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You are here:Home/IC 555/ Mobile cellphone charger
Mobile cellphone chargerWhile travelling charging of mobile battery is great problem because power supply source is not
generally accessible. Here is a simple project using very common electronics components for
charging mobile battery using AA cells.
Circuit descriptions of mobile cellphone chargerThe main part of the circuit mobile cellphone charger is timer IC NE555, used to charge and
monitor the voltage level. IC1get control voltage to pin 5 by zener diode ZD1. Threshold pin 6
and trigger pin 2 is supplied with a voltage set by VR1and VR2respectively. The trigger pin 2 of
IC1is below 1/3VCCwhen discharge battery is connected to the circuit as a result flip-flop of
IC1is switched on to take output pin 3 high. The process is reversed when battery is fully charged
of charged battery is connected. Here transistor T1used to enhance the charging current from
output pin 3 of IC1. Adjust potentiometer VR1and VR2as per require.
LED status for different charging conditions
Load across the output Output frequency (at pin 3) LED1
No battery connected 765 kHz On
Charging battery 4.5 Hz Blink
Fully charged battery 0 Off
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PARTS LISTResistors (all -watt, 5% Carbon)
R1= 390
R2= 680
R3= 39 /1W
R4= 27 K
R5= 47 K
R6= 3.3 K
R7= 100 /1W
VR1, VR2= 20 K
Capacitors
http://www.electronicsproject.org/wp-content/uploads/2012/08/mobile-battery-charger.jpg8/14/2019 Electronics Project 1.docx
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C1= 0.001 F (ceramic disc)
C2= 0.01 F (ceramic disc)
C3= 4.7 F/25V (Electrolytic )
Semiconductors
IC1= NE555 timer IC
T1= SL100 or any Medium power general purpose NPN transistor like: 2N4922 ,
2N4921,2N4238, FCX1053A
ZD1= 5.6 V/1W
LED1
Miscellaneous
SW1= On/off switch
1.5V*8 AA cells
Mobile connector
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Please leave your Suggestions , Feedback , queries and comments through the comment section
below. We will do our best to reply to your comment within 12-24 hours.
P.S. Emails regarding project helps will be strictly ignored ; so please use this Comment form
instead.
Comments
1. agasthya says:
January 15, 2013 at 8:49 am
hii ur projects are good vr tryin mobile cellphone charger in tat mobile connectors is been specified wat
kind of mobile connectors to b used can u clear please thank you
Reply
o admin says:
January 21, 2013 at 11:20 am
you can use any connector according to your availability!
Reply
Diode F says:
March 5, 2013 at 3:12 pm
Does this circuit charge a 3.7 lithium ion phone battery??plz i need to know asap
Thank you
http://electronicsproject.org/mobile-cellphone-charger/#comment-488http://electronicsproject.org/mobile-cellphone-charger/#comment-488http://electronicsproject.org/mobile-cellphone-charger/?replytocom=488#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=488#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-627http://electronicsproject.org/mobile-cellphone-charger/#comment-627http://electronicsproject.org/mobile-cellphone-charger/?replytocom=627#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=627#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-2140http://electronicsproject.org/mobile-cellphone-charger/#comment-2140http://electronicsproject.org/mobile-cellphone-charger/#comment-2140http://electronicsproject.org/mobile-cellphone-charger/?replytocom=627#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-627http://electronicsproject.org/mobile-cellphone-charger/?replytocom=488#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-4888/14/2019 Electronics Project 1.docx
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Reply
Electroinics Project Adminsays:
March 5, 2013 at 9:30 pm
Yes it does. Just make sure you limit the charging current by adjusting VR1 and VR2.
Reply
2. thiyagu says:
January 18, 2013 at 10:07 am
@agasthya
it is a universal mobile charger so u can connect any mobile connector..for example..if u want to build a
charger for nokia then u have to install a nokia pin or if u want to connect a sony ericsson mobile u caninstall sony charger pins at the output
Reply
3. ajay durgude says:
January 19, 2013 at 6:46 am
can we make a wireless phone charger ,if yes then tell me the processor
Reply
http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2140#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=2140#respondhttp://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/#comment-2176http://electronicsproject.org/mobile-cellphone-charger/#comment-2176http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2176#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=2176#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-550http://electronicsproject.org/mobile-cellphone-charger/#comment-550http://electronicsproject.org/mobile-cellphone-charger/?replytocom=550#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=550#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-572http://electronicsproject.org/mobile-cellphone-charger/#comment-572http://electronicsproject.org/mobile-cellphone-charger/?replytocom=572#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=572#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=572#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-572http://electronicsproject.org/mobile-cellphone-charger/?replytocom=550#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-550http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2176#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-2176http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2140#respond8/14/2019 Electronics Project 1.docx
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4. madhuri says:
January 21, 2013 at 11:08 am
to which type of mobile ,this circuit can be used for charging
Reply
o admin says:
January 21, 2013 at 11:18 am
you can charge any type of mobile battery! And you have to change the value of zener diode according to
battery voltage.
Reply
5. madhuri says:
January 21, 2013 at 11:24 amplese explain me how values of zenar diodes can be varied according to battery voltages
Reply
o admin says:
http://electronicsproject.org/mobile-cellphone-charger/#comment-624http://electronicsproject.org/mobile-cellphone-charger/#comment-624http://electronicsproject.org/mobile-cellphone-charger/?replytocom=624#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=624#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-626http://electronicsproject.org/mobile-cellphone-charger/#comment-626http://electronicsproject.org/mobile-cellphone-charger/?replytocom=626#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=626#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-628http://electronicsproject.org/mobile-cellphone-charger/#comment-628http://electronicsproject.org/mobile-cellphone-charger/?replytocom=628#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=628#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=628#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-628http://electronicsproject.org/mobile-cellphone-charger/?replytocom=626#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-626http://electronicsproject.org/mobile-cellphone-charger/?replytocom=624#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-6248/14/2019 Electronics Project 1.docx
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January 21, 2013 at 11:30 am
I mean if your battery volt is less then 3.5V then you have to replace zener diode ZD1 with appropriate value
i.e. 4.2Volt
Reply
6. usha says:
January 22, 2013 at 4:41 pm
hi i am doing my first project can u help me to judge a title
Reply
7. madhuri says:
January 23, 2013 at 10:37 am
please explain the working of this circuit
Reply
8. resy says:
February 7, 2013 at 11:39 am
hi..just want to ask..the voltage supply in your circuit is only 12v, how long that will last?
http://electronicsproject.org/mobile-cellphone-charger/#comment-629http://electronicsproject.org/mobile-cellphone-charger/#comment-629http://electronicsproject.org/mobile-cellphone-charger/?replytocom=629#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=629#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-660http://electronicsproject.org/mobile-cellphone-charger/#comment-660http://electronicsproject.org/mobile-cellphone-charger/?replytocom=660#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=660#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-688http://electronicsproject.org/mobile-cellphone-charger/#comment-688http://electronicsproject.org/mobile-cellphone-charger/?replytocom=688#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=688#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-964http://electronicsproject.org/mobile-cellphone-charger/#comment-964http://electronicsproject.org/mobile-cellphone-charger/#comment-964http://electronicsproject.org/mobile-cellphone-charger/?replytocom=688#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-688http://electronicsproject.org/mobile-cellphone-charger/?replytocom=660#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-660http://electronicsproject.org/mobile-cellphone-charger/?replytocom=629#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-6298/14/2019 Electronics Project 1.docx
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Reply
9. Aakash says:
February 10, 2013 at 2:58 pm
can i get the abstract and introduction about the same above
Reply
10. dastan triphon says:
February 18, 2013 at 2:31 pm
am trying to make universal one but for laptop , an u help me
Reply
11. Anjna says:
February 18, 2013 at 7:41 pm
I just want to ask u dat the switch that is mentioned in the circuit diagram so want kind of switches can we
use for this circuit and r these easily available if yes then wat do we have to say fr the same.???
Reply
http://electronicsproject.org/mobile-cellphone-charger/?replytocom=964#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=964#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1011http://electronicsproject.org/mobile-cellphone-charger/#comment-1011http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1011#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1011#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1274http://electronicsproject.org/mobile-cellphone-charger/#comment-1274http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1274#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1274#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1286http://electronicsproject.org/mobile-cellphone-charger/#comment-1286http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1286#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1286#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1286#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1286http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1274#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1274http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1011#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1011http://electronicsproject.org/mobile-cellphone-charger/?replytocom=964#respond8/14/2019 Electronics Project 1.docx
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12. nandhini says:
February 19, 2013 at 10:36 pm
can u please xplain the working of this circuit
Reply
13. Anonymous says:
February 21, 2013 at 3:01 pm
please tell me total cost of this charger..nd if we connect it with a electricity then what type of change
needed?
Reply
14. BARATH KUMAR.Asays:
February 24, 2013 at 12:10 pmCAN U EXPLAIN THE WORKING OF THE CIRCUT
Reply
o Adminsays:
http://electronicsproject.org/mobile-cellphone-charger/#comment-1328http://electronicsproject.org/mobile-cellphone-charger/#comment-1328http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1328#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1328#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1411http://electronicsproject.org/mobile-cellphone-charger/#comment-1411http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1411#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1411#respondhttp://yahoo/http://yahoo/http://yahoo/http://electronicsproject.org/mobile-cellphone-charger/#comment-1503http://electronicsproject.org/mobile-cellphone-charger/#comment-1503http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1503#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1503#respondhttp://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1503#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1503http://yahoo/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1411#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1411http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1328#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-13288/14/2019 Electronics Project 1.docx
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February 24, 2013 at 12:15 pm
The circuit is described already in the article.
Can you please tell me what exactly is it that you dont understand.
Reply
15. chaitanya says:
February 24, 2013 at 8:15 pm
i want a full report on this mobile charger. (pdf)where can i get it?????
Reply
o Adminsays:
February 24, 2013 at 9:49 pm
I am not sure about that!
You cannot find a pdf report in our site ; And I also doubt that you can find it anywhere online.But with some simple online research and this article you can for sure create your own PDF report.
Reply
16. Any Hussain says:
March 2, 2013 at 9:11 am
http://electronicsproject.org/mobile-cellphone-charger/#comment-1504http://electronicsproject.org/mobile-cellphone-charger/#comment-1504http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1504#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1504#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1519http://electronicsproject.org/mobile-cellphone-charger/#comment-1519http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1519#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1519#respondhttp://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/#comment-1525http://electronicsproject.org/mobile-cellphone-charger/#comment-1525http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1525#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1525#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1859http://electronicsproject.org/mobile-cellphone-charger/#comment-1859http://electronicsproject.org/mobile-cellphone-charger/#comment-1859http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1525#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1525http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1519#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1519http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1504#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-15048/14/2019 Electronics Project 1.docx
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ThanxIt came @ the right time
Reply
17. Any Hussain says:
March 2, 2013 at 9:13 am
If we dont get a SL100 transistor than is there an equivalent trnasistor that can be used??
Reply
o Electroinics Project Adminsays:
March 3, 2013 at 5:58 pm
You can also use 2N4238.
Reply
18. aditya kumar says:
March 12, 2013 at 10:26 pm
hey hi.,cn u explain me
if the battery is discharge which v connect in this circuit..
then how cn i charge this battery
do reply a.s.a.p..:-@
http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1859#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1859#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1861http://electronicsproject.org/mobile-cellphone-charger/#comment-1861http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1861#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1861#respondhttp://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/#comment-1970http://electronicsproject.org/mobile-cellphone-charger/#comment-1970http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1970#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=1970#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-2670http://electronicsproject.org/mobile-cellphone-charger/#comment-2670http://electronicsproject.org/mobile-cellphone-charger/#comment-2670http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1970#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1970http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1861#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-1861http://electronicsproject.org/mobile-cellphone-charger/?replytocom=1859#respond8/14/2019 Electronics Project 1.docx
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Reply
o Electroinics Project Adminsays:
March 13, 2013 at 11:44 am
I didnt understood your question exactly but have you tried resetting VR1 and VR2?
Reply
19. Anisha Rajput says:
March 17, 2013 at 2:57 pm
Can we use a battery of 9V instead of 12V without changing any other values? And can we keep
C1=0.1uF??? Will it work?????????
Please reply as soon as possible.Thank you.
Reply
o Electroinics Project Adminsays:
March 24, 2013 at 9:34 am
You can use 9V instead of 12 volt without any modifications.
And regarding the capacitors value I would suggest to use the value suggested in the part list i.e. 0.001 uF
ceramic type.
http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2670#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=2670#respondhttp://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/#comment-2714http://electronicsproject.org/mobile-cellphone-charger/#comment-2714http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2714#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=2714#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-3163http://electronicsproject.org/mobile-cellphone-charger/#comment-3163http://electronicsproject.org/mobile-cellphone-charger/?replytocom=3163#respondhttp://electronicsproject.org/mobile-cellphone-charger/?replytocom=3163#respondhttp://electronicsproject.org/http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/#comment-4065http://electronicsproject.org/mobile-cellphone-charger/#comment-4065http://electronicsproject.org/mobile-cellphone-charger/#comment-4065http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=3163#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-3163http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2714#respondhttp://electronicsproject.org/mobile-cellphone-charger/#comment-2714http://electronicsproject.org/http://electronicsproject.org/mobile-cellphone-charger/?replytocom=2670#respond8/14/2019 Electronics Project 1.docx
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Reply
20. Achu says:
March 17, 2013 at 8:35 pm
I tried to make this project but led is not blinking when battery is connected.I used 9 V battery.Battery is
3.7 lithium ion battery. I took VR1=VR2=20k and Zener diode of 5.6V.Plz help asap
Reply
o Electroinics Project Adminsays:
March 24, 2013 at 9:30 am
The factors that determines the working of the circuit are:
> Setting VR1 and VR2 by rotating it to limit output current.> Many of the cellphone batteries contains three terminals , one for common or ground , one for charging anddischarging and one for sensing , So making sure the output is connected to correct terminals.
Reply
21. bhumika says:
March 20, 2013 at 2:56 pm
Where is the connection for
the 7th pin of the ic ????
Its not marked in the fig.
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March 24, 2013 at 8:47 am
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