tag:blogger.com,1999:blog-8622007552114030374.post736463002673145657..comments2024-01-03T20:44:11.502-08:00Comments on simple electronics: Mobile Cell phone Charger projectUnknownnoreply@blogger.comBlogger39125tag:blogger.com,1999:blog-8622007552114030374.post-26846908867653213072015-02-10T08:05:59.102-08:002015-02-10T08:05:59.102-08:00please give me conclusion to this circuit and futu...please give me conclusion to this circuit and future scopeAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-44588685135326174052015-02-10T08:03:59.712-08:002015-02-10T08:03:59.712-08:00can please explain ckt operation in detail..can please explain ckt operation in detail..Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-23388055939431428942013-08-29T06:29:36.517-07:002013-08-29T06:29:36.517-07:00sir how to connect this to my cellphone sir how to connect this to my cellphone meticulous arorahttps://www.blogger.com/profile/05484885601856230304noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-37463717863463080452013-06-01T22:59:55.320-07:002013-06-01T22:59:55.320-07:00A good charger has an output of 4V DC to mt5000 c...A good charger has an output of 4V DC to <a href="http://www.mobileaccessoriez.com/keep-your-cell-phone-active-with-travel-charger/" rel="nofollow">mt5000 cd de mountek</a> 8V DC and a current capacity of 100mA up to 500mAElizabeth J. Nealhttps://www.blogger.com/profile/01824134730760179008noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-12267390608069280332013-05-16T20:18:40.408-07:002013-05-16T20:18:40.408-07:00Please can i get project report of this charger.
Please can i get project report of this charger.<br />Unknownhttps://www.blogger.com/profile/01714027555067873343noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-71256101396332306172012-09-27T13:10:33.107-07:002012-09-27T13:10:33.107-07:00Thanks for your effort, Kindly tell me the require...Thanks for your effort, Kindly tell me the requirement and circuit for an output of 5v 1.0A (regulated supply) as most of the current smartphones require using usb port, using rechargeable AA NiMH/NiCd batteries or 9V..<br /> Mahendra er.mkgautam@gmail.comnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-49423485513749042672012-09-26T11:42:52.498-07:002012-09-26T11:42:52.498-07:00can i used a USB port instead? can i used a USB port instead? Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-53338448078323508802012-09-09T23:25:42.655-07:002012-09-09T23:25:42.655-07:00i have 2 lithium cells of laptop battery rating 3....i have 2 lithium cells of laptop battery rating 3.6v 2200mah each can i charge my cell phone with them?<br />Anonymoushttps://www.blogger.com/profile/16784747658303754484noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-23085983771701785452012-08-23T03:13:44.996-07:002012-08-23T03:13:44.996-07:00which is the positive and negative of mobile???which is the positive and negative of mobile???Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-73154955539780508462012-08-12T14:37:31.165-07:002012-08-12T14:37:31.165-07:00A good way to handle this is to use 4.7k variable ...A good way to handle this is to use 4.7k variable resistor and adjust between 1k and 3.9k.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-27910589677174174342012-03-15T23:46:07.841-07:002012-03-15T23:46:07.841-07:00sir,
which are the best cell phone charger
availab...sir,<br />which are the best cell phone charger<br />available in india and not available in india keeping in mind its price & perfomance, which can able charge latest high end cell phones.JJhttps://www.blogger.com/profile/02891996747606939546noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-57655492884869726362012-03-15T23:30:38.712-07:002012-03-15T23:30:38.712-07:00I want to built 1100mAh to 1500 mAh with 3.7 v and...I want to built 1100mAh to 1500 mAh with 3.7 v and 4.9wh,<br />can you advice me to how i can do so by using parts recd in India or in china.<br /><br />pl reply urgentlyJJhttps://www.blogger.com/profile/02891996747606939546noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-61952058142408528362012-02-26T04:45:04.118-08:002012-02-26T04:45:04.118-08:00Use Improve and Simplified Charger
R2-2k ohms 1/4W...<b>Use Improve and Simplified Charger</b><br />R2-2k ohms 1/4W<br />LED - red<br />R1 - 5 ohms 1/2W<br />Transistor -2N2222 or 9013<br /><br />But the supply source is from battery.DH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-63871854875518332342012-02-26T01:39:10.454-08:002012-02-26T01:39:10.454-08:00sir i want to make a 4v mobile charger without tra...sir i want to make a 4v mobile charger without transformer which component are needed please told thier value alsoUnknownhttps://www.blogger.com/profile/04165095605965208210noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-33411586994941068202012-02-19T00:45:52.802-08:002012-02-19T00:45:52.802-08:00If your solar panel is rated 6V @ 100mA, i suggest...If your solar panel is rated 6V @ 100mA, i suggest just connect it directly to your mobile and just series 22 ohms resistor rated 1/2W and 1N4148 diode.<br />The problem if you use this charger with your panel, it might not charge because the charger itself consumes power.<br />Another cause of problem is the 100mA output current might be too low for the cellphone to charge.DH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-84248239373017250162012-02-18T03:53:54.765-08:002012-02-18T03:53:54.765-08:00excellent site.. sir i just use 6v 100ma solar pan...excellent site.. sir i just use 6v 100ma solar panel but unable to charge a phone...Krishnanhttps://www.blogger.com/profile/05990709203204221238noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-65892757552358683622012-01-31T16:11:39.516-08:002012-01-31T16:11:39.516-08:00Cellphones have built in program or circuitry that...Cellphones have built in program or circuitry that automatically turn the charging off when battery is fully charged. I cant give you a charger circuit that automatically turns off the charging when battery is fully charged since we need to know the type of the battery.DH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-83721090489778943642012-01-18T05:39:34.158-08:002012-01-18T05:39:34.158-08:00hello...do you have any idea how to construct mobi...hello...do you have any idea how to construct mobile phone charger circuit that can cut off the supply automatically if the the battery phone already full...? please help me..Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-92015722093729547572011-11-09T21:32:16.245-08:002011-11-09T21:32:16.245-08:00thanks akai1987.
If you want a 12V to 5V regulated...thanks akai1987.<br />If you want a 12V to 5V regulated power supply you can use 7805 IC. it can deliver more than 1A at a regulated 5V. <br />See <a href="http://www.simple-electronics.com/2011/08/usb-charger-circuit.html" rel="nofollow">USB charger</a> and <a href="http://www.simple-electronics.com/2009/11/12v-to-5v-dc-converter-using-7805.html" rel="nofollow">12V to 5V regulator</a><br />TheseDH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-13332427524528864932011-11-09T17:00:32.763-08:002011-11-09T17:00:32.763-08:00Hi. I find your article very interesting. I've...Hi. I find your article very interesting. I've tried building this battery charger before, but my only component is the 12 volts car light bulb connected in series with the battery to act just like a resistor. The bulb just glows when the charger is connected to the phone. My lead acid battery drained faster because of this. But my phones are charging successfully. Later on, I got a nicer akai1987https://www.blogger.com/profile/01603258037219708552noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-14955051839107779792011-08-16T23:24:00.163-07:002011-08-16T23:24:00.163-07:00Nirosh,
what happen if I change 9013 transistor to...<i>Nirosh,<br />what happen if I change 9013 transistor to 2n2222a transistor.</i><br /><br />You can replace 9013 to any general purpose transistor such as 2n222a. Replacing it with any transistor is not a big issue and gives no or little difference to the charger performance.DH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-22795850001935951152011-08-14T07:06:06.688-07:002011-08-14T07:06:06.688-07:00Nirosh,
what happen if I change 9013 transistor to...Nirosh,<br />what happen if I change 9013 transistor to 2n2222a transistor.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-57563117611432916152011-08-13T10:11:32.827-07:002011-08-13T10:11:32.827-07:00I replaced 1N4001 diode and Removed LED and 220 re...<i>I replaced 1N4001 diode and Removed LED and 220 resistor. After this changes phone showing charging but after 20 minutes phone is showing not charge and hearing battery low sound.</i><br /><br />Try replacing 2K resistor with 1K and use higher capacity battery supply. Probably the battery power is consumed before your cellphone is charged. I want to remind you also that this charger is DH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-81233729207717690952011-08-12T05:39:25.814-07:002011-08-12T05:39:25.814-07:00I replaced 1N4001 diode and Removed LED and 220 re...I replaced 1N4001 diode and Removed LED and 220 resistor. After this changes phone showing charging but after 20 minutes phone is showing not charge and hearing battery low sound.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8622007552114030374.post-36581157966665993192011-08-11T20:15:09.929-07:002011-08-11T20:15:09.929-07:00I built your circuit and it connected to the nokia...<i>I built your circuit and it connected to the nokia 5130 phone. phone showing charging, but after one hour phone off and it’s fully discharge. What is the reason for that?</i><br /><br />Thank you for raising your concern!!<br /><b>Discharging of cellphone battery is theoretically not possible </b> unless the 1N4001 diode is removed or defective.<br /><br /><b>Suggestions:</b><br />We suggest DH-gmhttps://www.blogger.com/profile/16906779443966743177noreply@blogger.com