Cellphone Charger

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#1 21660725 16 Jan 2012 13:46

Syed Al Amin Syed Al Amin

Anonymous

Post #1
21660725 16 Jan 2012 13:46

How to make easy & low cost Circuit diagram for cellphone charger.
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#2 21660726 16 Jan 2012 13:53

Steve Lawson Steve Lawson

Anonymous

Post #2
21660726 16 Jan 2012 13:53

Correct me if I'm wrong (everyone else), but most cell phones, these days, are charged through the USB port. So, all you have to do is supply 5 volts DC, with enough current (500ma max) through a standard USB connection.

Just Google: "usb connector pinout" for a pin out diagram.
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#3 21660727 16 Jan 2012 15:21

Calinoaia Valentin Calinoaia Valentin

Anonymous

Post #3
21660727 16 Jan 2012 15:21

Yes, you are right, most cellphones use USB port to charge the battery, but I think there are on the market phones that work on 3.7 V too.

Syed Al Amin, about what phone are we talking about ?
#4 21660728 17 Jan 2012 01:52

Vivek Rajawat Vivek Rajawat

Anonymous

Post #4
21660728 17 Jan 2012 01:52

Latest mobile phone chargers use the SMPS technology.
Attached is the circuit diagram and here is the description of the circuit:
http://www.electronicsforu.com/EFYLinux/circuit/mar2004/Cir-01-mobile-charger.pdf

And a very interesting link is here:
http://www.engineersgarage.com/insight/how-mobile-phone-charger-works
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#5 21660729 14 Dec 2013 16:28

Tamara Sulie Tamara Sulie

Anonymous

Post #5
21660729 14 Dec 2013 16:28

I have 1 emergency cell phone charger but its usb and i am trying to plugin with my 1 external charger but i think due to low voltage its not picking up. Anybody can let me know please that how many voltage are required for usb?
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#6 21660730 10 Oct 2015 03:57

John Carlo Cadavero John Carlo Cadavero

Anonymous

Post #6
21660730 10 Oct 2015 03:57

sir im currently doing this project in our school can u post me a pcb layout for this? THANKS !
#7 21660731 13 Oct 2015 18:38

Brett Rhines Brett Rhines

Anonymous

Post #7
21660731 13 Oct 2015 18:38

Agree could you please share the pcb layout? Thx
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