Comments on DIY Electronics Projects and Circuit Diagrams, Schematics: USB Powered Mobile Phone Battery Charger

To younsik's post. Dated: 21 FEBRUARY, 2010 D...

2011-12-17T23:25:02.513+05:00

To younsik's post. Dated: 21 FEBRUARY, 2010

Dear friend, this circuit is designed with very limited components to save money & time. If u still want to use it, then replace R1 with a 1K potentiometer. Start lowering the resistant value and adjust it until u get 4.7V output.

Replace D1 with 1N 4007 and C1 with 25 V 100 uF an...

2011-04-06T17:02:29.627+05:00

Replace D1 with 1N 4007 and C1 with 25 V 100 uF and then try again

Replace D1 with 1N 4007 and try again my friend

2011-04-06T17:01:02.544+05:00

Replace D1 with 1N 4007 and try again my friend

I read this article and I question my self how you...

2011-01-24T00:49:19.702+05:00

I read this article and I question my self how you going to obtain 4.7v if you have a zener in the base with the same voltage and a diode in the end. The zener going to reduce the voltage in the base and in the reality the voltage in the output is going to be like 4.1v and the last diode to work needs 0.6v so the voltage is 3.5v Just remove the zener from the base and the diode from the output and you obtain 4.6v.

SORRY PAL I MEAN THE CIRCUT .. :)

2010-04-27T11:55:05.875+05:00

SORRY PAL I MEAN THE CIRCUT .. :)

@Sjiv Unfortunately i haven't built this circu...

2010-04-27T11:50:50.061+05:00

@Sjiv
Unfortunately i haven't built this circuit and can't suggest you to built it. If you have any kind of problem with this so please make another one available on this site.

@Samjay
What kind of software?

2010-04-27T11:44:54.882+05:00

This comment has been removed by the author.

Have you checked the circuit? Can any mobile batte...

2010-04-27T10:02:47.171+05:00

Have you checked the circuit?
Can any mobile battery can be used?

@yongsik As you know that the circuits published h...

2010-02-22T09:42:25.126+05:00

@yongsik
As you know that the circuits published here are from many sources like Magazines, Websites etc... I can not build and test all the circuits. So this time i am going to make this circuit because of you. Please wait max 7 days while i make the circuit and publish it's picture and bug fixing solutions here.
Thank You.

Help! Strange to say that, The output is not 4.7vo...

2010-02-21T23:13:29.019+05:00

Help!
Strange to say that, The output is not 4.7volt but 2.8volt (RMS) just. I use Digital power supply for the input voltage. This can replaceable “A” type USB input. Sure, it set to 5.1volt (RMS). The output result was 3.3volt (RMS) without D1 diode. Why it is not 5volt around? How can I solve this? Would you tell me what is wrong? (P.S: I know as TR pin-number are 1(Emitter)-2(Collector)-3(Base).)