Charge Your Phone With a Car Battery (6V-24V)
Intro: Charge Your Phone With a Car Battery (6V-24V)
Charging your smartphone while camping outside is not always easy. I am showing you how to charge your phone by using a car battery and a moped battery. You can also use the gadget with any kind of 6V-24V power source.
STEP 1: Watch the Video!
The video already talks about the most important facts. But I will also give you some more informations about the project in the next steps.
STEP 2: It Is Time to Choose Your Circuit!
You may have noticed that I build 2 cicuits inside this gadget, which basically have the same function. But they have their own pros and cons:
LM7805:
+ very simple, perfect for beginners
+ very cheap
+ useful when you only need a little current
- efficiency is horrible with higher voltages (24V --> 21%--> becomes a heater)
(12V --> 42%--> not nice)
LM2576:
- more complex circuit
- more parts, more costs
+ efficiency is quite good for a DIY phone charger (around 80%)
You can decide which one you want to use or maybe you build both. It is up to you.
STEP 3: The Simple Way: LM7805!
Get your parts here (affiliate links):
Ebay:
LM7805:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Capacitor Kit:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Amazon.de:
LM7805: http://amzn.to/1rFtsve
Capacitor Kit: http://amzn.to/1vEZGGc
You only need 3 parts for this circuit. If you got all the parts then follow the schematic to create your circuit. Feel free to store your new gadget in an awesome case.
STEP 4: The Efficient Way: LM2576!
Get your parts here (affiliate links):
LM 2576 (be sure to get the 5V version, there also exists an adjustable one):http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Capacitor kit:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Schottky Diode:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Coil: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
This circuit requires 5 parts. But it is still pretty cheap and creating the circuit should be fairly easy.
STEP 5: Combine the Circuits and Make a Case!
If you decided to build both circuits and you want to combine them in one awesome case like me, then get your parts and follow the schematic.
Case+PCB:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Rotary switch:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Binding post:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
Green LED 5mm:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
DC switch:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
STEP 6: Success!
I hope your new gadgets works great and you enjoyed this project.
Feel free to check out my Youtube channel for more awesome projects.
https://www.youtube.com/user/greatscottlab
You can also follow me on Facebook, Twitter and Google+ for news about upcoming projects and behind the scenes informations.
17 Comments
Powerbrapp 1 year ago
ezyalb 1 year ago
Older Wiser 2 years ago
Thanks
TertiusB 3 years ago
Tzelliot 4 years ago
Htt200472ab 8 years ago
make thing ID 8 years ago
i have no coil / inductor can you give the alternative
GreatScottLab 8 years ago
No
e4newbies 9 years ago
Now i made a pcb for that circuit (LM2576 circuit only). I used heatsink with IC & yes...it worked. But there is still problem with inductor.. Although i used an inductor with current rating upto 3Abut it still becomes hot enough to touch..!
(Plz note that i couldn't find the inductor in toroidal form with proper rating that's why i used 3A 100uH inductor in cylinderical form)
e4newbies 9 years ago
Now i made a pcb for that circuit (LM2576 circuit only). I used heatsink with IC & yes...it worked. But there is still problem with inductor.. Although i used an inductor with current rating upto 3Abut it still becomes hot enough to touch..!
(Plz note that i couldn't find the inductor in toroidal form with proper rating that's why i used 3A 100uH inductor in cylinderical form)
e4newbies 9 years ago
I tried one at bread board for testing...though it worked but the problem is my ic 2576 & inductor are heating up. I connected my phone n it started charging. Al most after 15 or 20 min the ic an d inductor became so hot that it was hard to touch them
GreatScottLab 9 years ago
That should not happen. Check your solder connections.
e4newbies 9 years ago
e4newbies 9 years ago
anyone can tell the reason and suggest any change to make it more efficient
RajarshiD 9 years ago
Very nice method. :)
I want to charge my phone using a 6V Lead acid battery (6.8V 5 Ah).
So my question is can I use this switching regulator in case of 6.8 V battery ?
If not please suggest one.
Thanks in advance :)
Psycho4Ever 10 years ago
Psycho4Ever 10 years ago