An operating system on an MP4?

Hiya! I'm Michael and I always have crazy ideas. This time I want to enter inside a MP4 player memory and modify it's boring menu into a cool thing where you have a white background and you have a cursor that you can move with arrows. Is that possible to edit its memory that way?

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


How do I put a 4 plex security cam system on motion detection system?

I have a system from supercircuits with a 4 cam color quad processor and a 1280 hr time lapse VCR recording and I would like to hook it up to a motion detector on each cam and replace the VCR with a Presidian PDR 3222 DVD recorder. Also having trouble with DVD Recorder not opening to insert a DVD. It would be a great great help if someone can help me with problem? I am not very tecnacial so any pic or video would be a great help if possible. Thank you for any help in advance.

Question by madrasi 10 years ago


Does the Earth 4 Energy system work? Answered

I keep hearing about several different DIY guides and everything I hear leads to Earth 4 Energy System as being the best all around. Does anyone know

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


Speaker system on Mc!

Hello i have create an music system on my mc. It's build up with 4, 6x9 3 way speakers and a car amplifier (250w) and all that is connected to a ordinary carstereo. I got an 12 volt battery with maybe 50-70 amphere hours to get enought power to the system. Now to the question i want to connect some leds to my system to light to the music i playing! But i need some help to know how to do it. I can load up pictures and movies on my project later but for now on i need the help, so please write in comment how to connect! 

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


Ibles Rating

Is the rating thing different now cause a few of my ibles are 5*? i haven't been on for a few months but what happened to 4* being a honor ible?

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


Right mouse menu acting weird? (windows 8)? Answered

Hi there, Today, I've been experiencing a weird 'bug' on my laptop. Whenever I want to use the menu that comes up when pressing the right mouse button in an explorer-related location (documents, music, windows media player etc.), the menu is empty, The menu starts out as completely blank, and the options normally shown appear don't appear until you hover over them with the mouse. When I click the right mouse button in, for example, firefox, it works normally. Does somebody know what causes this, and how I can fix it? Thanks in advance. System information: Lenovo G500-20245 laptop Windows 8 64 bits Intel Core i5-3230M processor. GeForce 720M

Question by dr. richtofen 5 years ago  |  last reply 5 years ago


Is there ANY way to install the Hombrew Channel on Wii System-menu ver. 4.0U???? Answered

If thats not possible, is there a way to "backtrack" to an earlier version??? (if it helps: I've had this Wii since Menu Version 3.0)

Question by B.F.L.M 10 years ago  |  last reply 9 years ago


Energy with Seesaw system

In this sketch you will find that I have attached 10 shake flashlights on  the both side of a balanced seesaw system and this seesaw is moving with a 6 volt motor but  I have used 10 no. shake flashlights and each flashlight will produce only 2 volt as a output which will be less than input . On the first hand each flashlight is producing only 2 volt and on the second hand the total 10 no. flashlights systems are producing 20 volt . If we try this concept than input is more than output but if we add total output then it is greater than input. please answer me that will these flashlights will be light up or not as mass is not an issue in this device. Note(1)each flashlight is separate with another flashlight . (2)to move a balanced seesaw there is need of less energy or input. These flashlights are mounted permanently ,horizontally on the both Arms of a seesaw(making+ symbol and view my sketches) and this seesaw will move side to side just 2 to 4 centimeter only.remember we will only shake the only one arm of this seesaw with corner and flashlights will not slide as these are mounted permanently on the arm of this seesaw. suppose if a flashlight require 10 watt power to glow up then we will have to apply 20 watt so that so that this 20 watt input could also counter some mechanical loss also.but this 20 watt input will be sufficient to glow up these 10 flashlights as all flashlight are permanently attached on this seesaw so each will shake with equal force or applying force will be equally distributed in these flashlights..in other words we are giving 20 watt input and out put is 150 watt with these 10 no. flashlight.we can do it with our hand power to test it to shaking the seesaw.

Topic by vikram_gupta11 2 years ago  |  last reply 2 years ago


How to use IR remote with Arduino LCD menu?

Does anyone know how to edit an Arduino LCD menu sketch to work with an IR remote control instead of using 4 physical buttons? I'm using this menu http://www.coagula.org/content/pages/tutorial-manage-menu-and-lcd-display-arduino but I have troubles in editing the code to use the IR remote control...I'm pretty n00b at programming so I need your help guys... Cheers!

Question by Timofte Andrei 6 years ago  |  last reply 1 year ago


The Instructables Rating System

As you have all noticed, Instructables has recently implemented a new rating system, based on stars (insert 2001 A Space Odyssey joke here). We've done a bit of experimenting -- and reserve the right to do more in future -- but it's stable for now so here's how it works. UPDATE 2010-09-24: The below calculation has been tweaked to bring Instructables' ratings closer to the level of ratings of comparable content on the Internet generally.  We found that we run about a star low, based on a rough look at a bunch of other sites and our (totally unbiased of course!) estimates of their content quality.  So, we have added a star to all ratings across the board.  It's like grade inflation... but we know our users put up really good stuff and we want that to be recognized. UPDATE: we've tweaked the system a bit more. The below describes the rating system as of 2008-11-15. The rating system uses a weighted average, where Instructables with only a few ratings, or ratings by users who have not rated many Instructables, have a total closer to the middle of the star range than the actual average of the ratings. For example, an Instructable with one five-star rating will have a total closer to 4 than to 5, because there are so few ratings on it. If the user who rated it hasn't rated other Instructables, the total will be lower than if the user who rated it has done a lot of rating in the past. The purpose of this difference is to minimize the effect of 'shill' ratings; we've seen some members attempt to bump their ratings by creating fake accounts just to rate up an Instructable or two! As more people rate each Instructable, the total becomes closer and closer to the true average of the ratings. And as each user rates more and more Instructables, we weight their rating higher and higher. We have done it this way because we want the rating to reflect the opinion of the whole community, and we believe that members who do a lot of rating have been around enough to have a good sense of what makes a good Instructable. Also, members who comment and rate have their rating counted higher, as the comment indicates a higher level of involvement with the Instructable than rating alone. This method makes it so a less-than-stellar Instructable can't be pushed to the very top of the ratings because the author got their friends to sign up and rate it at 5 stars; similarly a really good Instructable can't be dragged too far down by a malicious user. For the mathy amongst you, this is the formula (we changed the way one component is calculated): (siteAvgNumRates * siteAvgRating) + (numRates(ible) * avgRating(ible)) R(ible) = ---------------------------------------------------------------------- siteAvgNumRates + numRates(ible) The avgRating(ible) is no longer a straight average, but a weighted one. It's calculated like this: (W1*R1 + W2*R2 + ... + Wx*Rx) + 2(V1*C1 +V2* C2 + ... + Vy*Cy) -------------------------------------------------------------- (W1 + W2 + ... + Wx) + 2(V1 + V2 + ... + Vy) Pretty complicated algebra, huh? W and V are both weight values, between 0 and 1. R is the rating of someone who has not commented, and C is the rating of someone who has commented. siteAvgNumRates and siteAvgRating are estimates, held constant in the pursuit of not having ALL ratings change every time one person rates one Instructable. As you can see, when the number of ratings for a particular Instructable is low, the weight of the site averages count for much more of the rating value. When the rating count is high, the site averages are only a small part of the total rating value. We believe this algorithm has a good balance between letting the cream rise to the top, and preventing 'rating spam' to coin a term. Please comment!

Topic by rachel 10 years ago  |  last reply 8 years ago


Wii - Play Backup Games without modchip -- System Menu V 4.0 ?

Please note: I am beginner at this. Ok, here is what I have done: 1. I have upgraded my System Menu to version 4.0 using the update option from the Wii2. Following this instructable: https://www.instructables.com/id/S9RV0FWFN4H8OED/ I have installed cIOS36 Rev7. This means that I have also installed Homebrew Channel (using Bannerbomb exploit ). 3. Following the same instructable I have got to the point where I got the Error ret-2011 which a lot of other people (with System Menu 4.0) got: " tried to install the 04-BackupLauncher0.3g+_249-NeoRame.rar like instructed below.I get a installing ticket...ERROR! (ret = -2011)"4. After that everything went down the drain. I have tried to follow this instructable: https://www.instructables.com/id/SQHX9S3FUNOXOKE/ with both versions (offline and online), but I kept getting the -2011 error. 5. I have tried to follow other tutorials out there but I did not get any further because of different errors. Now I do not know what version of cIOS or other files I have installed on my Wii.I have tried to update again my System Menu 4.0 in case I have messed up anything but my Wii says that I already have the latest version installed. So my questions are: 1. How do I know what version of the Files I have and whether I have messed up my System Menu ? And how do I get back to the original System Menu 4.0 of the files? 2. Since the aim of this entire thing is to play backup games, how do I fix this and how do I get my Wii to play the backup games, from backup DVDs (I've seen that it might be possible to play them from USB devices, I am not interested in that right now). Also, I do not want to install any other homebrew applications (like DVD players or video players).3. If in the process I have to downgrade my System Menu, what are the exact steps to do that? Thank you very much for your help and I hope someone will be able to help me make things work !If you think you can help but you need more information, please comment on my question and I will provide as much information as I can

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


help!! can someone give a wire diagram for 4 led's for a plastic model aircraft?

I have a working plan to install 4 small leds(2 green,a red,and a white) in a 1/48 scale A-10 plastic model aircraft.I would like to have the red,1 green,and the white to all flash at the same time, with the other green to remain steady (for cockpit lighting).I just dont know how to wire it.I generally know what parts,and what voltage for the led's I need to get, I just need a wiring diagram.(this wire goes here,this wire goes there,etc.).I plan to install the red,green and white led's in the fuselage with either a small diameter clear plastic rod or fiber optic tube running to the wing tips and tail, with the other green installed under the cockpit floor. Can anyone help?? thank you.

Question by venom sixx 10 years ago  |  last reply 10 years ago


Help with code on 4 x 4 x4 LED cube with Arduino?

Recently i made a LED cube, on my own, and  i want it to display characters, alphabets numbers going layer by layer using the concept of multiplexing and POV (persistence of vision) , i googled a lot, searched on instructables too!! but was unable to find an easy code to do what i want, i am only a begginer and don't have very much knowledge . Please provide a way i can go for. By the way this is what i did a day ago:- http://www.youtube.com/watch?v=5gODIqwUPEk

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


does anyone know how to make an adapter or buy one for coxial and composite cables. plz read description 4 more info Answered

 i need to plug two yellow composite cables into an adapter that i can also plug an australian coxial cable into as well. plz help!

Question by lol101lol 9 years ago  |  last reply 9 years ago


Fire Fox 4 browser issues

I recently switched to FF4, and notice that there are a couple of issues independent of recent updates. For instance, I can no longer see the rating stars on projects or forum topics, and RickHarris has reported missing buttons in the Guide system. If you have changed to FF4, is anything missing or dysfunctional for you? If so, please leave a comment here, and I will pass them on to HQ iat the end of the week.

Topic by Kiteman 8 years ago  |  last reply 7 years ago


The real instructables rating system

The new instructables rating system is messed up, theres the rating that they want you to think, and theres the rating you actually get when you give a crap instructable on how to open a can of sprite a .5 rating .5 - 2.68 1 - 2.73 1.5 - 2.77 2 - 2.86 3 - 2.91 3.5 - 2.95 4 - 3.00 4.5 - 3.05 5 - 3.09 anything rated +1 in the previous rating system is a 5, which really means a 3.09, i think its that way... this only applies to 1st ratings

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


No battery solar motor system?

Hi all!I am competing in this solar boat race and one of their rules was that for a sprint race and a slalom race, the batteries have to be disconnected. We have 4 panels, each rated at 64W(18V), a victron MPPT 75v/15amp charger (bluetooth activated), 240W DC motor (up to 48V), 3000W PWM motor controller.My question is, how should I configure this electrical system with solar power only? Batteries have to be disconnected and not operable.Things that I've tried:I put 4 panels in series (72V) and connected them to the MPPT charger. Then the load I connected them to the PWM motor controller. This was not ideal since the motor barely got any power(very slow), and the panels would over volt up to 76V which was past the 75V as advertised and system goes into overvoltage protection.I also thought of connecting the leads of the solar panels in 36V config (2 parallel, 2 series) directly onto the PWM motor controller but decided that it was safer to ask y'all for some help first. I am open to buy a new MPPT controller that goes over 75V and return the old one, only if that is the best thing to do.controller link: https://www.amazon.com/Victron-Smart...ords=mppt&...Solar panels (MSX64) link: https://www.solarelectricsupply.com/...arex-MSX64...Thanks in advance! :)

Question by ericdong886 1 year ago  |  last reply 1 year ago


Rapid Arrow Firing System

It was only a very simple idea, just make a massive arrow holder and slide a rod through it.It shoots 13 arrows, with about the power of the v2.Problem was though...the massive amount of rubberbands made it bend all over the place; 13 times strings of 4... =52 which just doesn't work.It did shoot, but as you can see from the pictures...it was not very sturdy lolThat rod with the wheels on it equals a black rod O.oAnd before you ask....everything except the trigger is taken apart already, as I consider it failed.And ofcourse I don't sit still, building something new already =dMight make one again, but on a smaller scale.

Topic by Wicky 10 years ago  |  last reply 9 years ago


Building a car sound system?

I recently got my car and want to boost the sound system by upgrading some speakers and putting an amplifier, i have 2X 30W 4OHMS 1X 350W MAX, 80W nom.  4OHMS My car has a pioneer mp3/cd player  with 4 channels(4x 45W rms) I want to bridge an amplifier to connect the 350W speaker for the rear only and use 2 channels for  the 2 front speakers. my idea is using two channels of the car player for the front. i will have 2 channels free [(left and right)rear] i would connect it to the amplifier, then bridge the amp to connect the speaker. can anyone suggest me a cheap amp to buy and tell me if my idea is correct???

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


Lawn Mower Blinker System

This past summer i recieved an older riding lawn tractor, without the mower deck. I tuned up the engine, replaced old worn parts, painted it up, mounted a trailer hitch, and built a snow plow for it. After realizing that i could have even more fun with it, i changed out the drive system and made it go about 25mph top speed. With the power that i aquired, i want to put a blinker/ hazard signal system for it. Just for fun. Using 6 12v bulbs (4 for signaling front/rear left/right, and 2 optional rear running lights), and a 12v tractor battery, i need to incorporate these to blink at either a fixed rate or variable rate, using some kind of apropriate op amp. If you have any ideas, or can whip up a schematic, i would greatly appreciate it.

Topic by flyhunter3825 12 years ago  |  last reply 12 years ago


Home automation system configuration?

I have recently purchased a used home automation system off of eBay. The whole package included the following items. 1. Amber Wireless AMB8425-M USB Stick 2. Aeon Z-Stick S2 USB Stick 3. Huawei E173u-2 Boradband USB stick 4. 3 x Zwave Socket adapters 5. 7links NAS Print/ USB Server Photos of these modules can be seen below. The seller was not aware how all these modules can be put together into a home automation system. I googled for sometime and figured out that I can setup an indoor automation solution using only the Aeon-Zwave USB and the Z-Wave socket adapters, and control them using my android phone. Can someone please help me how can i use the remaining modules and setup the automation for remote access as well ? Many thanks

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


Amplifier for my car audio system?

I have 4 x 30W speakers as well a 400W subwoofer....I am simply lookin for an appropriate AMP to push everything....something under $300, PLEASE AND THANK YOU!

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


Best way to overclock a Pentium 4 531? Answered

Well, to do this, I obviously have to give a few stats of my system. CPU: Intel Pentium 4 531 (Prescott chip) running @ 3 GHz RAM: 2048 MB of DDR (PC3200) Motherboard: Biostar P4M800 My goal: The 531 @ 3.1 / 3.2 GHz

Question by Madrias357 9 years ago  |  last reply 9 years ago


bluetooth 4 transmitter to headphone latency reduction

Hey everyone! i'm seeking some advice about a system i've been trying to work out - a bluetooth audio headset from a PA system for vocal monitoring during band rehearsals. currently i'm running microphone -> PA -> bluetooth 4.0 AD2P compatible audio transmitter -> powerbeats bluetooth 4.2 headphones the connection is working fine, the only issue is latency between microphone and headphones (approximately half a second), which makes it very difficult to use as a monitor as i require very minimal latency to hear my voice in synchronisation with the rest of the band. a few questions; does bluetooth simply have an unavoidable lag due to data compression? is it possible for me to hack the bluetooth transmitter in some way to increase the rate of compression/transmission? what would you recommend as a cheap substitute in the event that nothing can be done? thanks very in much in advance, Austin

Topic by totemgoat 3 years ago


Quiz Buzzer Lockout System help needed

Hi all. my church has task us youth to design a quiz buzzer lockout system type of thing to be used for a bible quiz. so the host will ask a question and 8 people will try to be fist to press their button... the fastest button will lockout out all 7 other buttons so they wont buzz... after he answered then the host will press a reset switch and continue with the next question... i did a ton of research and always end up with arduino arduino arduino... and the instructions is all for 4 or so people and its not very clear to understand or easy to do. i know a bit of programming so that wont be a challenge. i love electronics so that wont be a problem. i just need a clear set of instructions to follow and some guidelines and parts to buy... (im 14 years old... )  the quiz is end of march. it for 8 people cause 8 youths of 8 different churches will compete.  if anyone could give me a plan or guide or point me in the right direction that would be super !!! i know im gonna need some wire... allot of wire... and an arduino... thanks in advance to all you wise folk :) oh btw i live in cape town...

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


How can i have my home alarm system email me system status?

I have a concord 4 home alarm system from GE. It currently supports the following communication methods to report status. 1. GSM by means of a $250 module to connect to alarm.com 2. Outbound dialing to a pager # which will send codes which you need to look up to see what they mean. 3. Central monitoring station service which it will dial and send system status to. I've seen modules such as the Telguard TG-1 which will intercept the outbound dialing and convert the pager tones and transmit them over GSM to a central station as well. What i'd like to do is one of the following. I'd like to get the system status messages from my system, but I don't want to purchase the GSM feature or a pager as I already have a cell phone. I can add the enterprise paging feature from at&t; but I just feel there must be a DIY method for this. One option I've been considering is a phone line simulator component to basically have it connect to a server I have via a fake modem connection and use the GE Enterprise Downloader software to have the system upload/download from that using the phone line simulator. Beyond that, i'm not sure what options I have.. Would love some ideas.

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


Help with a game system mod?

I'm buying a sega game gear to mod. I want to add an a/v input without using the tv tuner accessory. Is this possible? I cant find it anywhere online, but i did find a pinout and it seems possible. I know i could connect the audio to pins 44 and 45. Would it work if i connected the video in to pin 43? Any help would be appreciated. Thanks in advance. 1 +34(V) liquid drive                                        24 MREQ memory request 2 +5(V) +5(V)                                                    25 A10/TPR2 address 3 /WR write signal                                           26 /RD read signal 4 A12 address                                                 27 /EXM 2 0~7FFFH 5 A7/CL1B3 address                                      28 A15 address 6 A6/CL1A2 address                                      29 A11 address 7 A5/CL1B2 address                                      30 A9/TPR1 address 8 A4/CL1A1 address                                      31 A8/CLIA3 address 9 A3/CL1B1 address                                      32 A13 address 10 A2/DW address                                          33 A14 address 11 A1/DO3 address                                        34 /EXM1 8000~BFFFH 12 A0/DO1 address                                        35 +5v +5 volts 13 D0/DB data                                                 36 /M1 M1 cycle 14 D1/P3 data                                                  37 IORQ I/O request 15 D2/P2 data                                                  38 /RFSH refresh 16 GND D ground                                           39 /RESET Reset 17 GND A ground                                            40 CCLK Clock 18 GND D ground                                           41 GND Ground 19 D3/P4 data                                                  42 /GG MS/GG 20 D4/P1 data                                                  43 /TV TV Cart 21 D5/CL2 data                                               44 TVSNDR VR Right Audio 22 D6/DO2 data                                              45 TVSNDL TV Left Audio 23 D7/DO4 data

Question by musick_08 7 years ago  |  last reply 7 years ago


Mini/Micro Game System

Hi guys, I've been thinking. Really thinking. I recently found my Digispark (if you dont know what those are, google digistump, click on the first link and go to products, Digispark. They're really cool.) and decided to put it to use. I have always wanted to have/build something like a micro gaming system (sort of like the ben nanonote (if you don't what that is, google it, its really cool)) and decided that as a challenge, I could try implementing the Digispark as the Processor. I know that I wouldn't be able to run any games more advanced than pong, breakout or snake, but even those kinds of games would be enough to keep me interested while in boring situations. My basic thinking is this: There would a small lithium-ion rechargeable battery on the bottom to be a base (but still removable), the Digispark without any headers above the batteries, and a small LCD screen (1.8, 2 or 1.3 inch screen size) that would have either two pushbuttons (one on either side of the screen) or four pushbuttons configured in a D-pad style on the right side of the screen (how many buttons it would have depends on how many pins the Digispark would have open (if any), which also leads to my question, does anybody know any place to get video LCD screens (don't care if its color or not) that only take up 4 or less pins? I know that probably seems absurd, but if anybody knows any places to get them, please let me know. And just one last thing, is it possible to program games in the arduino IDE? Are there libraries for them? ANd if you can program games, just how advanced can you go?

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



what would cause my stereo system in my car to stop working after 4 years?

What would cause my stereo system in my car to stop working after 4 years?

Question by 10 years ago  |  last reply 10 years ago


AR-4 Commando v3: Review

Here is the review for the AR-4 Commando v3 by DJ Radio.What to expect:Innovation: 10/10 Very innovative new rail system, and loading design. Strength: 9/10 He did a very good job of making it strong with the amount of pieces used.Range: 7/10 It is not much better than any other ram rod. But I got an average of about 20 feet.Looks: 8/10 I think it looks ok. It is by far his best looking gun.Parts: 9/10 uses about 1000 pieces. So I would call it low piece. Handle: 7/10 the handle is a little too small for me but it might work for others.Stock: 9/10 very sturdy Barrel: 8/10 Innovative. and it has a low friction barrel. Fake barrel: 7/10 bullets get stuck occasionally. Magazine: 7/10 new and innovative but jams occasionally Extras. Bipod:8/10 not the best but it holds up the gun.scope:8/10 It works good.At the end: I would give the gun 8/10.Here is the link to the gun. https://www.instructables.com/id/AR-4-Commando-v3/Thanks for reading.

Topic by Killer~SafeCracker 9 years ago  |  last reply 9 years ago


4 way spekaers. is the xover schematic correct?

My supplies A Tweeter with a frequency response of 20 KHz ~ 40 KHz, 8Ohms, 75Watts RMS/3000Watts Max, and Sensitivity of 105dB. A 4” Subwoofer with frequency response of 25Hz ~ 160Hz, 4Ohms and 25 Watts RMS Two 4” Full Range Speakers of 4Ohms and 5 Watt RMS Is the schematic mentioned in the pic is a suitable xover for my system please clear the nearest values to me

Question by subhamsingh236 5 years ago  |  last reply 5 years ago


Knex Survey

Just wanting some of you to take a survey... this will help me and alot of other people Remember to only pick one answer! Question 1: Which kind of gun do you like best? A: Ram gun B: Slingshot C: Gatling D: Other/Special Question 2: What trigger mechinsim do you like best? A: True Trigger B: True-Block C: Sear System Question 3: What is your favorite size of gun? A: Pistol B: Assault C: Sniper Question 4: What thickness do you like best? A: 3-4 layers B: 5-6 layers C: 7+ layers Question 5: Out of all these factors, which one of them do you think matters the most? A: Power B: Comfort C: Looks D: Other Question 6: In a knex war, which feature is the most valued? (you can pick more than one) A: Removable mags B: Rapid fire C: Revolvers D: Long range Thank you for participating in this survey! -DGM EDIT: Survey is closing january 30, Results will be up by Febuary 7

Topic by Der Bradly 10 years ago  |  last reply 7 years ago


what do I need for home surround sound? Answered

I have this Cyber Acoustics set of speakers that I would like to set up as a home audio system, but I don't know what I need or how to set it up.  I have the main woofer, and 4 other speakers (front right and left, back right and left).  The input is your standard head phone jack.  What do I need to get to make this work for the dvd player (or other tv things)?  Or what do I need to do to set the system up?  Thanks in advance.

Question by salomon1996 7 years ago  |  last reply 7 years ago


4 way spekaers - is the xover schematic correct?

My supplies A Tweeter with a frequency response of 20 KHz ~ 40 KHz, 8Ohms, 75Watts RMS/3000Watts Max, and Sensitivity of 105dB. A 4” Subwoofer with frequency response of 25Hz ~ 160Hz, 4Ohms and 25 Watts RMS Two 4” Full Range Speakers of 4Ohms and 5 Watt RMS Is the schematic mentioned in the pic is a suitable xover for my system please clear the nearest values to me Thanks in Advance

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


My Nintendo Wii has the black screen of death please help

As the title suggests my wii (4.3e) has a black screen of death after i installed priiloader and enabled a few hacks in the system menu nothing now works and any help would REALLY be appreciated.

Question by dan1897 6 years ago  |  last reply 6 years ago


Just how fast can a 2.6GHz Pentium 4 go?

Well I have gotten a 2.6GHz Pentium 4, on the socket 478 with stock cooling, to go as high as 2.94GHz before the system starts to hang. I believe I have the Core voltage set to 1.875v, and I am running windows XP home edition. the system specs (other than the cpu) are: -Ram-1gb in four slots -HDD's-Fujitsu 10gb and Maxtor 10gb -Mainboard-Asus P4GBX -Video-Nvidia Geforce (2?) pci card -Cooling-Stock pentium 4 cooling aparatus and 2 case fans -PSU-350W Enermax The cpu is just a standard socket 478 pentium 4 that has a stock speed of 2.667GHz Has anyone gotten theirs to go any faster?

Topic by zack247 8 years ago  |  last reply 8 years ago


Vacuum Pump Limit Switch System

Hey Everyone... I'm Alive! I've just been really busy with my senior design project :DSo today I acquired ToolUsingAnimal's vacuum pump on loan. I'm going to be doing some vacuum bagging.... To prevent his pump from blowing out, I need to make a limit switch so the pump shuts down when it reaches full vacuum and then turns back on if some of the vacuum bleeds of somewhere.So the method I cooked up today was to use a syringe with a weight. The weight will pull the syringe open and close a micro switch that turns the compressor on. If there's vacuum, the plunger will be fully retracted and the switch will be open (off position). This method will cost me all of $5 or so (10 cents for the syringe and $4 for the switch).I was just doing some math on how much weight I'll need for different syringe sizes - and it's totally plausible (we're talking less than a pound to 3 pounds depending on syringe diameter).Question - any other suggestions or blatantly obvious/easy/cheap solutions? I know this sounds Rube Golbergian, but it's not nearly as complicated as it sounds (or looks) :D Emphasis on cheap, I just put in an order for roughly $2000 of materials and supplies!

Topic by trebuchet03 11 years ago  |  last reply 11 years ago


blue screen of death on my laptop

Ok i installed updates and when i restarted and logged on, my start bar showed up as the old windows 98 bar, and then my computer blue screened with this message stop: c00002la {fatal system error} the windows logon process system process terminated unexpectedly with a status of 0xc0000005 {0x00000000 0x00000000} the system has been shut down so i cannot do anything but go to the setup menu to look at the system, i cannot log on to windows without bluescreening everytime

Topic by ClemensY290 10 years ago  |  last reply 10 years ago


Is this a simple RC buddy box system ?? Answered

Hi Guys, I have recently resurrected my interest in Radio Control Aircraft. When I was teaching I ran an after school club to build and fly RC aeroplanes - However it is very hard for youngsters to pick up the skills without excessive crashes. There is a system to over come this - The buddy box system available on many of the high end RC transmitters. 2 compatible transmitters are linked with a cord one is the master and one the slave. The operation of the master slave is by a switch on the master system. Now all of these radios are relatively expensive - £100s. where you can buy relatively cheap equipment without this facility for £30 or less. As far as I can tell the signal on the buddy box cord is a PWM signal which is passed serially from the slave into the master processor to proved the stick position information from the slave. My question is will the much simpler cct below work or have I missed something in my though process. I propose to cut the 5 volt line to the sticks in the master and insert a DPST switch This switches the 5 volts to the slave system which is un-powered. With 6 lines - 4 signal 1 +5 volts and 1 ground line I can provide the necessary position signals to drive the master transmitter. If necessary I can fit a DPDT switch and cut the ground line as well. Flicking the switch back will give control back to the master by switching the +5 volts. If this looks OK I will get another transmitter and do the modification - Have I missed something obvious here.

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


how can i make a color change menu in a batch file?

This is what i have madet but i cant se why it wont change color echo off goto 1 :greens color 0A goto 1 :1 @echo.1) Crasher @echo.2) just for fun @echo.3) shutdown @echo.4) spiral color 0A @echo.5) matrix(g) @echo.6) matrix(r) @echo.7) matrix(b) @echo.8) change color @echo.9) not done @echo.10) not done @echo.11) not done @echo.12) not done set pass= choice /c 123456789 /n /m "Choose a task" set pass=%errorlevel% if errorlevel 1 set goto=crash if errorlevel 2 set goto=fun if errorlevel 3 set goto=3 if errorlevel 4 set goto=spiral if errorlevel 5 set goto=matrix(g) if errorlevel 6 set goto=matrix(r) if errorlevel 7 set goto=matrix(b) if errorlevel 8 set goto=color if errorlevel 9 set goto=done if errorlevel 10 set goto=done if errorlevel 11 set goto=done if errorlevel 12 set goto=done goto %goto% :crash start Crashthecomputer.bat goto done :fun start fun.bat goto done :3 shutdown -f goto done :spiral start spiral.bat goto done :matrix(g) start matrixg.bat goto done :matrix(r) start matrixr.bat goto done :matrix(b) start matrixb.bat goto done :color cls @echo.1) green @echo.2) red @echo.3) blue @echo.4) gule @echo.5) cyen @echo.6) purpel set passs= choice /c 1234567 /n /m "Choose a task" set passs=%color% if color 1 set goto=greens :done @echo thanks for using my creation pause

Question by Emil ØmarkJ 3 years ago


Excercise car?

What I am designing (and planning on working on very soon) is a vehicle with the possible speed of a gokart, but with a propulsion system similar to a bike. The mechanism itself would be a simple push pedal (like a car) but with a gear system like a bicycle. Upon pushing down the pedal, a shaft connected too it would then push against the foremost gear. and that gear would push another and so on until it comes in contact with the rear wheel, propelling it forward. A simple spring between the pedal and floor will allow the pedal to return to the original position. However I cannot seem to get the steering and brake system down right. Should the steering be that of a car and use 2 wheels on the front with a long axel connecting the 2? or more like a bike, with a one wheel turning system. (aka. should it be a 4 wheel or 3 wheel? Might depend on weight distribution and balance, though both could be possible.) and how should the brakes be arranged? a pedal, like a normal car brake, or a stick beside the driver, like an emergency break, as well as where the brake pad would come into contact with the rear. On the axel or on the wheels? Last (and most definitely not the least) is that while this vehicle must be sturdy, it must also be light weight. So any and all material recommendations for parts would be greatly appreciated. (cheap would also be appreciated) (My thought for material) chasis - light, but firm (strong) wood. axels - aluminum or steel tires - Gokart/ riding lawn mower turning wheel/steering - wood or plastic seat - whatever I can find that's soft (not a major thing) safty belt - I may not be able to test out the prototype (kinda thick) so I need the crash test dum *ahem* "driver" to survive incase a crash were to happen. brake pad - rubber so that it causes the right amount of friction but not enough to damage any parts.

Topic by curvy77 5 years ago  |  last reply 5 years ago


Need ible 4 alert system for when mail arrives. I live in top floor flat.Its hard to predict when mail arrives.

I live in a top floor flat. We receive alot of packages from ebay. Its difficult to tell when the postman has been..Have had problems with mail going missing in the past. Could do with some sort of alert system that triggers when the mail comes through the post box. Trigger string bell mechanism.

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


linux on polaroid pmp350-4 mp3 player?

I am trying to re-flash and put linux on this mp3 player. The ultimate goal is full sound and photo/video support with touch screen interface, using an alternate OS other than the one provided by polaroid. I would like to use this to read text documents as well. ---- --- I was going through some of the old gadgets in my house and found that I still had an old polaroid pmp350 mp3 player. It has a touch screen and I thought to myself "hmm... google android..." or "rockbox..." This is a cheap peace of hardware, and even though google android is out of the question, I was wondering about flashing it with custom firmware to allow it to run some other operating system. It has a touch screen which would make it quite fun to play around with if only there was a way to expand its current capabilities. So I thought I would put up this thread to see if somebody more clever than I could figure out how to re-flash this thing and install linux, OR if somebody could point me in the direction of materials that might be used to do such a thing. The main issue is going to be getting an OS to run on this unsupported hardware. I am going to be doing research in the meantime to find out how to get linux on this device, because I think it would be a really cool hack to show off to friends. *Update* Have written polaroid for info regarding technical specifications, also asked if they might be able to provide a rom flashing tool* If anybody wants to give this a shot, let me know how it turns out. Peace and love.

Question by djbuggybee 7 years ago  |  last reply 3 years ago


Automatic Irrigation using d1 mini

Hi Everyone, I reviewed different automatic irrigation system projects here in instructables and other sites as well and i decided to gather parts to do a simple small project myself. One thing that comes hard is the programming part as I don't know any programming language. I'm looking for some help with code merging, explanation and some general guidance. Could you please let me know, point me to right direction and tell me what you think and if requirements are actually achievable? What I would like to achieve: Intention of this project is to have manual and auto irrigation system which will: 1. Measure soil moisture and dependently on the value activate the usb pump which will water the plant (preferably analog output that will show the measurements in %) 2. Manual activating the pump via hardware button and via mobile phone with internet connection 3. Distance sensor which should measure how much water is left in the tank 4. Email notification with info when to water the plants and soil sensor data regardless of the automatic process that has already started 5. Email notification with info about the water in the tank when it’s near empty 6. Dashboard preferably inside the network (not using third party like blynk or others) with access from the internet (I have QNAP that I think can be used). 7. If possible – have amazon echo (Alexa) read the sensor data to tell me the values and comment if the plant should or shouldn’t be watered or the tank should be refiled or not as well as ability to ask Alexa to start or stop the irrigation Hardware: D1 mini: https://wiki.wemos.cc/products:d1:d1_mini Wemos V2 Relay shield: http://hobbycomponents.com/shields/865-wemos-v2-relay-shield My relay is slightly modified: 2 small wires soldered to the vcc and ground so that when it receives the signal on d1 pin it opens and current flows to female usb connector supposedly activating the usb water pump. All this can be stacked together even with soldered wires YL-69 sensor: http://www.oddwires.com/yl-69-soil-hygrometer-humidity-soil-moisture-detection-sensor/ Ultrasonic Distance Sensor (HC-SR04): https://thepihut.com/products/ultrasonic-distance-sensor-hcsr04 USB mini water pump: www.goo.gl/yUABDd Button x4 if needed: Board x4 if needed: sample codes used in other projects: https://randomnerdtutorials.com/guide-for-soil-moisture-sensor-yl-69-or-hl-69-with-the-arduino/ https://create.arduino.cc/projecthub/nekhbet/using-the-yl-39-yl-69-soil-humidity-sensor-with-arduino-968268 https://community.blynk.cc/t/irrigation-relay-with-timer-esp8266-wip/700 Alexa enabled homemade cat feeder example: https://www.hackster.io/darian-johnson/alexa-powered-automated-cat-feeder-9416d4 Thank you very much in advance for your help and support.

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


Digital noise in battery powered system Answered

Hello, while building a Bluetooth speaker based on this instructable, I ran into some problems regarding noise. There already exists a question regarding this problem here, but it is a few years old, and it gave me no solution. The power source for this project is a self constructed battery pack consisting of 4 18650 battery's soldered to a battery protection circuit (just like in the instructable). The PAM8610 (black version) amplifier board, however, can't take 16.8 volts so a voltage regulator is placed in between set to 12 volts. Same story for the Bluetooth receiver board (KRC-86B V4.0), but with a voltage of 5 volts. All fine and dandy till there. The KRC-86B has an input for a 3.5mm jack connection and an output. The output is a pass-trough of the 3.5mm input unless a Bluetooth connection is present, then the Bluetooth signal will overwrite. Here's the problem: whilst the connection using the 3.5mm jack works fine, creating a Bluetooth connection results in a very annoying digital noise. This noise is there instantaneously and is the same on all volumes of the host/transmitter. If no music is being played by the host for around 15-20 seconds the device seems to enter a power saving mode and the noise changes to a regular beep. This is way less bad, but of no use because it is replaced again by the bad noise when the music starts again. I have tried a diversity of things, listed here with their effects: Action: wrap the Bluetooth receiver in electrical tape and aluminium foil. Result: nothing much, it didn't even block the music. Signal was only blocked by three layers, a few meters distance and my body in between my phone and the receiver. Action: lift ground in signal between Bluetooth receiver and amplifier. Result: noise gets slightly worse, no change in tone, only amplitude. Action: moved away from my computer, as to avoid interference. Result: nothing at all. Action: tried another Bluetooth transmitter, PC instead of phone. Result: - Action: broke the previous board at the start of this project by heating it too much in the attempt to change a wire. Result: noise was also present at the first board which I did test by hooking it up to the line-in of my computer. Though that could also have been by the ghetto set up I used. The 3.5mm cable was poorly connected, trough a breadboard. Taking my multimeter and measuring the difference between negative of the battery and GND of the voltage regulator for the amp gave a 6.0 mV reading. The same result is achieved when measuring between battery and GND of the regulator for the KRC-86B. The potential between GND of the signal and the GND of one of the regulators was 0.1 mV. I understand that you might want to hear the noise, so I recorded it: link. It is very soft, but audacity doesn't read .m4a files, and turning up the volume works just as well. Please let me know if you have any idea's on what could solve it and/or if you need more info. Thanks in advance.

Question by arduinefier 3 years ago  |  last reply 6 months ago


MS powerpoint Game and picture sampler

This is a simple maze game with a fully dynamic menu and level selection. Also included are two prototype picture selection and viewing suites. Practice for game menus and things. The download is completely free and has no junk with it. Tell me what you think!  -------------UPDATE------------------- I re-made my pic viewer into a sample Operating system that is still in its early stages. all you have to do is press f5 to start.                                                                                           

Topic by vroom...vroom... 5 years ago  |  last reply 3 years ago


How to choose speaker for DIY iPhone speaker system Answered

Hi guys I'm a bit of a tinkerer, but new to audio.  I'm designing an ipod speaker dock from a Gigaware 40-303.  Got the thing apart, but the left speaker is making a bad buzzing sound.  I want to replace the speaker, but I'm unsure of what to look for.  The specs for the system I got the circuit from are as follows: output: 15 W x 2 Driver size: 3.0" x 2 signal to noise: greater than or equal to 65 dB freq response: 80Hz-20KHz rated load impedence: 4 ohms power rating: 100-240V -50/6-hz, 1 amp So I need to look for a 3" 15 watt 4 ohm speaker?  I don't want to underload the circuit and draw too much power.   What about range?  Mid, tweeter etc?  Does that matter? The original speaker is pictured below.  The sticker on the back is the only identifying info.  Thanks for any help you can provide.

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


New AR-4 Commando v2-NOW POSTED

ITS POSTED!!!!!!!!!!!This is my latest knex gun, the AR-4 Commando v2. Now that i have gained more parts, i could fix the problems present in the v1.PROS=(a * means an improvement over the v1)-Jam-free mag-also removable in order to mod (its expandable)*-better handle*-more strength*-has a front grip*-stock is more filled in*-true trigger-comes with shoulder strap (optional)*-uses a dual-rail system-slightly more accurate than the v1*-auto-load*-35-40 foot range-has a sight*CONS-uses more parts than the v1-3/4 of the barrel is fake (yes, i tried to make it more accurate, but the ammo kept getting stuck)-takes longer to reload than v1 (mostly because it holds more)-pretty awkward when you use the front gripso, i will post this saturday (if i am not busy), and i hope you enjoy!

Topic by DJ Radio 10 years ago  |  last reply 10 years ago


Computer not booting when Hard disk is connected?

Hello, I bought a new system with Segate 2 TB internal hard disk about a week ago. I have Windows 7 running on my PC. Till yesterday my system working fine. Today when i tried to start my system, I see the Intel logo and press f2 for bios and F10 for Boot menu. It does not move from there. I am not able to access BIOS Setup. And BIOS is accessible if I remove the hard disk. If i connect hard disk it does not move from the Intel logo. I tried to connect my hard disk (2TB Segate) to another system, it booting and working fine. I even tried other hard disks (500gb & 1TG Segate) in my new system it booting and working fine. But when i try with the 2TB in my new system I see the Intel logo and press f2 for bios and F10 for Boot menu. It does not move from there. I am not able to access BIOS Setup. I did not get any error message. I would like thank everyone for the support in advance ------------------------------------------------------------------------------ Intel I5 3470 Intel DH77EB 2TB Segate 16 GB (8*2) RAM 2GB Graphic Card.

Question by Rohit K 5 years ago  |  last reply 3 years ago