Search for using Mobile Charger in Topics


modifying a mobile charger?

Hello, i have an old 2000mAh phone charger which i played with, it was supplying 3.5V.. i removed the battery and replaced it with 4 18650 batteries rated at 3000mAh each.. all are connected in parallel.. will this give me in theory 12000mAh battery? also, is it dangerous to use it or do i need to add any current limiter resistors to reduce the current..

Question by AbdullahF2    |  last reply



solar phone charger

Https://www.instructables.com/id/How-to-make-a-solar-iPodiPhone-charger-aka-Might/?ALLSTEPS <<< can i replace that with cheap nokia phone?? i need it for my school project =)?

Question by Syaril    |  last reply


My BE project is sound charger.Can i use a transformer to amplify signal from microphone from 3mV to 3Volts.?

I want to charge cellphone with the power of sound for which we are using a microphone.The output of the microphone is in millivolts.I would like to know if I can amplify my signal with a transformer because I cannot use any external power supply.Also we are thinking to store this amplified signal in an inductor.Is this the right way to go?If yes also suggest the transformer design for the same.

Question by abhishekardile    |  last reply


Volt conversion with mobile charger ?

Hi, I have to DC device  a) works with 5.V    (b) 1.5 Volt...  I am using mobile charger as a power supply.  How can i connect them with one mobile charger....as the charger output is 5.V  only.  a) works fine but as the other device require 1.5 Volts . Which type of power  component should i use to supply additional appox. 1.5 Volts ? will any of these can device blast ? Any type of tips n tricks will be very help full. Thanks, Richi

Topic by RichiV    |  last reply


Portable,rechargeable mobile charger? Answered

I've come up with a plan to make a potable mobile charger for my galaxy phone with a rechargeable 9 volts battery.My original mobile charger(220 VAC input) says it gives an output of 5VDC at 0.7 amperes and hence I decided to make it with the given ratings.So here's my plan-I'll use a 7805 to regulate the 9VDC from the battery to 5VDC.The 7805 gives a maximum of 1 A output.So here's my question should I use a current regulator(LM317) to limit the current from exceeding 0.7 amps or will the phone's battery draw the sufficient amps from the LM7805?Maybe it might be a good idea to assist the output with a resistor as a safety measure.So,what do you say?

Question by Adarsh_tronix    |  last reply



Using the wrong charger?

What are the risks of using the wrong charger for rechargable batteries?  Can you do it if you don't leave the batteries on too long?  Can you get away with it if you make certain the batteries don't get too hot?  Specificially for my 18V power tools the charger I have is only intended to charge NiCad batteries.  The company that made the tools has also made different types of battery packs that are interchangable in the tools, but each battery pack comes with a different model charger.  What if I used the NiCad charger to recharge a NiMh battery pack?  What if I use the NiCad charger to recharge a Lion battery pack?

Question by etcmn    |  last reply


Uses for Trickle Chargers?

Hi Guys I have been given 5 x 12v 500mA Trickle chargers with large croc clips on the end.  I'm relatively new to electronics and am trying to work out if they could be used for anything interesting.  In simple terms, can I use these as regular power supplies for 12v projects?  Or are they only useful for charging 12v batteries.  If so, would that be just Lead Acid batteries, or lithium or nicad also? Thanks

Topic by wizer    |  last reply


how does a mobile phone charger work?

 i just want to know how does a cell phone charger works. i know that it uses a transformer and diodes for rectification. my actual doubt is that i have read in a news paper that there would be 30% losses when the charger is given supply and no mobile is connected. am surprised how there can be so much loss

Question by spartans    |  last reply



Mobile charger from wind/air like windmill

Hi All, I want to make mobile charger with wind power like when i am bike/car/public transport at 60km/hr, i should able to charge my mobile. power genrated should be 5 volt at 2 amp. Could you provide me idea to construct one?

Topic by vindude5    |  last reply


how mobile phones convert Aternating voltage to direct voltage?

There is no big transformer in a mobile phone charger but still it is able to convert A.C to D.C though it is small

Question by deepakmurali    |  last reply


Usb Charger

I have 2 questions; 1.) Does anyone know if I can use a resistor in a usb charger? If so, what bands.(ex red,blue green, ect). 2.) Can I use an 3v LED to reduce the power to 6v. Would 6v harm my electronics?

Topic by ry25920    |  last reply


how to make a mobile charger into a usb charger for ipod?

Iwant to make a charger for my ipod ..car/home..from a mobile charger

Question  


Wind-powered phone-charger

Here's one for the tower-block dwellers - a wind turbine you stick to your window. On the inside, you stick the matching base-station, and the set uses electromagnetic induction to transfer energy from the spinning turbine to the phone in the charger's cradle. It's a neat idea, but I don't know if it's a real product - I tried tracing the links back, and ended up going round in circles in the blogosphere. What I am sure of, though, is that somebody reading this has got the skills and motivation to build their own version.  You don't need to use the same design of turbine blades, and it's up to you how it sticks to the window (suckers?  magnets through the glass?), but I bet you can do it. Just remember to post an Instructable. Traced back to Yanko Design.  Originally seen on NOTCOT.

Topic by Kiteman  


How to make a USB charger for my nokia mobile from LapTOP/PC....?

How to make a USB charger for my nokia mobile from LapTOP/PC....? I need clarifications in applying resistances...?

Question by chinnuabhi    |  last reply


Solar Charger?

Hello, I am looking to build a solar charger in a 4x3x1.6 inch (or smaller) box to be as portable as possible. My only problem is, I would like to mount the solar cell on the box. However, all solar cells are far too large to fit this box, I plan to use a rechargeable 9v battery for power storage. I was wondering if I can use a 6v solar cell, and still use a standard LM7805 5v Voltage Regulator to drop 6v to 5v, or if someone could find a 2.5x3.5 inch solar cell (9v) online somewhere (for cheap) that would really help (I've looked everywhere...) Thanks.

Question by Tuckoguy    |  last reply


Alkaline Charger

So, I want to try and build a charger for alkaline batteries with an Arduino.  I'll be using it to recharge 9v batteries. What I want to know is: What would the optimum charge current/voltage be?  Should I pulse the charge current? How do I detect the state of charge? How can I get ~1.6v from the arduino to charge an AA? Can I use PWM 5v? And any other useful info you may want to add. I have a ton of parts/shields/etc for arduino as well as components.  LCD's, IC's, LEDs, diodes, resistors, crystals, etc. Would also like to do a battery diagnostic utility to test health, resistance, charge, etc. Can anyone help? EDIT: So I made a quick circuit and sketch to charge an AA battery to 1.6v, using an LM317 adjustable voltage regulator. As os so far, it is working.  Now I need to figure out how to make a voltage doubler. I'm thinking something like 40-50 mA output at 10v. I have an LM324N quad op amp chip as well as one of these. How could I make a doubler circuit?

Topic by LiquidLightning    |  last reply


how do i make the best mobile charger ?

There are so many designs available which design is the best and economical to charge?

Question by imakethings    |  last reply


Charging mobile with a 6V lead acid battery?

Hello, I want to make something like power bank. i want to charge my mobile with a 6V 4.7Ah battery. My mobile charger is rated 5v 500mA. How to make this circuit?

Question by Rahul Mitra    |  last reply


Faraday induction ('those shake-to-charge flash lights') mobile phone/device charger

Need help using charging mechanism of shake flashlight (faradays law of induction) to charge mobile or usb devices.

Topic by mulan2015    |  last reply


Rotational Charger?

Any ideas how one could transform rotational movement into usable energy?  I want to attach a little radio device to a tire and have that device charge a little battery when the wheel rotates so that it can transmit information (i.e. rpm).  Was thinking of using a small Nordic radio and accelerometers to transmit data.  

Question by swaxolez    |  last reply


iPhone Chargers

I have seen many 'ibles on battery-powered USB chargers that say they cannot charge iPhones/iTouches because they require power to be supplied to the data pins. How, then, have I seen iPhone chargers (that work) with only two inner wires - a red and a black?  I recently bought an iPhone charger, so I could cut the wallwart off and use it instead of a USB port in this circuit. However, I have discovered that it only has 2 inner wires, as previously detailed. How could I use a 9V (PP3) battery and a 5V (7805) voltage regulator to turn this into a battery-powered charger? Both of the above questions are ones I would like answers to. Thanks in advance, ~H4ZZ

Topic by __DELETED__  


Capacitor charger? Answered

Ok so im planning on building a portable coil/rail gun. But one issue is I cant quite find a circuit that would work best to drive a custom transformer. The charger I have now is a flyback driver that I used a wall adapter to power. I just need some advice and maybe schematics. Thanks, bud

Question by budhaztm    |  last reply


bike charger

I ride on a bicycle patrol around my neighborhood three times a week.  (6-8 miles, good exercise) I also have another bike with a Wilderness Motor on it.  (36 V, 600 Watt motor) I don't use the Wilderness bike much anymore, but how could I wire a gizmo to charge some AA and/or AAA batteries?

Topic by rcg40    |  last reply


USB charger? Answered

I want to make a usb charger with 3 ports in which I can plug my laptop adaptor (16v, 2.5A)and charge my phone and other usb devices. I am planning to use a Lm-317 to regulate the voltage. Will it be fine or I need to consider something else also? And please don't tell me I can buy one!

Question by Ahtasham Ahmad Mohtashim    |  last reply


can a security tag ? be placed inside a mobile phone as the conductor for a mobile phone induction charger i trying to make it

Can a security tag ?  wired and connected to the battery be placed inside a mobile,and then place it  the phone on the conductor for a mobile phone induction charger i trying to make it

Topic by dmoloch    |  last reply



please i want to know how the charger of the mobile phone or the iPad works ? Answered

I just want to know because today i forgot my iPad's charger i just had the wire but i forgot the plug(it's a usb charger ) but i had the plug of my mobile's charger which is samsung and i connect the wire of the iPad's charger to the plug of my phone's charger and put it in the power supply and it worked and the iPad started charging , so it's kinda weird for me .....so i want to know how that happened or why at least ... thanks in advance 

Question by belal mostafa    |  last reply


Solar Charger?

Hi everyone! i want to build solar powered charger... i already build ups system using old computer system ups... configuration : 650va ups with 12v 35ah  battery. The battery is deep cycle one and should be charged in 8 hrs of good sun light.... so how many solar cells i need to buy and describe the calculation? Best online shop to buy a cheap and best cells ? Thanks in advance...

Question by arshanmugam    |  last reply


Mobile charger and audio amp power supply?

Hello friends i want to power mobile(feature) and audio amplifier (PAM8403) with single power supply. can you please help me? i am a beginner in electronics. how much voltage and amp i need for it. If i use 5volt 2Amp power supply.  will it burn PAM8403 if mobile not connected?

Question by jasveerg    |  last reply


2A USB Charger?

I have an MP3 charger, that charges at 5V Solidly, i.e it doesn't change. It's rated at 2A though, would this fry a 5V 550mA mobile phone and another USB Stick MP3 player? Or should I put it through a 7805 regulator? Thanks.

Topic by Josho    |  last reply


Charger circuit

Hey there, I'm planning to build a portable stereo speaker box thingy (you know what I mean). In order to power the 2x10W amplifier I want to use a 7.2V 1400mAh battery pack from an old RC car. As the housing of the box will be sealed I want to implement a mechanism to charge the pack. For this I wanted to achieve 3 things: -If the Power-Switch is turned on, the amp should be powered from the power line -If the Charge-Switch is turned on, the battery pack should be charged -If both of the switches are turned on, the amp should receive power from the power line while the battery pack is being charged. I have thought of the following cabling (see attached picture for a schematic) The blue box is the amplifier, the green box the battery pack and the orange connectors are tamiya connectors (the ones for RC cars) The first switch (marked in green) is a normal DPST switch which establishes the connection with the power line as well as the connection with the battery The second switch is a SPDT switch and activates either the connection between the battery and the amp or the connection between the power line and the battery. Will this work the way I think it will or does this configuration any faults? If the latter, what can I do I have to change? I'm actually really new to electronics, this if my first project so forgive me, if this setup is actually BS Cheers and sorry for the long post ^^'

Topic by Felixkeeg    |  last reply


mobility scooter

I have a walkabout 330 mobility scooter i have cut some wires and now i'm lost and they didn't make a manual for them and can i eliminate a lot of things like lights horn etc i only use it for golf  but i can't walk the course and i was wondering could and how to wire it in the simplest way to get it going ???  i'm really lost and confused any way to hot wire it maybe ???? Hope some one understands me Cheers macca

Topic by maccaorgordon    |  last reply


Nokia Car mobile charger to Sony USB player NW-E005F

Car mobile charger to Sony USB player NW-E005F I required circuit drawing

Topic by shindvs    |  last reply


Instructables in Mobile?

  I suggest to the developer of instructables to bring the instructables in mobile! I want to make easy to use instructables so it is start to make instructable in  Pocket Size! and i like to monitor my account how many views i have and to  check if i receive a letter or if i have a new inbox! actually to see and updated  to the new projects in instructables so pls. to all developers don't ignore my suggestion add an comment and we talk about it with the professional Developers of Instructables! Now it is the time to bring the Instructable in the future tech,and actually in MOBILE! From: Wareneutron(WN)

Topic by Wareneutron    |  last reply


i want to make 60 5mm led tube using mobile charger with circuite diagram plz?

I want to make 60, 5mm led tube light from mobile charger,so what else required and how to solder with images plz

Question by shakeelahmed    |  last reply


Is it possible to charge a mobile phone from a lemon? Answered

Im thinking, lots of electrodes in one lemon, joule thief and a capacitor maybe...?

Question by dalbyman    |  last reply


how to protect mobile phones using rfid tags?

We have plenty of mobile phones used inside our office for testing and those need to be traced if it stolen or hand carried by outsiders,is it possible to use rfid tags to track those phones in exit points using rfid readers

Question    |  last reply


Alternator use and output

Hail the reader and Bless the respondent. please can someone tell me the following 1. At what speed must a normal vehicle alternator turn to give max output... and what is this out put... I see my charge meter shows it charging at 10 amps... how long to fill the battery at 10 amps? 2. A pack of 6 12v truck batteries connected to make 1 big 12 volt battery... is it possible to charge this pack from more than 1 alternator and will it speed up the charge time to make the battery full to max?

Topic by carnut34    |  last reply


I would like to know how much force should be applied to get and output of 8v on a piezo electric ring.

I would like to make a mobile phone charger using a piezo electric crystal which can be placed inside our shoe, so that when we walk, we step on the piezo electric crystal and thus we can charge our mobile. for that i would like to kno more about piezo electric crystals, and how much force is to applied for getting an output of around 8 v and type of crystal to be used for this purpose. Thanks in advance.

Question by allsparkunleashed    |  last reply


AA to USB charger

Can someone provide me with a schematic for a AA-5v USB charger, either using 2xAA or 4xAA, using parts available on ebay UK (and no programmable chips), much like the mintyBoost, but the chip isn't available in the UK.

Topic by andy70707    |  last reply


Iphone charger, 1A.

Hello I have a Iphone 3Gs with the original Iphone charger. On the charger it says that it supply's  5V,1 A, and a normal computer usb-port supply's 5V,0.5 A. Is it safe to use my mp3player with the Iphone charger? On my mp3 players charger it sayd 0.5 A but I lost it. Can my mp3 player's battery break if I use double the current that is recommended? Question 2: If I buy those Iphone chargers on ebay, is it safe to use them on my Iphone? cgi.ebay.com/ws/eBayISAPI.dll Question 2: If I leave my charger in the outlet will it still draw current? Without any devices attached to it?

Question by Popstickal    |  last reply


Charge and use spare cellphone batteries

Ok, hopefully I'm posting this in the right forum. I got LOTS of broken cell phones at home and even some spare batteries from said phones. So what to do? I'm going to use them in some wearable projects. The problem that I'm having is that I'm not sure how to connect the wires so that I can charge it and how to connect the battery to the circuit. There are lots of instructables here but hell if I can find the right keywords to actually find what I'm looking for.  Any ideas? Tips for suitable instructables? Tips for better keywords? Keyphrases?  Best regards! Osquar

Topic by Osquar    |  last reply


Will using a solar cell fry my batteries? Answered

I intend to use a 6V 50mA solar cell to charge my cell phone and to charge 2 AA batteries separately. After review of some instructables, Ive read comments about a voltage regulator, capacitors, and the use of a diode but I do not actually see these items in use.  Do I need these things?

Question by onrust    |  last reply


how to use mobile as a modem so, to use internet in computer ?

I need to browse web pages in computer using mobile phone as modem?

Question    |  last reply


soler usb charger?

Hi all im trying to make a usb charger from a soler garden lite useing a 9v battyou ppl are gr8 can you help me

Question by marcus69    |  last reply


Mobility Scooter 24 volt charger from 12 volt car

Can anyone give me a cct diagram to make a 24volt charger to plug into my car cigar lighter socket please. I carry my mobilty scooter in my car and it is very difficult to keep taking it out, or taking the battery pack off to bring it into the house to charge it so it would be a great boon to me if I could be charging this whilst drivng. I can make a pcb if I can get a cct. Grateful thanks in anticipation. Tony

Topic by amazing1000    |  last reply


USB Charger Question...

Ok, I have a (4) AA battery holder which is wired in series so that I get 6V. I was then going to use (3) LM7805 regulators in parallel with heatsinks because a AA battery has approximately 2600mAH and each 7805 is rated @ 1A... I tried using (1) 7805 and it was so hot it burn my finger (BAD!) I'm making this device to power a Motorola V3 Razor. I guess my question is if this will work or not, the more I've been reading the USB standard is 5V @ 500mA... Just because the batteries are rated @ 2600mAH does that mean that they will put out that much power? Or will the phone only draw as much power as it needs? I can't afford to use this phone as a test! Please only respond if you know for sure - someone with an EE degree would be nice ;) Thanks in advance!

Topic by 02gsxr600    |  last reply