The project name says it all. It is a device that will charge things like Ipods, PDAs, other other devices that plugs into a USB to charge.
Step 1: Supplies
The parts needed for this project are all in the second picture.
You will require:
LM or MC 7805 +5VDC Voltage Regulator
Type-A Female USB Port
100 UF Electrolytic Capacitor 10-50v
0.1-0.5 UF Capacitor 6-50v (any type would do)
150-160 ohm Resistor (optional)
9V Battery clip
2.2V 20mA LED color of your choice (optional)
Unprinted circuit board
ON/OFF Switch (optional)
These parts can be easily purchased at your local electronic store, like Radio Shack. Or you can buy them online at:
http://www.digikey.com
Regulator:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=LM7805CT-ND
USB port:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=151-1080-ND
100 uF Capacitor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=P12392-ND
0.1 uF Capacitor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=399-4151-ND
You will require:
LM or MC 7805 +5VDC Voltage Regulator
Type-A Female USB Port
100 UF Electrolytic Capacitor 10-50v
0.1-0.5 UF Capacitor 6-50v (any type would do)
150-160 ohm Resistor (optional)
9V Battery clip
2.2V 20mA LED color of your choice (optional)
Unprinted circuit board
ON/OFF Switch (optional)
These parts can be easily purchased at your local electronic store, like Radio Shack. Or you can buy them online at:
http://www.digikey.com
Regulator:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=LM7805CT-ND
USB port:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=151-1080-ND
100 uF Capacitor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=P12392-ND
0.1 uF Capacitor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=399-4151-ND
I have a doubt regarding PCB etching provided.
The 7805 has the 2nd terminal as ground and 3rd terminal as output but the design given seems to have 2nd terminal connected to output and 3rdterminal to ground(As it seems to be connected to -ve terminal of battery). Can you please provide an explaination where I could've gone wrong in the interpretation?
You are right, this PCB is dangerously wrong: https://www.sparkfun.com/datasheets/Components/LM7805.pdf
this circuit is able to imput charge in the battery for reacharger?
https://www.youtube.com/watch?v=B6hxCUuh1Q4 what and Make by Own Best of Luck
I made the circuit and Nokia does not work
i'm willing to build a buck-boost converter (5v output) for my thermoelectric generator. For now i'm still cant design it. So the alternative way for me is to build a boost converter and make sure input of those converter doesnt exceed 5v. My question, can i use this circuit as the boost converter?
this is what i made on wiro board
Can u tell me what is highest voltage that can i give as an input to this charger and who many cell phones can it charge is 9 V is supplied as input????
35 volt max DC
Input voltage of 7805 regulator is 5V-18V and output voltage is 5V (4.8V-5.2V). regulator use to maintain the output voltage so this circuit can be use as a phone charger for motorcycle. am i right sir?
Input voltage of 7805 regulator is 5V-18V and output voltage is 5V (4.8V-5.2V). regulator use to maintain the output voltage so this circuit can be use as a phone charger for motorcycle. am i right sir?
Look for the Datasheet of the regulator you have.
hey! how can i do same with this kind of 6 volt 4.5Ah battery
USB Female hubs have 4 prongs as you've probably noticed. the right and left ones are ground and power respectively. The middle ones are the Data + and the Data -. for 99% of the phones out there you don't need to attach anything to the data ports. Apple products however have a strict security feature that will not allow one to use home made chargers.. you can hack this by "tricking" your apple product into thinking that it is actually plugged into a laptop. This can be done by splitting the power from the Voltage Regulator into two wires and attaching them to BOTH of the data ports WITH 100 ohms resistors (on each port). It's IMPORTANT that you use the 100 Volt resistors because you can blow your iphone/ipad 's usb port otherwise and never be able to charge it again. Good luck with your chargers!
you are so hot it works
But i am not able to charge my iphone 5s
Please help me out
Probably we need to look into designs of higher efficiency, for eg by Ladyada and others on Google. Since a voltage regulator, in theory (and in practice) is NEVER as efficient as a switched mode power supply (SMPS) , this design definitely needs a reboot! Do take a look a Ladyada's design. Search for her name in Instructables.
Anyway, thanks for the author for putting up this tutorial! We all learn from one another :)
i'm a appliance technician, 4 me this is a worst charger that i saw., coz if you see the diagram & try it to yourself oh my god this is not 100% effective & it will cause damage on your unit.
can I just reverse the 7805? mabe use diffrent restors to cut the voltage down a volt? The RCR123A battery is suppose to be kina fussy about charging.
I love this circuit!!!, its really close to what im trying to build, I am trying to reverse the voltage, so it charges a 3.0 v camera battery which charges at 4.2 @ 250mA, maybe put a LED across that turns on when battery reached 4.2v so you know its charged and all the voltag goes to the LED and protects the Lithium-ion battery. Its a rechargeable R123A. Any thoughts, help, sugestions?
You can't use a 7805 any more. You'll need a booster circuit because this thing is only to drop down the voltage. A booster circuit is able to push the voltage up from 3.7v to 5v.
ehm and these you can find on amazon or radioshack i think. Just search "5v booster circuit". If you have an iPhone, make sure that the circuit is prepared for iDevices (comments, description)
Not enough Power. An iPad needs about 2.1 Amps. This one brings only 1A.
Hi! I made this project, but i have a problem... I charge my Nokia 630 then i disconnect USB. but my battery level drops very fast, after i disconnect USB!
Heeelp me! what's wrong?
Can i use L7805CV?
Works just fine.
^_^
Is this Rechargeable ? Yes-Then ok! No-Then, what changes would have to do in this circuit ? Explain Please. Thanks in advance !!
Quick question: why are you using a electrolytic capacitor on your input voltage? Will a ceremic capacitor also work?
i am facing a serious problem..... Even after connecting the components with recommended values and with right polarities my phone instead of charging gets discharged with a constant rate..... what should i do...
i am facing a serious problem..... Even after connecting the components with recommended values and with right polarities my phone instead of charging gets discharged with a constant rate..... what should i do...
There is mistake in the printed circuit. Here is the fixed and reduced form. It include a LED and switch, too.
Long time, I know but if I don't have a board to play with, I solder everything and use hot glue to make sure everything is isolated. Hardly a final product but it gets some use as I learn.
It's should look like this: