chargers, or booster??

I was watching pages throught here watching the diferent chargers post, they all very cool like the one it was built inside of an altoids can... BUT they where all made out of bateries and none of them where made out of lithium ion cell phones like bateris and i was wondering if this proces was posible so i can try to make one what yall say??????

Topic by chabelo 10 years ago  |  last reply 10 years ago


how can i build a trickle charger?

I want to build a solar powered battery charger so i need to know how to build a trickle charger i can hook the solar panel up to

Question by Brakermaker 10 years ago  |  last reply 9 years ago


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 9 years ago  |  last reply 4 years ago


Motorola Bluetooth charger to charge 3.7v li-ion batteries Answered

I have a little bluetooth charger that outputs 5.0V and 550mA, am I able to charge 3.7v li-ion batteries with this?

Question by vallka 6 years ago  |  last reply 6 years ago



circuit diagram and parts to repair 24 volt 20 amp battery charger uses Scr's?

I have a MAC 242011 battery charger  ( 24 volt 20 amp automatic battery charger I need a source and a cct diagram to repair . the Scrs are not working . can you help ? paulttq@yahoo.com I am in Ottawa Canada tel cell leave txt message 613 291 9942

Question by PaulTieTenQuee 6 years ago


is it possible to hook a dimmer switch to a cordless tool charger to make it universal for any voltage?

I dont know much about much but i have ideas sometimes lol the question pretty much sums it up useing a dimmer switch for a light in oes house to create a uiversal battery charger for power tools dewalt ryobi bosch etc thanks for ur time

Question by pytlakw 9 years ago  |  last reply 9 years ago


phone charger

My wall phone charger is busting up could i just make a usb charger out of it, and howdo i go about doing that, the phone is a samsung

Topic by Rotten 11 years ago  |  last reply 6 months ago


Ipod charger?

Ok i have looked at all the ipod charger instructables, and my ipod nano 4th gen won't charge! I hook it exactly like the ibles and no response! Some body please help!!!!!

Question by Adum24 8 years ago  |  last reply 6 years ago


Portable Chargers

Post your comments or questions

Topic by Yerboogieman 11 years ago  |  last reply 11 years ago


battery charger?

I have a 13.5v 1.7A "plug pack" battery charger that came with my solar speaker. because i live in Australia i had to change the plug pack to a local one. the only one i could get was a variable voltage (9 - 24) 1.5A. will it just take longer to charge or won't it work to charge my speaker.

Question by furby 5 years ago  |  last reply 5 years ago


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 11 years ago  |  last reply 11 years ago


Ipod charger? Answered

I have the correct 5v and the Ipod registers it but it comes up as charged, so I think its working like an external battery, but how do I get it to actually charge?

Question by Electric Spectre1 9 years ago  |  last reply 8 years ago


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 6 years ago  |  last reply 6 years ago


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__ 8 years ago


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 4 years ago  |  last reply 4 years ago


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 6 years ago  |  last reply 6 years ago


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 8 years ago  |  last reply 8 years ago


Fixing a charger

I was charging my Toro 20360 when my son tripped on the cord, jerking the wires out of the plug (mower end).  I checked with Radio Shack and they only have 4 connected prongs instead of single ones.  Where can I get replacements for the prongs that insert into the plastic plug in? MK

Topic by mazelady 5 years ago  |  last reply 5 years ago


Solar Chargers

I think this is where this belongs but everyone... i been looking for a good solar charger (obviously good), charge devices fast, holds alot of power, multiple slots to charge multiple devices, and atleast $50 online... or atleast $130 in stores (ya, i doint have much money), i thought i found good ones but i dont know whats actually good... so hope someone here can help me if it helps, devices i have i can charge are... hp touch pad, psp, smartphones, ps3 controllers, ect.    a laptop too but i realize or would understand that theres not really a solar charger for that (that ones not to important)

Topic by saiyankev 6 years ago  |  last reply 4 years ago


Capacitor charger

I want to build a fast simple capacitor charger with minimal components. i was going to builda dc to dc converter. but then came across this picture from here i am going to replace the switch with a 555 timer and transistor . does any body know if this circuit is any good or has any body built it

Topic by chrischavez 10 years ago  |  last reply 10 years ago


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 8 years ago  |  last reply 8 years ago


usb charger

Hi to all ok...there are so many instructables of this argoment that i can't understand! so i have a question. what are the volt and the amp that i need for charging without destroying my usb device? thx

Topic by Pacca 12 years ago  |  last reply 11 years ago


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 4 years ago  |  last reply 4 years ago


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 6 years ago  |  last reply 4 years ago


Batteries and charger? Answered

So I got one of those one cell battery bank that come also with a little crank generator. So far I took both of these apart to make one into a 2cell. So now these batteries are a parallel, my ? is if the voltage stays the same with the charging board and the mah is double this should not effect the board correct? and or the batteries. So far its been working both batteries reads the same voltage so the charging board must work. Now hear is the thing that I am concerned with, if I was to add 6 more into a parallel then all batteries would be the same MAH right. This should not damaged the board?

Question by dominick.j.pezza 4 years ago  |  last reply 4 years ago


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 3 years ago  |  last reply 3 years ago


Does anyone know how to charge this Canon XT battery without the original charger?

I left my charger behind at a friends house and need to charge the battery for my Canon XT. Any way to charge it with a regular battery charger? Thanks and Happy 2011!

Question by buffysissy1 8 years ago  |  last reply 8 years ago


Can a charger made for 1600mah batteries safely and effectively charge 2500mah batteries? Answered

I have several dead battery packs for my 18v power tools.  Planning to rebuild them and figuring I might as well upgrade their run time while I'm at it.  The original battery packs are 1600mah but I can get 2500mah battery cells that are the same size for about the same price.  1) Will I still be able to charge the higher capacity batteries with the charger that came with the lower capacity ones?  2) Will it charge them to their full 2500mah capacity?  3) Will it be able to detect when they are fully charged?  4) Will it give a false positive and think they are fully charged as soon as they reach the 1600mah of the original battery packs?

Question by etcmn 7 years ago  |  last reply 7 years ago


I want to download pics on my Motorola ph to my computer w/o having to buy a charger, is this possible?

I downloaded the motorola wizard but can't access it to request my pics be taken fr ph to computer.

Question by steph4me 9 years ago  |  last reply 9 years ago


quick two wires diagram,4 wires in one blk,green,white,red,other red, blk, cell phone?what goes together?

4 wires too 2 wires how do you put them together Blk,red,green,white the other blk  ,red to get a connection for cell phone charger have to use what i have right now

Question by monsterhung 7 years ago  |  last reply 3 months ago


Need help on battery set up

Hi All I am looking for a bit of help. I can't seem to find anyone to answer my question. We are working on an iot low power project that we plan to leave out in the field for up to 3 months at a time. We are using a Particle electron 3g module. It use 500ma per day when connected. It has two available power sources. 1 jst 3.7v port and 2 mini usb 5v - 12 v port. I am looking to make up a battery using lipo 18650 3.7v 2600amh components. Question 1. If I use the batteries in a 3s 13p set up I will have a 11.1v 38800mah battery, how long will battery last. ( I am getting the answer of 67 days from people but my question where dose the balance of the amp hours go as it is supplying power 11.1v and it only needs 5v to operate. How long will this take to charge and what is the quickest way to do this with out damaging the batteries. Question 2 Am I better using the 3.7v supply and stepping up the power on our mother board. If I do this I will build 39 of 3.7v 2600mah 18650 Lipos in parallel. How many days will this last for assuming that the step up module will work at 80% efficiency. How long will this take to charge and what is the quickest way to do this with out damaging the batteries. Sorry for such a long question but I can't get an answer. Peter

Question by Course Ranger 2 months ago  |  last reply 2 months ago


Looking for a LED curcuit that will tell me when my AA batteries are charged using solar cells?

All the DIY solar chargers seem to use a feel test or a multi meter to test if batteries are charged. Is there a curcuit utilizing an LED like those on manufactured chargers, that will let me know when my batteries are charged, and possibly put them in float mode or turn the unit off?

Question by heyfeaver 9 years ago  |  last reply 9 years ago


convert a DS car charger to a USB charger

I am changing my old DS car charger to a USB charger for my MP3 player. The charger puts out 5.2 volts, is that safe to use with my 5 volt MP3 player our should I add a resistor to the circuit?

Question by person1234 10 years ago  |  last reply 10 years ago


How do you change 3.7 V to 12V?

I have 2 cellphone battery brick chargers. I took one apart and found it to have 6, 18650 LiPo batteries connected in parallel to a circuit board to charge it. I have a project that requires 12 V and I would like to use these in some fashion. I was thinking put the two parallel battery bricks in series to get 7.4 V and step up with a DC to DC converter. Which one would be appropriate?  To charge the LiPo's I was thinking of parallel connecting the two circuit boards from the 2 cellphone battery chargers to a single wire connecting to a 5V cellphone wall usb charger. The usb charger supplies 5V at max 2.4A. Any help would be appreciated! 

Question by Mongalss 1 year ago  |  last reply 1 year ago


Industrial battery charger

Why the correct maintenance of batteries is essential to warn his exhaustion and to know when to replace it. With proper maintenance,can we avoid the battery failure? Im asking about battery chargers, Digital battery chargers, automatic battery chargers, traction battery chargers, Amperis battery rectifiers, battery charger rectifier! Thank you so much

Topic by GuGaC1 1 year ago  |  last reply 1 year ago


48V battery charger?

 So i got this 48V scooter from one of my teachers for free but he didn't give a charger. can i use my own 48V charger? thanks!

Question by theman123321 9 years ago  |  last reply 9 years ago


Making a smart charger?

Can anyone tell me how to make a smart charger for 9v nimh battery?

Topic by gungfudan 4 years ago  |  last reply 4 years ago


Toshiba laptop charger

I now have 2 Toshiba laptops, a Portege M300 and a Portege M600. My M600 is secondhand, and didn't come with a charger, however i discovered that the charger port is smaller than the charger port on the M300. Will i have to buy a new charger or is there anything i can do? new Toshiba chargers are, I believe, AUD$96.

Question by memyselfand1 9 years ago  |  last reply 6 years ago


laptop charger misfunctioning?

My laptop chargers output is ac 19 v. output was shorted by a wire i removed wire but now output is 43volts which part is misfunctionong?

Question by yhdesai 4 years ago  |  last reply 4 years ago


Camera USB charger

Does anyone think it would be possible to add a usb charger to my fuji finepix s5600.it doesnt even have a charger at the moment, i have to take out the batteries and put them in a charger and i always forget to put them back =D lol typical me.thanks for any help

Topic by sam3352 11 years ago  |  last reply 11 years ago


Ipod charger question?

If I were to cut an Ipod charger wire in half, and modded it to hook up to a battery, would it still work?

Question by Rock Soldier 9 years ago  |  last reply 9 years ago


AA Smartphone Charger

Is there a way to charge a Smartphone using a single AA battery? I already have a DC-DC booster to 5V but the current is not enough to charge the phone, can someone please help me with this?

Topic by Wihand 2 years ago  |  last reply 2 years ago


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 6 years ago  |  last reply 6 years ago


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 9 years ago  |  last reply 9 years ago


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 6 years ago  |  last reply 6 years ago


USB Charger Help?

I'm stumped. I built a usb charger with a usb plug in and a battery holder that holds 3 triple a's. I think the output is about 5.10 volts and it charges my flip phone but will not charge my iPhone 4s? Please Help. BTW I am extremely new at electronics. Thanks.

Question by DELETED_MakerNinja 3 years ago  |  last reply 3 years ago


USB solar charger

Assembled a USB solar charger followed instructions but it discharges instead of charging my smartphone what did I do wrong.

Topic by steve.revoir.9 4 years ago  |  last reply 4 years ago


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 8 years ago  |  last reply 8 years ago


Solar charger help?

I want to make a solar charger to charge AA's for my camera, my phone ( LG Banter), ipod touch, and maybe a DS Lite.  And if somehow I could detach everything except for the batteries for when I backpack.I have pretty much no knowledge on curcits, but I do want this to be a fast charger for the AA's. I was thinking of ordering and making a high-speed charger and making a mini-boost. But I'd like to spend less than $50 on this entire project. Any help is greatly accepted.

Question by CQBer 9 years ago  |  last reply 9 years ago