Portable

I want to know if it is possible to convert something you plug into a wall and hook it up to a 9v battery. 

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


Making a portable turntable portable

Hello all, This question is definitely burning an I hope everyone can help out. I have a couple of portable turntables but only one is actually portable. They can all be plugged into the wall but only one can be powered by 6 "D" batteries. The mission is to convert/adapt one of the plug only ones to run off batteries. They are about AC 117v-120v/5.5w-6w. Is this as easy as soldering a + and - cable from a diy battery compartment to the circuit board. Or will something be needed in between the batteries and the board to make the power acceptable? Also how about adapting it to take a Li-Ion(or similar) battery that could charge when it's plugged in? This sounds like it would be more complicated though. Just getting one to run on batteries would be grand. Thanks for any and all info.

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


Portable hole?

I recall there was an instructable about making a portable hole, or optical cavity with lights in it. As far as I knew, it was used as a coffee table, but I can't find it now. Has it been removed?

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


Portable TV

(I hope this is the right place to ask this) I have a question on what I would need to add a TV screen to my TV Radio. It picks up the sound for TV, but how can I tap into that and add a screen?

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


Portable Chargers

Post your comments or questions

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


portable tv

I really would like to try and make a portable tv I am wondering if it was possible I have a decent lcd screen out of a car gps but the only markings on it are vdd , avdd ,vgh ,vgl, pol,vcom, gnd and there are some contacts that say q1 ,q2 ,q3 r0, and c1 I was wondering if somebody could tell me how to connect it to a chip and if it would be possible to make a receiver out of an old VCR

Topic by tong-b 11 years ago  |  last reply 11 years ago


Portable mister

<br> Saw this on Lifehacker today.  I would to see someone come up with a way to convert this to a PORTABLE system!  http://www.costco.com/Browse/Product.aspx?Prodid=11293723&search=misting%20fan&topnav=&Mo=0&cm_re=1_en-_-Top_Left_Nav-_-Top_search%C3%A2%C2%8C%C2%A9=en-US&Nr=P_CatalogName:BC&N=5000043&whse=BC&Dx=mode%20matchallpartial&Ntk=Text_Search&Dr=P_CatalogName:BC&Ne=4000000&D=misting%20fan&Ntt=misting%20fan&No=0&Nty=1&Ntx=mode%20matchallpartial<br>

Topic by mazelady 8 years ago  |  last reply 8 years ago


Portable 5.1?

Hey guys, I've got a set of 5.1 speakers from an old non functional home theater system that I'd like to make into something portable, maybe even able to play sound from an iPod or computer. However, I'm a complete newbie to sound equipment and wiring, so does anyone have any suggestions as to how I could go about that? I know I'm not going to keep the 5.1 effect, but just having a portable system with that kind of power behind it would be pretty cool. Thanks in advance.

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


Portable hydropower

Hi! I am in a senior in high school and am required to do a project as a part of my stem class. I am planning to make a portable hydropower power bank that someone could use when they're camping to charge their mobile devices. The problem is I don't know how to go about actually doing this. I was planning on making a small stator and rotor for my generator but after further research I found out that I could use a motor and a diode instead. Any help on which would be better would be greatly appreciated. I also am confused on what type of battery to use(it will be inside my device and will be the power bank for charging devices). I was planning on using a 5000 mAh, 5V lithium polymer battery, but am not sure where to buy one(If u just search 5000mah 5v battery, the responses come up with 3.7V.  I will also need at least 2 usb charging circuits. Honesty any guidance in what I should would be helpful. Thanks! If your looking for examples of this I would look up the blue-freedom portable hydropower.

Topic by sonnyp99 2 years ago  |  last reply 2 years ago


Portable speaker

Hi, I need some help building a portable speaker with a td3116 2x50, 1x100 amp. II want details on how to build a 24v rechargable battery for my project...

Question by VassilisT 2 years ago  |  last reply 2 years ago


Portable Stereo?

Ive seen how everyone has made a portable backpack stereo and i think that is a great idea but why not use a regular cd player with all its internals and speakers instead of going out and having to buy a separate amp and speakers and connect it all. I have a cd player disassembled and i want to replace the cd drive with what would be a line in to my ipod could this be done so i can use everything else but the cd drive?

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


Portable speaker?

I have a 12v battery and a radio head unit along with 2 JBL speakers that are 70w rms 210w peak and 4 ohms  will this work if connected up?

Question by Jackyboy95 4 years ago  |  last reply 4 years ago


portable artist bench?

Anyone have easy plans for making  a portable artist's bench (aka "horse")?  I mean, like really, really portable for a woman who has neck and shoulder issues?  I saw an amazing one on eBay, but it costs $250.00.  Any ideas? Here is the eBay link, if you would like to see what I'm talking about.   http://cgi.ebay.com/ws/eBayISAPI.dllViewItem&Item;= 270363834810&Category;=41204&_trkparms=algo%3DLVI%26its%3DI%26otn%3D1#ht_1531wt_1139

Topic by LauraGrimes 8 years ago  |  last reply 8 years ago


Portable NES Emulator

Below are my rough designs for a portable console that runs a NES emulator, built inside of a NES controller. I don't exactly know how I would do it, but I have a EXCELLENT screen that would work perfectly.

Topic by NYPA 8 years ago  |  last reply 8 years ago


Instructables for portable devices

Is it possible to get a portable version of instructables for portable devices or for computers with small screens? Thanks.

Topic by Yerboogieman 9 years ago  |  last reply 9 years ago


Portable Drawing Easel

I designed a portable easel out of two pieces of luan (1/8" to 1/4" plywood).  I originally intended to sell them, but decided I didn't really enjoy making them in production levels.  The time vs. cost factor didn't really pan out. Either way, this is a design that might make an artist loved one happy.  It is fairly quick and easy and has a bit of style to it, I think. I added some molding at the bottom to act as a sort of pencil or brush holder.  Just some metal rings to hold the two pieces of wood together and a SWEEEEET woodburning on the front with my name--feel free to put someone else's name on yours! What you don't see in the photos is a leather strap with a small dowel at the end that fits into two notches--one for holding the two sides of the wood from splaying apart when it's in easel mode, and another for when you want to keep it closed for carrying it.

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


Portable change table

We are running in partnership with other agencies and the City of Toronto, Parks Forestry and Recreation an accessible swim program for people with physical disabilities. Many of our participants require that they change in a lying down position and thus require a "change table". At this point we are looking at two locations that require this. Challenges include storage as storage space is of high premium at the pools. It would have to be at a height that would be comfortable for the support staff. It should be wide enough to be able to turn a person on their side safely. Sturdy enough to be able to handle up to 350lbs safely. Should be folding (for storage), and have wheels that lock so it can be moved easily. We assume wood is the best material for this (or easiest to work with), but we are open to suggestions. It should also be long enough. We have not come with specific numbers (how many inches/cm wide or high e.g.). For this some of us involved in this program need to discuss the details. However, you may have some questions too, so if you let us know we can provide answers to your questions. A few years we purchased a portable massage table. However, it is not wide enough to accommodate some of our participants with being turned safely. About Tetra Tetra is a non-profit organization that recruits skilled volunteers to create customized assistive devices for people with physical disabilities. See our instructables group at: https://www.instructables.com/group/tetra/

Topic by chuirich 6 years ago  |  last reply 6 years ago


Portable dvd player?

Hello, i have a portable dvd player that isnt working right any more. I was just wondering if anyone knew anything cool i can make with it. I just found this site and im really excited! Ton of great things on it. Thanks if anyone has any ideas would be great!

Question by DTWalz21 10 years ago  |  last reply 8 years ago


Portable Camping Stove

I'm in the market for a portable camping stove and I came across this 2 burner WITH a STOVE! This thing looks awesome, assuming you have the space to tote it around with. I have declared 2010 the year of camping for our family. I'm in the process of gathering camping lists and preparing for my buying spree. Any suggestions welcome!

Topic by lebowski 9 years ago  |  last reply 1 year ago


Portable Xbox 360

I saw the website of Ben Heck (benheck.com) and I was wondering if it is really necessary to modify the heatsinks for the GPU/CPU and replace the fans. I am planning on making a portable xbox 360 in an alluminum suitcase with the LCD screen from a computer monitor. Is there any easier (legal) way to wirelessly obtain xbox live? What resolution monitor should I get? Any advice?

Topic by MattGyver92 10 years ago  |  last reply 7 years ago


Portable Sega system......?

Could somebody possibly do, or make an instructable on how to make a portable Sega system, kinda like the one in the following link?:  https://www.instructables.com/id/NES-in-a-Cartridge/       If it could be made to play the original games, and be hooked up to the TV, and be run on an outlet too, that'd be cool. I'd do it, but I really am not good at doing things with electronics.     But if someone can do something like that, that'd be sweet!

Topic by kenizl86 7 years ago  |  last reply 7 years ago


portable audio mixer

Hey everybody I had a little idea but i am not so good in this sort off things is it possible to make an portable audio mixer on batteries for mixing with 2 mp3-players if someone has an idea can he tell me how to make this it should be great because I always play music with my friends but it should be nice if we can mix music (I am sorry for my bat English I am from belguim) Sompie

Topic by sompie 12 years ago


Portable 12v Power?

I need to power a 12v dc Digital Photo frame in an interior area with no available plugs. I can charge it at night, but need it to be self powered during the day. What can I use as power? I was thinking of possibly a Computer battery back-up or a portable battery used for jump starting a car. Any and all ideas would be helpful. Basically making a battery powered digital sign board. Thank you!

Question by larry925 3 years ago  |  last reply 3 years ago


portable led strip?????

I want to wirelessly power this led strip, is that possible? i also could use a usb, would that work? http://www.amazon.com/LEDwholesalers-Controller-2034RGB-3315-3215/dp/B0040FJ27S/ref=sr_1_4?ie=UTF8&qid=1396659149&sr=8-4&keywords=led+strip

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


Portable Work Space

Hello,  I have been kicking around this design for a portable work bench. My profession is product design however I am a DIYer by nature (mostly wood working, furniture and the occasional home renovation). I would always loose count of the number of trips I would make back and forth to my shop in the garage.I thought that a portable table that could fold into a hand truck would be a good solution to design, build and possibly sell. I have teamed up with a metal worker in the PA and we are considering crafting a few of these tables however I would like to ask the community if an idea like this was worth anything. If you are at all interested in something like this, could you please take this very short "yes/no" survey so that I could tally and see if there is enough interest in this idea. Also, could you please let me know what you think of this idea? If enough people think this is worth the time I will build a  few tables and post pics.  Survey Link: https://www.surveymonkey.com/s/RX63VFQ Thanks, -S

Topic by sricci714 4 years ago


Portable car stereo

While waiting at a red light, I noticed that inside of a FedEx truck, the driver had his own portable car stereo in the cab with him. It consisted of a wood box with three 3.5" Dia speakers on the side with the stereo (what looked like an older model) sticking out of the top of the box, vertically. I'm guessing he had it wired for a cigarette lighter adapter to power the unit and the box was held in place in the cab by bungee cords. It looked like a great way to recycle old car electronics, wished I'd thought of it when I had to drive cross-country in a Uhaul with only an am/fm radio.

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


Portable speaker project?

Hello I am looking to build a portable speaker with some old speakers I found around my house, powered with batteries. I want to know how much voltage my speakers need to work, on the speakers casing it says 5 watts and 4 ohms. Is there an equation I can use to find out what the voltage is of my speakers based on the watts and ohms level?  Based on my research it looks like I will need an audio amplifier, can you suggest a cheap and cost effective audio amplifier and leave the weblink on the comments.  Please keep the reply basic as in not a tech wizard lol thank you. 

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


Ultralight Portable Greenhouse

I have always wanted to grow a dwarf fruit tree or tropical tree (10-15 ft tall), but living in a townhouse I don't have room to winter a tree indoors. I was wondering if anyone has ever heard of this being done for a single tree? Kind of like a "tree phonebooth" for winter, potentially with a heater run from my outdoor electrical outlet. Any thoughts on where to start? If we can get a theory together I will build it and post it.

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


Portable Homemade TV Answered

I built a TV from an old laptop screen and one of those LCD control boards you can get from eBay but I’m curious how to go about adding a battery to it to make it portable. So, my question is, how do I go about battery safety and how do I control charging and isolation? For example, if I plug the TV in because the battery is dead, do I just have a charging board between the input and battery and let the charging board take care of the rest? And the same question is applied to when the battery is at peak charge but I don’t want to use the battery just simply plugged in. The battery is a 12v 2A lipo and I don’t want any fires. I’ve thought about adding a switch to simplify things but that’s inconvenient and armature I could make a circuit that would cut off the flow when the battery is at peak I suppose but I’m not sure of the schematics or if that is the right approach. I’m good at building just not figuring this stuff out….

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


Portable Storage Drive

I have a Nikon D200 Digital SLR that uses a CompactFlash (Type I/II) MicroDrive and when I'm in the field I take lots of high resolution images that takes a long time to download through the USB port of a laptop. I would like to be able to just carry a self-contained portable hard drive (i.e. 2.5" hard drive in an enclosure) with it's own battery source and just be able to insert the MicroDrive to a card reader connected to the enclosure and download all the images of the MicroDrive without the use of a laptop. A commercial version already exist but they are very pricey like the Epson P-2000. Basically I want the same functionality of the Epson P-2000 but I want the option to use whatever size drive I choose. How much battery would I need to power a hard drive? Would I have to use some sort of circuitry to transfer the images from the MicroDrive to the hard drive with a push of a button? Does anybody already have any instructions on how to build this?? Any help would be greatly appreciated. Thanks

Topic by DickDastardly71 10 years ago  |  last reply 10 years ago


Portable change table

We are running in partnership with other agencies and the City of Toronto, Parks Forestry and Recreation an accessible swim program for people with physical disabilities. Many of our participants require that they change in a lying down position and thus require a "change table". At this point we are looking at two locations that require this. Challenges include storage as storage space is of high premium at the pools. It would have to be at a height that would be comfortable for the support staff. It should be wide enough to be able to turn a person on their side safely. Sturdy enough to be able to handle up to 350lbs safely. Should be folding (for storage), and have wheels that lock so it can be moved easily. We assume wood is the best material for this (or easiest to work with), but we are open to suggestions. It should also be long enough. We have not come with specific numbers (how many inches/cm wide or high e.g.). For this some of us involved in this program need to discuss the details. However, you may have some questions too, so if you let us know we can provide answers to your questions. A few years we purchased a portable massage table. However, it is not wide enough to accommodate some of our participants with being turned safely. About Tetra Tetra is a non-profit organization that recruits skilled volunteers to create customized assistive devices for people with physical disabilities. See our instructables group at: https://www.instructables.com/group/tetra/

Topic by ijdoc 6 years ago  |  last reply 6 years ago


Is it hard to build a gamecube portable?

Me and my friend  want to make a GameCube portable. We would like to know the things we would need to know to build this. Whats the level of difficulty? How much money would we need to spend? Please give us all the details you can. Thanks. 

Question by PortableMaker 7 years ago  |  last reply 4 years ago


Best portable power option for amplifier board?

I plan on modifying an old bookshelf speaker into a self-powered speaker with iPod Dock, radio and 3.5mm inputs. I have pretty much all of the plans down, but I don't know what would be the best RECHARGABLE power option to use. (That's where you come in :3) I will be using this (http://www.ebay.ca/itm/251137327317?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648) amplifier board, and it will probably not be used too much (Camping mostly. No more than a few hours a day, and there is electricity on site if needed).

Question by ap1922 5 years ago  |  last reply 5 years ago


geeks of instructables i call upon you help me make a powerful, portable, long -range emp generator

It needs to be cheap, long range, easy to make, no cameras, portable, and preferably directional                                                    and how can i make an emp shield

Question by DELETED_madscientist167 8 years ago  |  last reply 8 years ago


How to make portable apps?

How can I make portable apps from games like "call of duty" or "last Chaos"? People have been showing me games like this on thier USB drives and they can be played on any computer without installing... How is this so...?

Topic by gold3nwing 9 years ago  |  last reply 9 years ago


Make a portable fire pit

This portable fire pit tutorial over on Design*Sponge is sweet. Great photos, clear instructions, and a lovely item as a result. If you want a nice bit of flame to keep you company, check it out. How to Make a Personal Fire Pit For Cheap! via design*sponge

Topic by fungus amungus 8 years ago  |  last reply 7 years ago


Wikipedia on Portable DVD Player? Answered

I was just wondering if there was a way to put the wikipedia dump file onto a portable DVD player? Maybe a set of dvds to plug in or hooking up a hard drive to it? Thanks!

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


Screen and Speakers for Portable Console

Hi, I am looking into building a portable gaming setup for my younger brother from, presumably, an HDMI monitor with built in speakers. The catch is I'm shopping around for material to build the casing out of to hold the xbox and to hinge to the screen and I'm having a hard time figuring out what would be an optimal, sleek yet not too expensive option. Anyone with ideas?

Topic by Postnoctum 6 years ago  |  last reply 6 years ago


Portable software for veroboard design?

On the hunt for software that will allow me to do layout designs for veroboard circuits, however all I've found requires installation and doesn't have a portable version available. Does anyone know of any that has a portable distribution, bonus points if it contains breadboard and PCB sections too. Forgot to mention, Windows user here. Thanks!

Topic by Auraomega 6 years ago  |  last reply 6 years ago


Tiny portable printer - Will pay

Hello everyone. I need someone to come up with the plans or the finished product of a really small portable printer around the size of a Galaxy SII (or iPhone) but twice the height (thickness) at most. It must be able to print on a strip of paper about 2-6cm wide. It must be able to print a dot-matrix like text. The size of the text must be somewhat adjustable. It must print ASCII characters and maybe some symbols. The line of text to be printed will look like this: ID0001||25AUG{}12:55 No need for paper feeding or anything. It should operate like: place the paper in the tray, press a button/buttons, remove the paper. The ink should last for at least ten prints before replacing and the device must have a rechargeable battery. I would prefer if you make an instructable out of it as well but it is not mandatory. If you can deliver kindly send me a private message here with your offer.

Topic by izybit 6 years ago


Palm Portable Keyboard help

I am looking for help[ on a posible project.  I have a Toshiba laptop that I love.  I have a Palm Portable keyboard from an old Palm VIIx that died years ago.  I am now wondering if there is any way to convert the Palm keyboard for use with my laptop.  Does anyone out there have any ideas?Thanks,Stoff

Topic by Stoff 9 years ago  |  last reply 4 years ago


more powerful, portable amp

I was messing around with some op-amps, building variations of the CMoy amp, etc. But I became depressed quickly -- these ICs' data sheets say that at the safe maximum of 15 volts, they can only pump out around 1/4 watt of power on a single channel! Well, i have a full range driver that really needs more power to sound decent. I was wondering what the normal way of constructing an amp would be if I were looking for 5 to 10 watts of power. *edit*: i'm not looking to run this thing off of batteries... i'm sure at 10 watts, a couple of D cells would get drained rather quickly... I recently cracked open an old 4.1 computer sound system (by microlabs) and scrapped the 5 drivers (4 satellites and a 5 inch sub), two big 3700 uF caps, and two JRC4558D dual op-amp ICs from the amplifier. I read up on the JRC chip (actually, just the data sheet from the RC5448D, the texas instruments flavor, i guess the JRC is discontinued) and it seems that this thing only puts out a max of 200 mW per channel, and typically around 90 mW. Ok i know those speakers didn't get THAT loud without distortion, but i am CERTAIN it was more than 800 mW for those 4 satellites. I am a new computer engineering student, so i can understand the physics behind the electronics, but i am nowhere near the level to start reverse-engineering that amp board. So how did these speakers get driven so hard? THANKS for reading!!!!!

Topic by samurai1200 11 years ago  |  last reply 11 years ago


Can an Xbox 360 be &quot;portablized&quot;? Answered

I love videogames. I am going to buy an xbox 360 soon. The only problem is that i want to be able to play in the car, in the backyard, wherever without having to mess with a buncle of cables and a huge TV. This gave me an idea. A modder named Ben Heck (http://www.benheck.com) creates portable game consoles from existing ones. I could possibly use the motherboard and extend the ports, put it in an aluminum suitcase, and use an LCD computer monitor for the screen in the lid. I already have most of the materials I need, but I have a few minor concerns. I don't want the unit to overheat leaving me with a dead xbox. I don't know what resolution LCD monitor I should try to get. And I'd like to know if it's possible to hook up a battery that could power the completed unit. Can anyone give me some advice?

Question by MattGyver92 10 years ago  |  last reply 7 years ago


Portable speakers in a PS2 Controller?

Using 2x2cm and 2x4cm speakers (4speakers total) preferably with a basic crossover and 4xAAA batteries and a 3.5mm jack for input. Perhaps a volume switch too (presumably this is a simple matter of a variable resistor. I have an idea of what speakers to use... two emac speakers and two 2cm Mylar speakers from maplins. Any help on what components I need ie. amps and capacitors would be great, or pushes in the right direction at least. thanks alot Matt

Question by blue-cat 9 years ago  |  last reply 8 years ago


Portable raised toilet seat

We are in search for ideas and/or off-the-shelf solutions for a mobility and toileting issue in response to the following request: "When I go out visiting or out on a shopping trip I often find the toilet seats too low, so I would like to see if a portable raised toilet seat could be designed. All I can find are the raised toilet seats where the existing toilet seat needs to be removed and then the raised toilet seat needs to be screwed on. [A possible solution would be to] create an inflatable one that can be attached to an existing toilet seat with something like velcro and maybe have a stiff ridge that can be secured under the existing toilet seat." Happy to hear your ideas! About Tetra Tetra is a non-profit organization that recruits skilled volunteers to create customized assistive devices for people with physical disabilities. See our instructables group at: https://www.instructables.com/group/tetra/

Topic by chuirich 6 years ago


portable phone speaker/mic

Ok, so I have a portable phone and would like to create some sort of hands-free speaker/mic for it. I'm not sure how to go about doing it and I'm not very internal-electronic-savvy (i.e. chipsets, soldering etc). Ideally, I would assume it should be connectible via the 2.5mm headphone jack. I have an old 2.5mm headset. It's got an ear bud and flexible arm microphone and connects via 2.5mm jack. I should also have some old computer speakers lying around somewhere. I assume that's all I should need. I would like the microphone to be part of the device and be functional, but not sure if it will pick up my voice from a far distance. I'm not too concerned about looks/style, but would be a nice addition. Functionality is my first concern right now, although I do have a few old Fossil watch containers that I could put the speaker(s) in and some sort of dock or rest for the portable phone would be nice as well. If soldering is involved, I will need very detailed instructions. Thanks again! I hope someone can help me. If someone knows of a fairly inexpensive product, I would be willing to buy (since I'm not very soldering-savvy as I said above), but I think this would be an interesting project to build.

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


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 6 years ago  |  last reply 6 years ago


Portable Guitar Amp Hiss

Hi all, I have built this design with a few modifications to accommodate for the parts that I already have. I used a stereo 1/4 inch stereo jack, but I connected the 2nd signal to the battery negative and the ground to the circuit ground. This way the circuit switches on when I plug in a guitar. I also used headphones only instead of a speaker, so I don't need a switch. Now the circuit works and it is amplifying the sound, except there is a very load hiss. I am assuming that a certain frequency in not being filtered out but this may not matter when using a medium quality speaker because of its low frequency range. However high quality earphones can play this sound. Is this correct? Does the headphone work for anyone with the hiss? Thanks in advance

Topic by geniass 8 years ago


battery isolation for portable power. Answered

Iv been trying to wrap my head around what im trying to do and cant quite figure it out. Pretty much i have salvaged 8 18650 size cells that i would like to run in parallel to make a portable battery. In order to boost capacity, i would like to buy new cells and make another pack that is parallel also. I want them parallel so its a nominal 3.7v system that i can boost to 5v for USB devices I know its bad to run old and new batteries in parallel do to various reasons such as self discharge. My idea is have 2 usb ports for one pack and 2 ports for the other pack and have an input/output protection PCB per pack. Now to keep this more portable i only want to use 1 charger and this is what confuses me. I can charge each pack separately, but that would require me to swap packs on the charger, and i would rather not have to worry about doing that. Long story short, how can i charge 2 battery packs at the same time but keep them isolated from each other? Diodes maybe? Also with how the protection circuits work having the charge leads connected to the output leads and the batteries on there own leads, when the charger is outputting over one amps, will it hurt any device plugged into it or will it regulate the current down to one amp with no harm done? Link to usb charger and protection circuit. http://www.ebay.com/itm/221424010115?_trksid=p2060353.m1438.l2649&ssPageName;=STRK%3AMEBIDX%3AIT http://www.ebay.com/itm/400679842464?_trksid=p2060353.m1438.l2649&ssPageName;=STRK%3AMEBIDX%3AIT

Question by Ksp3cialK 4 years ago  |  last reply 4 years ago


Nintedo Needed for a Portable NES

I've been working on a portable NES. (Yes, Instructable will be made.) I've got two NES boards, one is completely dead, and on the other I messed up the video. (Does not display pictures correctly.) Anyway, I know many people have old unused NES's laying in their closets. Whether it's "broken" (I.E. flashing screen) or not, I'd really appreciate if you'd give one. (Or some. :D ) No, this is not going to be a cruddy looking portable, it's going to have a transparent case, going to be really thin (1-2" thick) and not that big. 5" screen; it's going to be really great. Please donate an NES. :) And do not forget! I will make an Instructable on it! It's going to be great! :D

Topic by 1up 10 years ago  |  last reply 10 years ago