some of those, and on page 8, make the buck converter on that page. You'll need quite a few more parts though... Don't know when your science exhibition is.
Using a 5 volt regulator as I suggested will work just as well though.
or should i just hook up a 5V regulator and connect those resistors and solder em to the female port ................................................................................
my exhibition is on 2nd July though
but i just need to make it sure that the out put is coming
if it works then ill make that BOOST CONVERTER FOR SURE ,........... :D
instead of MKP10 series 1.0uF tank capacitor
I am working on wireless charger using a frequency of 350kHZ. Your project is a life saver. Got an idea when i saw yours.
I have my circuit, online source,but did most of the calculations involved myself. Having a problem with the coils. I know i have to use different no of turns and inductance from the transmitter coil but i don't know how to go about it. Would be glad if u can help. Thanx
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.
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!