Is it possible to take the amp section from a old home stereo receiver/amp and use it to make a dc mp3 boombox ?

I have an 80's era PIONEER home stereo receiver/amp that I have just laying around. I was wondering if I could take the amp section from it and make a portable(dc) mp3 "boombox" out of it. I don't mind sacrificing the PIONEER to the "Greater Good " gods if this project is possible. I know the wattage would be more than I need but would love to do it just to do it. Any help is greatly appreciated.

Asked by hispanickausinpanik 8 years ago


help building boombox

Hi can someone please help. i would like to build a portable ipod boombox battery operated and can be charged with regular 240v with 2 usb ports so i can charge ipod while playing and i was thinking of building it in a plexiglass so it would be cool if i could add voice activated led lights in it. thank you so much for your help in advance.

Posted by qatami 6 years ago


Boombox Bluetooth mods

I have a JVC RV-NB1 Kaboom Series Boombox and want to mod it with a "Decoder Board USB/TF/ Reader IR Remote Bluetooth/FM Audio Board Module MP3". "Bluetoothing" this box is easy but installing this module involves a bit more ie. usb, TF slot, aux, FM. IR for remote any ideas as to connecting the rest. I can't seem to find a schematic from JVC. It has an FM tuner and can decode mp3,WAV,CDA,FLAC. CD's.Plus I want to add either a LiPo 4200mAh battery or a transformer for charging the module.any ideas would be greatly appreciated. Chuck Reed

Posted by CR34 5 months ago


Power my boombox

I have this power supply from a device that is not needed anymore. I have 2 of them (so i can harvest the other battery for another project, or to help run this one).. It is a backup battery unit designed to power my old device even if the power in the house goes out. I have some questions about the compatibility with a project i am working on. I'm sure it's obvious to most of you, but i labeled the parts in one pic so that i could pinpoint my question. A. is the battery terminal clips B. the feed of power to the device not being used anymore C. the plug that recharges the battery So then logically D is the board that feeds power from the battery, and E is the recharging unit. The pic isn't great, but there are 2 ribbons that attach D to E. I can also provide better pics if something isn't clear enough. My question is this... I am building a semi-small boombox with a car audio head unit. Since a car battery provides 12v, and the battery in this unit provides 12v, can i use this contraption to power my project? Can i simply cut off the adapter on the end of B, expose some copper, and attach to the power of the head unit? It seems simple to me, but my knowledge of electricity is VERY limited and i don't want to burn down my house or ruin my head unit. So far, i haven't paid a penny for anything and i want to keep it that way.

Posted by jjiont 5 years ago


Simple question, trying to make line in on casette-less boombox, can't find amp outputs

So I have this little radio boombox with no casette deck and I want to hook up my mp3 player to it. I'm trying to find where the amp outputs are so i can solder on a line in cord, anyone have info that would help me? I'll post pictures in the day time tomorrow when I can use the camera.  Thanks DIY'ers, DIY or die ps: I was thinking I could just take the spliced line in cord and probe around on the solder bumps until sound starts coming out, would this harm my mp3 player?

Posted by savetheworldaskmehow 6 years ago


need some help with my project (boombox)

Hello guys so i have been working on this project for some time (i know its not complicated) and i need some help with it. So i bought this old-school suitcase it was mainly made out of plastic so i glued some plywood  on the inside of the suitcase, ive cut  some holes for the speakers and vuala its semi-completed. So im using 4 mid-range speakers and 1 low-range speakers, so i yesterday i made the first sound test and to say the least the sound quality was terrible (i know it wont be a high quality sound boombox but i have made one some time ago). So my question / request would be if you guys have any suggestions maybe you know some cheap but decent quality amp or know anything about building speakers or stuff like that ( because i have pretty close to none experience in building them) BTW im using lepai lp 838 I would really appreciate any advices or suggestions. THANK YOU! ohh and sorry if this thread is missplaced or if my english is horrible.

Posted by VytasŽ 2 years ago


Can i line in thru the cd player on an older boombox ?i

I have a GE boombox from the late 80's early 90's in which the cd player stopped working years ago.I have been looking at the instructions on this site for line in thru the cassete player and was curious if it is possible to do the same thing except do it thru the cd lines going to the board .It appears to me that with most of the instructions i have read about the cassete conversion is that the cassete drive motor still runs after this conversion which sucks quit a bit of juice,which may not seem like a big deal to most but i go on canoe trips for 3-5 days at a time when no power is available other than the batteries I bring on the trip so it would be nice to line in and not have any motors that are not necessary running. If not i will use one of the great tutorials for the cassete way of doing it. Thanks dave

Asked by duckthis1 9 years ago


Boom box setup

Hi there I am putting together a diy boom box but cannot figure out how do I can nectar a 500w PC power supply and a 12v battery up so then I can use both of them to use the boom box I've figured out how to use it with just the battery but unsure on how to with the PC power supply please help

Posted by 18R4H1M. 8 months ago


how do you disable the am/fm radio on a boombox?

i work at a facility where guys can't listen to radio, but can listen to cassette tapes. We need to undo the radio part of the player so they can bring the boombox into their rooms.?

Asked by 9 years ago


AT-AT boombox and iPod player

In the past couple days not one, but two AT-AT music players have popped up. One in black and one in lovely spraycan gold. While each one is worth checking out, I just have to wonder if the second one, the gold one, was really put together over the weekend as a response. AT-AT boombox Golden AT-AT iPod dock

Posted by fungus amungus 9 years ago


What type of amp should I use for making a boombox? Answered

So I want to make a boombox similar to this instructable, https://www.instructables.com/id/DIY-Portable-Boombox-Audiophile-Quality/step15/Assembling-The-Boombox/   but more simplified.  The problem is I know nothing about speakers.  Im planning on buying 2 6.5" subwoofers with an RMS power rating is 150 watts and the peak power rating is 300 watts and the impedance is 4 ohms if that helps. I also want to run two full range speakers from the same amp and im planning on using two old ones I stripped from a radio, the only thing I know about them is that on the back of them it says 8 ohms and 2 watts.  I would also like a volume control on the boombox if that makes a difference. I have tried to look up what type of amp I would need but haven't had any success.  If someone could give me details as to what type of amp I should buy or point me to an instructable that shows how to make an amp suitable for this type of project it would be greatly appreciated.

Asked by texpert 4 years ago


Power supply switch for boombox project...

Could someone help me with some simple wiring questions? I've built a little boombox using a Lepai amp and some speakers. At the moment the back is off the box that houses the amp, so I can plug in a mains power adapter, but I've got a housing for 10 x rechargeable NiMH AA batteries making a 12v battery pack with maybe 20 amphours of life in it. I've only just ordered the batteries so I'll see. However, I was thinking that I'd still like to have a socket that I can plug the mains adapter into. So I was thinking about mounting a DC socket on the back plate, and some sort of switch to select the power source. 1. Does the switch need to be a 3 position one? There's an on/off switch on the front of the amp, so maybe a 2-way switch would be OK? 2. Does the switch need to be some sort of special one because it's switching power. Would something like this one do? 3. The switch has 3 terminals. How do I connect it up? I'll have +ve and -ve from the battery pack, a +ve, -ve, and earth from the DC socket, and a +ve, -ve and earth going to the amp. ...or maybe there's an easier way of doing it? Thanks.

Posted by contadino 5 years ago


Hard drive MP3 boombox?

I was wondering if anyone has and Instructable or has done this. I've searched Instructables and can't find anything like this at all, which really surprised me as I thought this would have been an obvious one to do. What I'd like to do is build a bookcase / boombox stereo from scratch using: 1. an old hard drive 2. some speakers 3. a small lcd to display info 4. some basic controls 5. usb port to update files on HD -or- make the HD removable 6. whatever other electronics parts are necessary. It doesn't need to have radio, CD audio or anything else. All I want is a 200GB or larger hard drive full of MP3's and a way to play them with decent fidelity and loud without using the computer. I've built lots of PC's and know computer hardware and software fairly well but have never used a soldering iron... but can follow complex instructions very well. Also I'm not sure if it can use a prebuilt interface by scavinging the electronics from a basic el-chepo MP3 player or if it would be better to use something like a VIA Micro-ATX motherboard with built in CPU and have something like a USB drive booting to a simple version of Linux directly to a media player interface? That seems like it would cost more in parts but be simpler than creating custom circuitry. But that is the way I would go if attempting this on my own. An all hardware & firmware solution somehow seems more elegant but that's beyond my current ability's. If I go with the Micro-ATX motherboard and Linux it could be done in a modular format that would allow the addition of other components latter such as CD player (with auto MP3 ripping), input and output to other components etc. So has anyone done this? If you haven't but have the know how do you want to collaborate via e-mail and walk me through it. I'd create an Instructable if so and give you full credit. Any and all suggestions, comments, rants, put downs, cheers, roars, hollars and yells appreciated!!

Posted by skonofvulcan 9 years ago


up and coming tut on a working boom box bag :) (only works on ipods )

hay every one just came across this site and i want to make a boom box bag so i thought hmm lets make a tut out of it so cant wait to start and upload just leave a comment if you want to know any thing bout and yes im using old skool boom box (reminder this boom box will only work for ipods)

Posted by sharifsta 7 years ago


What line or lines control the back light of this LCD? Answered

I have this radio/alarm clock/cd player with a really bright lcd screen even when it is off. In a previous question I asked how difficult it would be to disable the backlight without disabling the rest of the screen. They said it would not be difficult and to upload picks of the lcd screen with the radio disassembled. Well here it is.I have posted pictures of the front and back if you need anymore information or more pictures let me know.

Asked by Shadow13! 6 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 ^^'

Posted by Felixkeeg 2 years ago


BoomBox Soundsystem

I have been wanting to build a soundsystem from old boomboxes, I wanted to get some help on wiring it up...I feel somebody must have done something like this before somewhere, but I did searched the net and couldn't find anything. Any HElp???? Thanks

Posted by flite 11 years ago


Charge AND balance 4 Lipo packs? Series Parallel solution help.

I have x4 identical Turnigy Graphene Professional 5200mAh 3S2P 15C LiPo Packs w/XT60 - and I need 22.2v out of them for a portable boombox project.   I have x2 12S 30A BMS's to balance / charge on board and a 600w 48v 12.5 A power supply. By wiring up the battery packs in series then parallel to get the 22.2v output - if I then connected the BMS (either by directly wiring to each cell or using the pack balance plugs) would it would cause a short circuit through the balance wires?    The ideal solution would be a wall plug power supply that plugs into the (sealed) boombox and charges all of the batteries through the BMS's. Is there any way of achieving this through parallel charging (not a fan) or could I switch easily between the two wiring set ups?   I'm trying to avoid buying a £200 Lipo charger and connect the batteries directly or keep disassembling the boombox every time it needs charging. Thanks

Asked by MechaMatt 1 year ago


AUDIOPHILE? I have bad distortion/feedback?

Made a ghetto beats boombox from a old logitech surround sound system i had. And my issue is distortion in the subwoofer mostly and when i touch the wires going from the amp to the sub level knob i get really bad feedback through the sub and it will cut out also. I know the wiring is a cluster fudge and this was just a "going to wire it up to see if it works then protect it all later" kinda job. Do you think non insulated wire could be the culprit? Any input is appreciated. Def a newb when it comes to custom audio. I know car audio but this is def different. And on another note, I was thinking about just getting another amp to simplify it. Any suggestions?

Asked by ARGMISTER 5 years ago


Portable speaker boombox wiring help?

Hi guys, I'm currently in the planning/semi-begun-building stage of my first DIY electronics project, which is in the form of a portable boombox based around the lepai 2020A+ amp and the Sure APT-X Bluetooth 4.0 module (which both run off 12v). Despite searching the entire internet up and down, I just can't seem to make the electrical/power side of the wiring clear in my head. And to be honest, I'm a little worried about burning a house down/killing a battery and would be very grateful for some help. I'm looking at incorporating a cig lighter 12v socket for charging accessories like phones/audio players/whatever through a classic car to usb device as the stepdown, as well as a 2.1mm DC jack that can be used to charge the battery via AC mains (240v in Australia) as well as via a small solar panel. I am sort of hoping that I could be playing music and charging accessories while the solar panel or AC mains is plugged in... basically I can have anything plugged in/not plugged in/left overnight by accident and the house wont burn down. I have attached a mock wiring diagram that worked in my head, but I really do doubt if this is actually an acceptable circuit. There are also a couple of components I have left off there because I simply wasn't sure where to put them. The first is a simple power switch, so that when off nothing can drain the battery. Is this a simple case of wiring in line on the positive lead between the battery and the solar charge controller? The second is a small volt/ammeter (http://www.ebay.com.au/itm/251498991739?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649) that I would desperately like to use to know both when the battery needs recharging, as well as how much current the amp is drawing. I have absolutely no idea where to begin with this one. The yellow wire is scaring me even though the product hasn't arrived yet! Can anyone help with this? Am I at least on the right track? I hope you understand my misunderstandings, and are accepting to an enthusiastic novice's questions Thanks!

Asked by chemacky 3 years ago


Can I use this battery at the same time when charging?

Hi, I couldn't find the answer anywhere so i'm gonna ask - is this battery usable while charging at the same time?  http://www.ebay.com/itm/Good-quality-New-DC-12V-Portable-9800mAh-Li-ion-Super-Rechargeable-Battery-Pack-/130693998479?tfrom=131459486190&tpos=top&ttype=price&talgo=undefined I'm thinking about using this battery on my portable speaker with Lepai 2020A+ amp ..

Posted by Wauchy 3 years ago


install a switch to control or disable the lighting of an LCD display but leave it otherwise functional? Answered

I have a CD player with a really bright LCD screen that gets even brighter when it is turned on. Is it possible to disable the backlight or install a switch on it while leaving it otherwise functional? My first choice would be a switch of some kind but if that isn't possible I'd rather have no backlight but I still want to be able to read it when light shines on it. Some of these pictures were taken in the afternoon with the sun coming in the window to give you an idea of how bright it is. The others were taken at night so you can see how bright it seems at night.

Asked by Shadow13! 6 years ago


adding aux line in directly to boombox ampli

Hi guys i am Ramanta from Indonesia i have an old boombox, Sony CFS-1110s (similar mechanism with CFS-1100s) what i want to do is add an aux input to them. I have seen a lot of instrucrables about it, but nothing about this model. I find a similar unit here https://cocodrilabs.wordpress.com/2012/04/05/installing-an-auxiliary-input-on-a-stereo/ the aux in is conected directly to the IC Amps pin. I have the IC diagram, what i dont understand is this model have a dual IC8207k. One for each channel. TA8207K is a stereo IC, so how do i do the wiring? For single IC its just INPUT1-INPUT2-GND. In dual setting they have 4 input and 2 ground. I dont want to use any tape adapter since its sound terrible here i attach the complete diagram and schematic in PDF please give some tutorial, im a beginner in this kind of thing) hehe my email zramanta@gmail.com sorry for the bad english :D

Posted by ramanta 2 years ago


Help needed for a diy bluetooth speaker

Hi,I have 2, 10 Inch JBL speakers from an old music system. I dont have a photo right now, i will post i later. i am not sure if its a woofer or a speaker coz it have 2 magnets below. one over another and inside there is also a small speaker in the box. So i got 2 big speaker(or woofer) and a 4 inch woofer driver from a jvc multimedia system.I am kind of an audiophile and i want help to build a good boomboX with whatever i got. i am familiar with wiring and soldering and that kinda stuff. but i dont have anything to fabricate any circuit boards. So pls suggest me parts with low cost and those which can be bought inside India. I also have a bunch of 3.7 V rechargeable batteries from powerbanks and rc helicopters. But dont have a way to recharge them or use it for a regulated supply

Asked by Syst3mburn3r. 6 weeks ago


How do I get rid of the Hummmmmmm? Answered

In my latest project I've installed an iVO-Sound m1050 4GB portable media player in to a Magnavox D8443 Power Players cassette bay.You can hear a distinct Hummmmm in the speakers. If you touch the control buttons for the MP3 player the Hummmmm gets louder. The Hummmmm increases when you turn up the volume. Sometimes there is almost like a static-like sound to the higher audio frequencies. Sometimes the sound is more tinny. It's almost like a charge is building up maybe. When the music is playing the hum is less noticeable. The hum seems to get worse progressively the more you use the displaced controls.All controls that were displaced have been mounted in the old cassette players buttons. The tape circuits are off. The MP3 player switches with the Radio to the Amp. There is a charger but it was disconnected for now. The displaced USB port is extended to the back of the box where it also switches to the charger.What I have tried so far:- I have hooked up an Alternative MP3 player to the new Aux Input RCAs that also switch with the Radio to the Amp and the External MP3 player sounds great!- I made sure the tape heads and wires were all removed from the cassette compartment area.- I originally connected the audio with a headphone jack but now it is hardwired.- I removed the Metal back case of the MP3 player and that helped a bit. All the wiring was strung through the metal casing.- I have Tried an Audio System Ground Loop Isolator between the MP3 player and the Amp. That took away most of the hum but made the sound very "tinny" with almost no Bass.- I tried Ferrites on the Audio cable between the MP3 player and the Amp and the Power Cord and a number of other places. There was no discernible change. The cables weren't long enough to loop so I used several ferrites in series.- I have order a couple Audio Transformers so I can try and use them like the ground loop isolator if it is an impedance problem but I don't expect much different a result.- I have plugged the AC cord into it's own circuit on my breaker box and that seems to help a little.(My original MP3 player - boombox installation turned out great. The main difference is that most of the buttons were on the face of the MP3 player and only two buttons were displaced to the front of the box and that was the power and reset. The charger made horrible interference racket but you could just listen to the radio while it charged.)

Asked by Kepster 9 years ago


Philips boombox schematic

I am attempting to add an external jack to a Philips AZ 1564 boombox and need to know where on the amp c/b to tap into. This jack will be for my MP3 player, searching the internet has been fruitless. Does anyone know where I may be able to find this info?   Preferably for free....lol Thanks in Advance !

Posted by kalanikaau 7 years ago


Solar Boombox Upgrade

Ok so im looking to upgrade my DIY portable boombox for the 2nd time and one of the things i want to add is a solar panel to supplement the battery power from my 12v 7ah sla battery, that by itself will currently run the thing for about 3hrs at full blast. The new version will have Directed CSX-650 component speakers: (bottom of this page) http://www.lightav.com/car/directedaudio/directedspeakers.html and the amp will be one of these: http://shop.41hz.com/shop/item.asp?catid=42&itemid=43 , so what id like to know is what tech spec should i be looking for in a solar panel that would be capable of charging the battery while the boombox is not in use and will supplement the battery power to extend the run time while it is in use? Also will i need some kind of circuit/component to prevent overcharge of the battery? Oh and is there some kind of simple light/gauge i can wire in to show the charge level of the battery?

Posted by ambientvoid 6 years ago


subwoofer and normal speaker combo in same enclosure?

Is it necessary for subwoofer to be in an individual enclosure ? can't a normal speaker n subwoofer be in the same enclosure ? what happens if they are in same enclosure ? and what  "exceptional" happens if subwoofer is in individual enclosure ? thank you SO much in advance ! i really wanna know this thing

Asked by mcsk8rg 3 years ago


How to charge a Powerpack of 18650 li-ion cells 4s3p 14.8V?

I plan to make a portable audio system with 4 speakers and a subwoofer which are driven by a 12v TDA2030A 2.1 Amplifier. Everything is already packed in a small enclosure (approx. 30x15x30cm) and works fine so far. At the moment the amp gets it's signal from a 3.5mm audio jack and the power is provided via a 12v 1.5Ah wall wart. That's what I have for now. But that's not really portable right? So to complete my project I want to add 2 more things - a bluetooth receiver powered with 5v and of course I need to get this thing of the mains. That's where my questions actually starts. I've read tons of forum posts, instructions and watched a lot of videos about making a 12v battery pack but I'm confused with all that information. From what I've read 18650 Lithium-Ion batteries have an excellent power density and would suit my system best (small enclosure and portable). But of course I'm open for new ideas anytime. I planed to make the power pack out of 4s3p 18650's from an old laptop battery (don't have the exact data of them yet). So the pack would provide about 8Ah at 14.8V nominal. With a step down converter to 12v it't could power the amp and for the bluetooth I would use a car usb adapter to get the 5v needed. So far so good, but regarding the power pack I have a few questions. 1. Would a 3s4p (11.1V) arrangement be good enough to power the 12v amp since the 11.1V are in average right? 2. The biggest question I have is - How to charge that thing? As I want to have it as portable as possible, to be able to charge it anywhere from a normal power socket would be ideal. I know there are dedicated chargers for lithium batteries but they are quite expansive and not really handy to carry around. Is there any other solution to handle that? 3. BMS, PCB - I'm confused. From what I've read, to charge multiple cells they have to be in balance right? An over-charging and over-discharging can lead to fire/explosions and to prevent that a BMS is essential right? But first - how do i connect that BMS? Only to each of the parallel strings or to every single cell? Second, is it possible to use that BMS to charge the pack? Maybe also in balance? 4. For the case that the 18650 from the laptop battery are undercharged, where is limit to withdraw them and to charge them to balance with a TP4065 at 1A? That's it for now. Sorry for the long text and thank you for reading through it. I read so much on the net but didn't find the right answer for me.

Asked by Johnny-Pi 2 years ago


What battery should I use to power a DIY boombox using car audio components? Answered

I've been looking at car stereo boomboxes (DIY of course) and had a simple question on how to power the stereo: WHAT BATTERY SHOULD I USE? I plan on running a Kicker ZX300.1 mono amplifer to power three 4ohm SVC subwoofers (wired down to 1.53 ohms), and a wallmart headunit that I suspect draws around 10amps of power connected to Kicker DS60's. I'm also fairly certain that the amplifier draws 30 amps of power (300 watts / 10 = 30amps). If this is correct does that mean I need to have a battery / set of batteries rated at 40 Ah? (I know I need a minimum 12v to run car audio equipment, the question is based on the Amps Per Hour rating of the battery). I Guess what I am asking is does the power source need to be rated at the "x" Amps/Hour where "x" = the total amp draw of the system? Thanks!

Asked by ashap517 7 years ago


Perfect battery?, deep cycle, SLA, help!?

Hello, I am one of a group of people that has designed a mobile ice cream cart.  https://www.instructables.com/answers/Got-any-cool-ideas-for-our-Arduino-run-LED-dance-f/ We are currently using 6 of those 7.2 sla batteries. They are set up as a 24v system. But its not good. They are hard to charge. And have begun to swell. We want two smallish deep cycle batteries, set on two battery chargers. Does anyone know a good place to purchase such batteries? Say, 25 or 30 A/hr. Are there batteries for trolling motors? How much should we expect to pay? There are also larger SLA batteries, but I just don't think they are meant to be drains so deeply. (we play this thing for 12 hrs at a time) Thanks in advance! Tor

Asked by torclausen 5 years ago


Know of a cheap 24v li-ion to run a boom box?

Hello, I've been building boom boxes of various sizes using 24v amplifiers. I can never find medium sized 12v class d amplifiers, so I am forced to used 24v. My favorite amplifier is the tk2050. The inexpensive li-ion cctv batteries I use for my 12v amplifiers can't be used in series because the internal circuitry seems to cut out.  Can anyone help? Extra points for simple, cheap, light. Something around 7 Amp/hrs would be great. Maybe under $30. Oh, and how would you charge it? Thanks!!! Tor

Asked by torclausen 5 years ago


Philips schematics

Philips boombox schematic Inappropriate Incomplete Spam I am attempting to add an external jack to a Philips AZ 1564 boombox and need to know where on the amp c/b to tap into. This jack will be for my MP3 player, searching the internet has been fruitless. Does anyone know where I may be able to find this info?   Preferably for free....lol Thanks in Advance !

Posted by kalanikaau 7 years ago


How do I install a rechargeable battery into a boombox or device that can be charged via ac adapter?

How do I install a rechargeable battery into a boombox or device that can be charged via ac adapter? I'm building a boombox and want to have an internal power supply that can be recharged via  the ac adapter that comes with the battery.  I want to be able to charge it without having to remove the battery.   I'm guessing I need to wire in some sort of switch that switches between power mode and charging mode,  but I really have no idea how to go about it or where to find the relevant information on how to do it.  I'm an electronics noob so any input would be appreciated.  Thanks

Asked by banjopoker 5 years ago


Am I likely to find a source of 12v inside a CD boombox? Answered

I'm planning on building my own kitchen under-cabinet stereo using parts from an old boombox and a CD-ROM drive.  I've been looking at 'ibles like this and this for inspiration.  I know that the CD-ROM drive will require both 5v and 12v input, and I don't expect to have much trouble finding 5v (or something higher I can drop down with a 7805).  What I'm concerned about, though, is finding 12v. Eventually I'll be poking around in there with a multimeter, but I was wondering if anyone can tell me if it's likely that the existing CD player in the boombox would have run on 12v, or something lower.

Asked by yoyology 8 years ago


where's a good site for Philips wiring diagrams/schematics?

looked hi and low online to no avail, Philips cust. support is no help at all Lkg. for a boombox schematic in particular

Asked by kalanikaau 7 years ago


Rewiring a boombox headphone output to be an Ipod input?

I'm rewiring an old boombox to be able to play music from an ipod. Since it doesn't have an input anywhere on it, I've decided to rewire the headphone output to act as an input for my ipod. I've already gutted the tape player. The headphone out is attached to a circuit board which then connects to the main board, which sends the music to the speakers. I will change the old headphone input wiring to go to the old tape input(same wires). The only problem I can forsee is the circuit board which connects the headphone jack to the wires. Will it keep trying to send music out, or will it let the Ipod's music pass back into the main board? Connection diagram: Ipod -> Double-male audio cable -> Headphone jack -> Circuit Board -> 6 Black wires -> Main board's tape player input -> Speaker

Asked by 8 years ago


How can I wire my boombox?

I need help wiring a car head unit for a boombox I am making. The problem that I'm having is that to save my settings, the head unit needs a constant 12v supply. Currently, I have a computer power supply going to the head unit supplying the 12v along with 5v for a PC fan I am using to help with cooling. The problem is that I am planning on putting in a motorcycle battery and switching between the power supply (wall power) and the battery (portable). I need all components to run off of either power source and to be able to switch between them without overloading the system or losing the constant 12v. Please help and sorry if that didn't make sense or was too complicated.

Posted by eliweitzman 2 years ago


Why has my instructable not been added to the contest?

I submitted my instructable for an iPhone boombox to the Shop Bot challange and the Make it Real challange. It should be what both are looking for in an entry. It was only accepted to the Shop Bot challange. Other instructables made today were accepted which makes me want to ask since I submitted the entry several days ago. Can I only be in one contest at a time? https://www.instructables.com/id/iPhone-Boombox/

Asked by MTriest 6 years ago


inline volume control

Hi im ramanta from indonesia i try to add an aux in to my old boombox, the reference from here https://cocodrilabs.wordpress.com/2012/04/05/installing-an-auxiliary-input-on-a-stereo/ i already got it working, but the problem is the potentiometer(volume). Only one channels work my boombox has 2 IC Amp, one for each channel. I already try to connect the source(ipod) directly to the amp (without the pots), work like a charm. But the sound is too loud and distorted

Posted by ramanta 2 years ago


VHS Camcorder, Overhead projector, Boomboxes, and some other stuff.

Hey, I recently contacted my school (I'm in 9h grade) asking if they had any old equipment i could have, and they said yes. I have decided that i would *only* take 2 overhead projectors (you put a 'transparent sheet on, and projects) 3-4 boomboxes, and most importantly, a VHS camcorder. I just couldn't let that camcorder go to waste, so i decided i would take it, but now I'm wondering, what can i do with it? Also, for the overhead projectors, any ideas what i could use them for? I know, i can get the mirrors/lenses/bulbs, and fan and everything in them, but is there anything i could use them for (i know about LCD overhead projector, anything else?)

Posted by schumi23 6 years ago


Is there a way to make ac powered computer speakers to dc ?

I'd like to use a pair of ac powered computer speakers and use them as a portable dc powered "boombox" for mp3 playback. Any detailed ideas out there????

Asked by hispanickausinpanik 8 years ago


Looking for cheap LiPo 3s low voltagle cutoof/balance circuit

Looking to add portability to a boombox project I built. Want to just grab a LiPo r/c pack and use a 3a 12v SMPS to charge it with. Know of a good battery protection circuit? This will be going to a non tech minded friend. So I'd like him to just be able to plug in the PSU when he is home without the worry of overcharging and be able to run it until the low voltage cut off is hit without worrying about killing the batteries. Any suggestions? It would be for this https://www.instructables.com/id/DIY-Boombox-Ghettoblaster/ Thanks

Posted by Cancerkazoo 5 years ago


Usb Flash drive player?

I've seen some flash drive players through a boombox... where you stick the flash drive and it plays the music files in it. i was looking for something like that but instead of boom boxes , i could change the output or speaker device to use... for example id like a portable speaker or a headphone.

Posted by tanamaze 6 years ago


I need a compact rechargeable 12 volt power supply?

Hey, I am building a boombox and need 12 volts and 1.5-2 amps of clean rechargeable power, I can build moderatly complicated circuits so help me out please :)

Asked by sdurham4 3 years ago


Diy BOOM BOX HELP!!! ??? Transformers & Amplifiers ? Answered

I am wanting to make a portable boombox for my dad i have two 25 watt car speakers and am looking to make my own AMP, i have a transformer from a Memorex home stereo and was wondering what else i can use from this stereo to construct an an amp if anything?

Asked by ZachS78 1 year ago


Can I tap into these audio circuits by desoldering Op-Amps and putting wires in their place? Answered

In my continuing quest to make an under-cabinet kitchen radio (see Chapter 1, Chapter 2, and Chapter 3), I'm looking at the original PCB for the boombox I'm hacking. Based on the work of three predecessors (Convert a radio tape player..., How To Make A Audio... and Play and Recharge Ipod...) I'm looking at ways to bring in audio from two sources.  I'm putting in a CD-ROM drive to be my CD player, and I'm adding a headphone jack for my BlackBerry so I can listen to MP3s, Pandora, and streaming radio. It appears that there are two ICs that act as preamps in the boombox, one for the CD portion, and one for the cassette.  See the pictures for where they are located on the board.  Photos 3 and 4 are pinouts for these ICs as found online. I want to remove the BA4558 and solder in a connecting cable for the audio out from the back of the CD-ROM: Left to OUT1 on the board, Right to OUT2, and ground to VEE. Likewise, I want to remove the BA3308 and solder in a cable with a male 1/8" headphone jack to plug into the BlackBerry.  Left to OUTPUT1, Right to OUTPUT2, and ground to GND. Then I'll be able to switch the selector from the boombox to CD and play CDs, and to Cassette and listen to the 'Berry. Will this work?  What are the likely pitfalls?

Asked by yoyology 7 years ago


Charging and Discharging a battery at the same time?

I've been researching how to make a solar powered boombox and have a few questions about protecting the battery. from solar panel to the battery: i understand that a charge controller is necessary to regulate power to the battery, as well as prevent overcharging it. from the battery to boombox: most projects use an inverter directly from the battery.  I'd like to avoid this step and pull dc from the battery directly to the battery box in the stereo(the ac input of the stereo converts it back to dc again anyway i think).  From what i've read, inverters have a protective circuit that prevent the battery from becoming dangerously undercharged as well as regulate power from the battery.  Could i just build one of these discharge controllers and be done?  Is a discharge controller necessary? cliff notes: what dangers are there in charging and discharging a battery at the same time, and how can i prevent them?

Asked by allmondjoy87 7 years ago


How to integrate a rechargeable 12v battery?

I am building a portable boombox and trying to figure out how to integrate a 12v battery into it that can be recharged using a input jack and the AC adapter charger that came with the battery., without having to disconnect the load.   Is it as simple as connecting both the charger and the load to the battery?  Would I need to wire in a switch to disconnect the load when I plug in the charger?  I'm an electronics noob so any help would be appreciated.  Thanks.

Asked by banjopoker 5 years ago


Leave LI-on battery turned on?

Hello! I bought a li-on battery ( http://m.ebay.de/itm/281697770691?varId=580703135130) and it has this little switch. I want to build a boombox and dont want to open it everytime to turn it on or off. I also dont want to rip the switch appart because i sind want to destroy the batterypack. Can i leave it turned on and place a switch between the circuit and the batterypack? Or will i destroy it if i leave it on all the time?

Posted by Unirox 2 years ago