Search for multi zone audio in Topics


Multi-Room Audio System?

I have an idea for a multi-room audio system but am very much stuck with the know how. I have recently found Airfoil which allows you to transmit an audio stream over LAN to other devices, what I would like to do is have audio playing in other rooms through Airfoil Speakers but to do it cheaply, I know that I could just use other PCs and laptops to do it but it is not something I have right now, I do have two very old laptops (circa windows 3.1 & 95) but they lack in .... functionallity. I was thinking of some stripped down computer which could be hooked up to existing amps. What exactly would I need? What are your thoughts, or alternatives?

Question by bonners_87    |  last reply


Multi Console Av Cables

SOOOOO i've got way to many gaming consoles.. i collect them  i love them all DEARLY but i hate the fact i've got 20million sets of AV cables for each one. SO i went to gamestop and bought a multi console av cable.. covers my xbox (original), xbox 360, playstation 2, and gamecube/nintendo. so i plugged all my consoles in and fired on up.. and to my surprise i had no audio.. so i checked the av's on the tv side and moved htem and after much arguing with it all unplugged all but my xbox.. magically SOUND. so while the xbox was playing a movie i plugged in another console and bam sound was gone.. so my THEORY is this 1) Single Console it Works fine but i still have to switch the cables around every time i want to use another console 2) more than one console plugged in the audio from L & R is being diverted from the tv to the new console plugged in. but i am unsure how to test this.. and even more unsure if my theory is correct how to fix it. i bought the cable for next to nothing and am not above hacking it apart to get the results i want.

Topic by jgosselin    |  last reply


Does anyone know a quick easy way to do some multi track recording?

I need to make an audio track of me speaking with some background music.  I have a USB microphone for my pc but no software other than windows audio recorder.   Is there any basic free web software that I can use to make the two tracks and then put them together and export as an mp3 file?

Question by s3ctorsev3n    |  last reply


What is a good chip (IC) for audio switching to more than 2 inputs/outputs?

I'm attempting to make my own multi-room audio system. I realize there are paid systems out there, but they get really costly when you go beyond 2-3 rooms. And I'm doing it the old fashioned way of running all the wires to and from one place. The catch is I want to be able to do the switching remotely, ie no buttons or manual switches. I can set up something to send the signals to do the switching, my problem is I'm not sure what is the best way to handle the switching of the audio signals? I've read on a few sites that you can't just use any IC for audio signals. But the ones they recommend are only for 2 way splitting and I obviously need more than that. The plan is to have 8 inputs and 8 outputs. Only one input can be connected to an output at any time, but it also needs to be able to connect to more than one output (up to all 8) at the same time. And be able to handle other inputs being active and going to other outputs at the same time. Ie I'm listening to music in 3 rooms, and my wife is listening to different music in another at the same time. I go into another room and switch my music to the new room, without interrupting or interfering with what my wife is listening to. The IC used in this guide seems like a good starting point, but I need something a bit more advanced. I know there's gotta be a better IC out there for doing what I want, I just don't know enough about electronics to know where to begin? Any help would be greatly appreciated. Wireless, wi-fi, streaming, etc. is out of the question because I have yet to see a system that 100% of the time does not have a delay between 2 or more outputs. Hence why I am running wires. FYI I know basic electronics like what things are and I'm not afraid of soldering. And ofcourse I do plan to put my finished product up here as there is a lack of any mult-room audio projects.

Question by HighWing    |  last reply


Multi Function Device help needed, please! Answered

I've been toying with the idea of building a device incorporating several different devices, within one box - as small as can be practicably built. Devices that I'm hoping to have installed are:- (i) super bright led flashlight/torch (ii) mono/stereo audio amp and speakers - 3.5mm input/output (iii) built in re-chargeable battery (?V), with USB charge facility, wind-handle dynamo +(possible small solar cell?) - easy swapout to normal battery. (iv) radio - FM/MW - anntena input needed (v) emergency cell/mobile phone charger - USB to micro USB (vi) internal USB type swappable memory, possibly with inbuilt MP3 support, linked to amp/speakers (vii) clock/timer/temp guage (viii) ANYthing else that can be built into a small unit! has anyone else tried this kind of project? I have some (very rusty) electrical skills :) and would like to give this a try - but if anyone has done this kind of thing before, schematics and pics would be of great interest to me. thanks in advance guys! turboelf

Question by Turboelf    |  last reply


Which poteniometer for 8 ohm speaker into TEAC AG-980 Amp?

Hi there, I have this 65W amp hooked up to two pairs of JBL Control Ones (8 Ohm) and one Fenword 8 Ohm Speaker. This uses A/B/C/D with the amp's multi zone function. The Fenford is in our bathroom area (it's a small gym) and I want to attentuate the volume just for this speaker. Any idea which potentiometer I can solder onto the cable to damp the volume?

Question by bowlerboy1973    |  last reply


Individually Addressable Speaker Array

Hey! I had an idea for an array of many small speakers, each capable of playing different sounds so I could dynamically re-arrange which speaker is playing what. This would be paired with some LEDs and some water to make (what I hope will be) a fantastic visual effect. But of course all this is a bit over my head, so I'd like some feedback on my idea! After a bit of research, here's how I think I'll do it: General Concept Essentially what I'm trying to do is make a waveform generator with lots and lots of separate channels. I would hook up my microcontroller to several, multi-channel Digital to Analog Converters (DACs). The microcontroller would feed these DACs signals to generate the wave forms that I want for each individual speaker. The waveforms that the DACs output would each go through an extremely simple amplifier. The amplified signal would go to my speakers. I've attached a diagram that should give you a better idea of what I'm doing. Specifics The microcontrollers I'm looking at are the ChipKIT series from Digilent because I have access to a bunch of these. I'm currently planning on using the uC32, but I actually have access to pretty much all their other boards. The uC32 runs at 80MHz. The DAC I'm looking at is the AD5628 from Analog Devices. That's used in Digilent's PmodDA4, which I also have access to. Alternatively I might just order a bunch. They have 8 analogue outputs, and the SPI communication can run at 50MHz clock speed. I'm planning to have eight of these (for 8^2 total outputs). I haven't figured out what amplifier I'm going to use yet. It'll need to be simple and cheap, as I'm expecting to have 8^2 of them, but I'd also like one that can operate over a large band of frequencies. I've also attached two pictures of the speakers I'm planning to use. I kinda randomly acquired a lot of these, so I'd rather not switch to a different speaker type. According to Wikipedia, the highest note on a piano keyboard is a little over 4kHz. If I split the sinusoidal wave into 16 segments, that means an update frequency of 76kHz. This is way below my max operating speed of 50MHz so I think I can get away with it. Questions What am I doing wrong? I'm hardly an expert on any of this, so I'm certain there's a much simpler way. Are there ICs that do what I want? Maybe something that takes in a digital signal and outputs waveforms? This would be similar to how a servo controller would output different PWM signals, only changing the frequency rather than the duty cycle. What sort of amplifiers should I be looking at? This is my first time on the forum so please let me know if I'm doing anything wrong (or could do anything better).

Topic by JayWeeks    |  last reply


Amazon's very expensive cable, and the comments for it.

Http://www.amazon.com/AudioQuest-K2-terminated-speaker-cable/dp/B000J36XR2/ref=pd_sim_sbs_e_18 I was flipping around on Kotaku, and came across a page talking about the MASSIVE rip-offs involving HDMI cables. I read the article and found this link in the comments. This is a $9,000 audio cable from Amazon. I went down to the comments (mostly to see if some idiot bought this), and found some interesting comments. And by interesting, I mean I fell out of my chair laughing.  -------------------------------------------------- Some comments: " We live underground. We speak with our hands. We wear the earplugs all our lives. PLEASE! You must listen! We cannot maintain the link for long... I will type as fast as I can. DO NOT USE THE CABLES! We were fools, fools to develop such a thing! Sound was never meant to be this clear, this pure, this... accurate. For a few short days, we marveled. Then the... whispers... began. Were they Aramaic? Hyperborean? Some even more ancient tongue, first spoken by elder races under the red light of dying suns far from here? We do not know, but somehow, slowly... we began to UNDERSTAND. No, no, please! I don't want to remember! YOU WILL NOT MAKE ME REMEMBER! I saw brave men claw their own eyes out... oh, god, the screaming... the mobs of feral children feasting on corpses, the shadows MOVING, the fires burning in the air! The CHANTING! WHY CAN'T I FORGET THE WORDS??? We live underground. We speak with our hands. We wear the earplugs all our lives. Do not use the cables!" - By Whisper ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- "If there is one cable I would whole-heartedly trust to my Chimera-hunting needs, this would be the cable. No other cable has the tensile strength to properly and efficiently garrote a lycanthrope, asphyxiate an Esquilax or even gag a mermaid. Last week, using my trusty AudioQuest K2 (retrofitted with lead weights, bright orange latex paint and a generous coating of crushed glass stolen from the window of an abandoned church at midnight), I managed to snuff 3 golden unicorns in swift succession!  Pros: Quickly tears through scales, fur, bone, and adamantium with ease  Coils and uncoils from hip holster (optional) quickly and quietly  For a product fabricated from 1,000 Onyx Dragon fetuses, the price is unbelievably reasonable!  Cons: Shipping from the R'lyeh took far too long  Doesn't come in 10' lengths (which would be perfect for hydra, cerberii and other multi-headed creatures)  After every use, I can feel 6 ounces of my soul slipping from my core into the ether. But this may be due to the fact that I prefer to work without gloves. YMMV.  Overall, I would recommend that any hunter buy one, nay, two, of these immediately, and experience the difference that upgrading to the K2 will make in your next quest!" - By Valannin "Pantheon Outcast"

Topic by ry25920    |  last reply


Problems with USB Port on Homemade speaker box, why can't I listen to music and charge at the same time?

Okay, so I have a speaker box that I made myself with a kitted 7w audio amp. I put that in a box with a decent 4 inch speaker, and that was working great. Then I decided that I really need to add some sound reactive lights, so I got a TIP31 transistor and hooked that up along with a 7805 5v regulator to a USB port so I can charge my devices with it. So, the USB port works great, and so does the speakers and lights. But *not* when I plug in my device to charge while it playing music through the 3.5mm audio jack. It gives off this weird fuzzy sound, but still charges. On my multi meter it shows continuity between the USB port and the audio input and speaker, so I first thought that maybe I didn't have something grounded quite right, but it all appears to be set up right. Is there some sort of filter I can set up so that I can charge one device and play music at the same time on the same device? Or would need to set up the two circuits on different power sources? I would really rather not do that for the simple fact of trying to keep it simple... Here's my schematic of it (sorry about it being sloppy, I did it rather quickly but everything on there should be right). Here's a better quality picture of the schematic

Question by froggyman    |  last reply


Need help for a project?

So I've to make a multi-functional garbage container, which would be solar powered, and it must have an arduino . The idea is that the container will have 2 LCD displays showing a moving eye, a sensor for when something is thrown inside (the sensor must activate an audio device, which should say "thank you" at the moment) another sensor fr when the container is full (it'll have to make an LED blink) . So my knowledge about arduino is fair (about coding) and I wold need help for that and also for what components to use (mainly what sensor as I described) All those things are gonna be made for a project and our budget is about 150$ Thanks in advance!

Question by mkeranov    |  last reply


What can I do with a train table that my kids have outgrown?

We have a train table similar to this http://www.amazon.com/Melissa-Doug-Deluxe-Wooden-Multi-Activity/dp/B000O62UAI/ref=sr_1_5?ie=UTF8&s;=toys-and-games&qid;=1259456647&sr;=8-5 except our drawers are on the other ends.  We no longer use it for a train table.  My kids end up piling stuff on top of it in a heap.  The green top is actually 2 long, very sturdy boards.  I saw this https://www.instructables.com/id/Convert-a-Train-Table-to-a-Constuction-Zone-Table/, but that's still basically the same thing and my youngest is a 7yo girl.  The table takes up too much space in our apartment so I would like to convert it into something smaller and more useful.  Any ideas?

Question by maryshe    |  last reply


I'm getting tired of these EasyEDA promotions masquerading as Instructables projects

Seems there are at least 5 Instructables projects recently that are obvious promotions rather than true maker projects.  I'm disturbed by this.  I have no problem with someone recommending a company or product that played a role in a successful Instructable.  I do this all the time.  But if compensation was provided (free PCBs from JLCPCB because they are offering a fee order to anyone that promotes their service, for example) that needs to be clearly stated up front.  That is the ethical thing to do. But, the Instructable needs to be meaningful!  Not, "Here's how to build a 555 timer circuit using JLPCB".  That's completely bogus.  At least TRY to make something useful like a guitar stomp box or a multi-channel audio mixer or an Arduino relay I/O project.  Not some crappy 555 timer circuit, or basic transistor circuit, or a project that has no other redeeming feature than it looks cool when assembled on a JLCPCB circuit board.  Please.  Raise the bar.  If you are going to promote a vendor, don't be lazy, make it an interesting project that is worth my time to read. NetZener

Topic by netzener  


Acer laptop, what mother board does it use?

 I have a acer aspire 5542, And would like to know the mother broad it uses Thanks for your help Brand Acer Model Aspire 5542 Operating system Windows 7 Home Premium 64 Bit Processor / Graphics AMD Athlon II Dual-Core M300 2.00 GHz ATI Mobility Radeon HD 4200 Series Memory 4 GB Dual-Channel DDR2 SDRAM 667 MHz Hard drive SATA 500 GB HDD 5400 rpm Display / Resolution 15.6-inch HD 1366×76 resolution high brightness Acer CineCrystal TFT LCD, 16:9 aspect ratio, 8 ms response time, 60% color gamut Removable Storage 8X DVD-Super Multi double-layer drive Wireless Support Atheros AR5B93 Wireless Network Adapter 802.11 n, b, g Communications Broadcom NetLink Gigabit Ethernet, HDAUDIO Soft Fax Modem with SmartCP, Acer Video Conferencing with Integrated Acer Crystal Eye Webcamer featuring 640×480 resolution, Bluetooth 2.1 Input Devices Full-size keyboard including number pad, Synaptics touchpad with Multi-Gesture support Power 6-cell Li-ion with up to 3 hours of battery life Accessories Extra battery, external USB floppy, extra AC adapter Security software/features Acer Backup Manager1, Acer Bio-Protection1, Acer eRecovery Management, McAfee® Internet Security Suite 2009 Trial, MyWinLocker®, Nortonâ„¢ Online Backup Other Software Acer Arcadeâ„¢ Deluxe featuring Acer CinemaVisionâ„¢ and Acer ClearVisionâ„¢ technologies, Acer Crystal Eye, Acer GridVistaâ„¢, Acer Launch Manager, Adobe® Flash® Player, Adobe® Reader®, EarthLink®1, eSobiâ„¢, Google Toolbarâ„¢, Microsoft® Works with Office Home and Student 2007 Trial, NetZero®, NTI Media Makerâ„¢, Oberon GameZone, WildTangent® Memory card reader Media Card Reader supporting SD, MMC, RS-MMC, MS, MS Pro, xD Accessible memory slots 2 slots Maximum Memory Expansion Up to 4 GB Ports Headphone/speaker/line-out jack with S/PDIF support, Microphone-in jack, Line-In jack, Ethernet (RJ-45) port, Modem (RJ-11) port, DC-in jack for AC adapter Additional Ports None Audio Dolby®-optimized surround sound system with two built-in stereo speakers, Optimized 3rd Generation Dolby Home Theater® audio enhancement, featuring Dolby® Digital Live, Dolby® Pro Logic® IIx, Dolby® Headphone, Dolby® Natural Bass, Dolby® Sound Space Expander, Dolby® Audio Optimization, Dolby® High Frequency Enhancer technologies10, True 5.1-channel surround sound output High-definition audio support S/PDIF (Sony/Philips Digital Interface)11 support for digital speakers, MS-Sound compatible Built-in microphone ENERGY STAR Qualified Energy Star 5.0 Weight 6.16 lbs (2.8 kg) with battery Dimension 15.1 x 9.9 x 1.03 to 1.5 inches, 383 x 250 x 26 to 37 mm Thinness 1.03 to 15 inches, 26 to 37 mm Network Card Broadcom NetLink Gigabit Ethernet, HDAUDIO Soft Fax Modem with SmartCP PC Card Slot None Webcam Acer Crystal Eye Webcamera featuring 640×480 resolution Multimedia and Entertainment Acer Arcadeâ„¢ Deluxe featuring Acer CinemaVisionâ„¢ and Acer ClearVisionâ„¢ technologies, Acer Crystal Eye, Adobe® Flash® Player, NTI Media Makerâ„¢, Oberon GameZone, WildTangent® Warranty Limited 1-year and 90 day warranty options available depending on country, 1-year limited warranty on primary battery. Optional HP Care Pack Services extended warranty

Question by andreblue  


Cependant, il est une industrie moins standardisés

Développer la vitesse accélérée »sur le north face france de vêtements pour enfants, d'une part, est optimiste quant au potentiel de développement futur de cette zone, couplé avec l'industrie des vêtements des enfants domestiques n'est pas la naissance de la marque, est également un. opportunité pour la croissance de nouvelles marques parka north face femme également par le biais stratégie multi-marques pour améliorer les résultats du Groupe, la formation d'un point de croissance des bénéfices nouvelle. «Beaucoup d'entreprises chaussures pour enfants ou dans un modèle d'entreprise étendue, et non pas l'équipe de marketing, canaux non Monopoly, produits de gros. "Cependant, il est une industrie moins standardisés, à l'espace Luo jeu Zhengming. chaussure north face ABC, Luo Zhengming premier adulte copie sport système de monopole à la marque pour les enfants, et a réussi en 2007 les points de monopole ABC expansion rapide Geng Shibi 2006, avec des ventes de plus de pincement de l'interligne doubled.Increased, la carrière a atteint un "plafond", au stade actuel, chaussures pour enfants entreprises peuvent fournir à des gestionnaires professionnels plate-forme plus large plus large.

Topic by jimasda  


Instructables in the New York Times -- Romancing the Flat Pack: Ikea, Repurposed

Instructables, member mzed, and his Low-cost Spherical Speaker Array all were mentioned in Romancing the Flat Pack: Ikea, Repurposed by Penelope Green at the New York Times. ..."I think there is a movement around looking at all the products that are available -- this global stream of stuff -- and realizing you can tinker with them and rebuild them," said Michael F. Zbyszynski, 36, the assistant director of music composition and pedagogy at the Center for New Music and Audio Technologies at the University of California, Berkeley, whose own hack is a speaker array made from red plastic Ikea salad bowls, and who has made other musical objects from PVC plastic and coffee cans that "live in the zone of the hack," he said."It's all about not accepting what's presented for sale as it is," Mr. Zbyszynski said, "about not just doing a 'paint by numbers' of your life."...ReadyMade is part of a universe of D.I.Y. media and forums where Ikea hacks appear and are then found by Ms. Yap, who links her blog to them. It's a universe that includes Make magazine (more science than design-geeky, for the handmade-robot set) and Web sites like instructables.com, which was created by M.I.T. Media Lab alumni as a forum for its users to share knowledge about how to make or do practically anything, including, as a glance at the home page the other day revealed, a quick banana nut bread and "hacking a toilet for free water." Mr. Zbyszynski's speaker array, with its goofy "Lost in Space" aesthetic, first appeared there.See more news mentions of Instructables here.

Topic by ewilhelm    |  last reply


USB-phone of perfect voice quality on sale

Our company has many kinds of USB Skype Phone. Each design das more than 10 colours.1 Without screen:100% digital timbre with high quality, the same as PSTN2 U-disk: inside 128M U-dsik. It can be changed as the clients wish, save the charge of another U-disk take the files and phone with you, small and convenient.3 LCM:128*64 LCM, it can show multi-language and information of calls wonderfully, has many designs4 LCD:640 LCD、support English display, each letter shows 5*5 dot matrix. Better than common LCD5 Earphone port:Beside common features, it can use earphone to answer the phone, let your hands free.6 Desktop:Has the speaker function, use as the normal telephone, can be used as the loudhailer of your PCUSB Phone is the communication equipment that connected to the USB port of the computer, through the Internet; make a PC-to-PC call or a PC-to-phone call by Skype or other software. It offers high voice quality and cheap cost for the clients. It can call other PC or PSTN like common phones, or can be used as audio-device of PC or other voice massager software. It has special design as a mobile phone, used as a mobile phone, more convenient for making a call.Compare with common phones, USB phones don’t use the PSTN but the Internet. In the WAN, you can keep in touch with your families, friends, or clients, if you have a USB phone. When you communication with you Skype members, it is for free at all.Linkman:EricaSkype: erica888wQQ: 541006495MSN: c888160@hotmail.comTel: +86-755-27918959, 26626155,22015114LEAD TECHNOLOG DEVELOPMENT CO., LTDWeb:www.elecic.com

Topic by cobbyzhou  


Projection TV, all in one entertainment center

I have been playing around with the idea of a rear projection TV as a full all in one entertainment center. As most know rear projection TV's are large and very hollow. My idea is to add a mini-ITX motherboard, a Hard drive, a webcam, 2 USB ports on the front, an IR reciever, and a multi-microphone array. I may also add IR emmiters for use with a will remote, audio ports for a surround sound system, Light sensors to adjust brightness. My TV also has a Memory Stick reader that i want to use for the computer instead.  The motherboard and HDD fit in the base just right with plenty of room to stack a few drives if needed. and there is plenty of room for other accessories if needed. There is a door on the front of the TV with an extra input, with space for USB Ports. The IR reciever for the TV I think should fit a second. If not I will use some sort of repeater to split the input between the 2. although the TV's remote may not be needed at all. The Micro ITX board I have been looking at has a mini PCI port with a laptop style WIFI card, I plan so get some of the antennas used with a laptop and mount them as close to the top as I can get them. and maybe add a bluetooth/wifi card as well. The camera will be an internal laptop camera mounted at the top. The light sensor will be mounted ether on the front or on the top. (I think front will be better.) The microphones will be mounted on top near the camera. One on ether side. Thats the easy stuff. The hard part I want is for the computer to turn the TV on and off with itself. This requires something that will look at the state of the TV. (using the power LED inputs) and close the power button for a second if it needs it. 

Topic by jpayton    |  last reply


Digita Media Enthusiast/Tech Support Specialist

Job description ABOUT PAI PAI is a community rich in culture and diversity, distinguished by its high level of job satisfaction. We believe that our team members are our most valuable assets, so we recognize and reward great performance. We believe in open communication and foster an environment of creativity, loyalty and respect both for employees and clients alike. THE BIG PICTURE Do you like to get into in-depth trouble-shooting that would revolve around TiVo, DVR, or multiple types of digital video media? Do you excel in communicating with people in both a technical and non-technical way? Are you known for thinking outside the box when it comes to creative trouble-shooting solutions? If so, there’s a strong possibility you’d fit in well with an exciting new project at PAI. As Team Leader, you’ll assist in providing first-and second-level customer support for the full line of video media software products for our newest client. You and your team will interface with customers via telephone and email to provide troubleshooting, patches and/or bug fixes, version upgrades and software use tips. Ensuring the highest level of customer satisfaction is key, and will be measured by providing quality issue resolution within the established response time intervals and service level standards. DESIRED EXPERIENCE/QUALIFICATIONS • Basic professional understanding of video standards such as NTSC and PAL, frames and fields, and frame rate and basic video signals such as composite, S-video, Component, SDI and DV. • Basic understanding of broadcast digital video formats and compression such as Standard Definition, High Definition, MPEG-2, GOP Structure, Program and Transport Stream, as well as popular internet streaming, and download and desktop media formats such as Windows Media, Real Networks, QuickTime, MPEG-l, MP3, MPEG-4, etc. • Understanding of audio channels, digital audio sample size sample rates. • Understanding of non-linear video editing concepts. • Familiarity or use of a content management system or digital asset repository THE EVERYDAY VIEW • Phone, Email, and Remote Desktop support to resolve client issues, • Lead a professional team in providing world class support to leading industry customers • Verify and escalate bug reports to Engineering for resolution • Document problems/resolutions for internal/external knowledge base articles. • Effectively communicate with customers, both written and orally, to manage expectations through the trouble-shooting and issue resolution process. WE’RE LOOKING FOR SOMEONE WITH: • Excellent trouble-shooting/problem solving skills with high attention to details and good follow-through. • Excellent written and oral communication skills. • Ability to install and configure Windows Operating Systems. • Basic hardware, software, operating system and device driver troubleshooting skills. • Basic understanding of MS SQL and/or Oracle server installation and configuration. • Basic Linux/Unix installation and administration skills. • Understanding of Windows File Systems, configuring IIS, JBOSS, Apache, File permissions and Disk management. • Ability to troubleshoot basic networking and connectivity issues including TCP/IP, DHCP and DNS. • Ability to effectively work with a variety of personalities and occasional stressful situations. • Ability to multi-task under time constraints. • Able to work Evening and Late Night shifts. • Experience providing support within a Network Operations Center environment, • Digital Media or related Software or Production Service or 2+ years Digital Media Encoding/Production Experience.  To apply: 142a+8972@c1.catchthebest.com http://pai.catchthebest.com/apply/142a/8972  Cindy Law HR Manager 858-495-3525

Topic by clawpaisd    |  last reply


Magnetmotor - really impossible or just supressed?

When someone starts talking about a so called magnetmotor than most people judge right away.Laws of physics, perpetuum mobile is impossible, magnets are static....We all know the limitations nature puts on us... That however did not stop quite a few people since the 1950's to build working magnet motors. Or, to be precise: To make the claim, show them and then somehow disappear. A few though seem to have survived and even claim to make good business. Securely closed machine, stellite tracking and 24/7 online monitoring. Either just a bad and long running hoax or a real attempt to keep a secret secret. Even the somewhat famous Yildiz motor showed off around the world only to disappear.Some like them, some don't. Either way all this sounds like the perfect conspirary theory LOL So lets take a look on what is fake and what might be real but missing some vital clues. You can find several good Youtube channels created by people trying to build a working magnet motor. Some of them have no problems to admit failure and still keep trying and updating their projects. Did long enough and you see two outcomes. The first is giving up or "realising" that it will never work. The second often seems like a user is getting some relly good results and is really close to keep the magnetmotor running. Both disappear without and updates or traces. Now of course this is just confirmation that it will never work, but then again: What if it did already quite a few times? Even Tesla had patents for a magnetmotor and so far none of his patents were a hoax. Although none of his patents allow to actually build a working devices without some additional info and knowledge. And that is the key that I am trying to get: The lost knowledge.How can a magnetmotor never work? That one is quite simple from the start. If a linear model won't work no matter where you start then a rotary version will fail as well. And if a linear version works, it has to do so far at least 5 segments and with preferably increasing or at least constant speed. Having said that and assuming you know a little bit about magnetism: Ever wondered about shapes of magnets?? The common types are block, round like a bar and those disk like ones, some even with holes. A less well known version is the ring magnet. You can look them up as well as their corresponding magnetic field geometry - or what is assumed to be the right geometry. To give you a clue: All those floating spinning toys use a ring magnet in the base and onother one in the spinner. In the center is a dead zone for the magnetic field that is far lower than further out on the ring. And the strnger outer fields also reach further - giving the entire spinner a bowl like area to float on, the spinning just stabilises it like a gyroscope. A similar flat disk magnet wouldn't have this indentation in the field but rather a dome like sphere. The ring just kicks a dint into this sphere if you don't mind the simpification. Similar changes in the field structure happen when you combine two or more magnets. One example we all know is stacking identical smaller magnets. And often we are suprised how much stronger two thin disk magnets are compared to a single. Distance however sets a certain limit. And take those hook magnets... Just a small ring magnet in a metal pot with core. Remove the magnet and just by itself it is far weaker. Why? Quite simple.... The same way a transformer core directs the magnetic flow, the metal part of the hook magnet provides a shortcut for the magnetic field - and in return all is much stronger ;) Now you have some more clues, but still there are tons of options for failure... The most common is the sticking effect. No matter how well you planned and designed in most cases you linear or rotary prototype will stall sooner or later. Even if started manually at high speeds some seem to run very long but once they slow down and stop it is obvious they always stop where the magnetic field won't allow the binding effect to be overcome.Wouldn't dare to say that I have a working magnetmotor, but I might have some clues you want to try if you decide to give it a try yourself. So how COULD a magnetmotor actually work? Like in the Perendiv examples all over the web, you could aloow a moving responder to the rotor. Like a piston the responder will be lifted in areas it would otherwise limit or reduce the speed of the system. Well designed only a few mm would b required but it also means wasted energy to move the responder. Then there is the nice way of modifying fields by adding magnets in different angles and polarities. Lets say towards the end of your stages on the linear model it is hard to overcome the binding effect from the end of the previous stage. The perendiv model would now somehow change the distances. But you can also add magnets to lower the binding effect ;) Like a ring or hook magnet you can shape the field and offer a stronger repulsin field or a lower binding force. Last but certainly not least is the option of adding magnetic metals like iron or somehow weirder ones like bismuth. So, do we have any examples of something very common utilising any of this? We sure do :) Take a speaker apart and you end with the cage, the membrane, the actual work coil and the magnet. We don't need anything but the magnet so take a good and very close look. What in the audio world is called a shield to prevent the magnet from messing with things close by is exactly the same as on a hook magnet ;) Only difference is the tiny gap for the coil. The magnetic field is directed into two paths, one by the metal core, the other by the inner enclosure of the magnet or the magnet itself. The coil operates in the area of maximum flux.Last hints... If you take two identical and strong magnets with north or south facing up then it is quite hard to push them very close together. But check what happens if you try the same wen both soth poles (or both north poles) are placed on a magnetic surface - if in doubt your standard fridge door. Suddenly you can move much closer together with the same amout of force (not considering the added friction!). And similar story for opposing configurations. Where in free air or on a table the magnets would just jump together, on a metal plated you can move them much, much closer before this happens. Copper pipe and magnet fun :) Ideally you would have a straight copper pipe and a cylindrical magnet that has a loose fit in the pipe. Aluminium pipe work too or even a roll of aluminium foil if you have nothing else. A magnet in the pipe will travel very slow down the pipe, friction is not an issue here. So what is slowing it down? The magnet creates a field in the pipe and through that the pipe generates electicity. And funny enough this electricity creates an opposing magnetic field in the pipe - the magnet slows down. Even if you glue it onto a wooden stick it won't rush through it. Trying to push it by hand and you feel the created resistance. The faster you push, the harder it is to push! If you made it all the way down here with the reading then I have to assume you fit into one of three of my categories. a) You are a total sceptic and just read it for your amusement. If so, then please don't post a reply with usual negative feedback, instead see it as the same fun you had reading it ;) b) You are at least curious and like to play with magnets. In this case take the above as inspiration to explore more ways to have fun with your magnets! c) You are more or less frustated because you wasted a lot of time and some money to build a magnet motor that just won't work. A and B might go on and enjoy the fun, C however might want to read very attentive now ;) If you take some indicator sheet for magnetic fields, like these funny green ones, and play with moving magnets then you see a very interesting effect on the "screen". The otherwise static field lines change chape and sometimes even seem to disappear or shrink. With a small rotor assembly it almost looks like flashes when the magnets move past each other. This effect is often totally neglected and to be honest I overlooked it for a long time as well. Being able to see how the magnetic field changes gives the thing an whole new dimension so to speak. Creating a magnet with a complex shape is difficult to say the least. Only ferrite or ceramic ones can be used and you would cut of machine them according to your desired shape and with regards to the orginal center of the magnetic field. So most people revert to the classic way of shaping by adding magnets of various types, sizes and amounts. Modern neodymium magnets make this trial and error process easier as there are many sizes and strengths available. Add a detector shield of suitable size and you have hours of fun time ahead of you. But doing so in any rotary assembly is next to impossible. So what did Yildiz differently and what was missed so many times? Yildiz took it a step further and not only provided "shunts" to create very strong magnetic field from the generated electricity but also a second rotor. Since we all start small lets focus on the basics first. Remember the hook magnet and speaker or the copper pipe? Some examples for shape shifting your otherwise static magnetic fields: 1. A magnetic metal "connection" from one (low in the armature) pole to an opposing (high in the amature) pole with cause the field from the "high" pole to "bend" towards the connected magnet. 2. A magnet with an orientation of 90° to the last magnet is the sequence will severely influence the field of this last magnet! This goes for either orientations! 3. Adding a non-magnetic "shield" around a magnet, like a piece of copper pipe, will not affect the static field of the magnet. However it will severely alter the field of the enclosed magnet when another magnet passes it! It will also affect the overal field during the passing as the moving magnet will also induce a field in the copper by affecting the field of the enclosed magnet! Thickness and lenght of the shield influence the strength of these effects. 4. In a simple perendiv motor design the bar that creates the attraction for the spinning part is a magnet too. Either a long bar type or two small ones with an iron or nickel rod between them. There is no need for a piston or something that drives the bar up or out of the way ;) Just use the right magnet at the right spot on your rotor to repell the bar ;) Mount the ar with suitable springs and you suddenly can have multiple stages on your rotor instead of just the usual one! Don't forget the moving magnet on the opposing side of the segment in question though as otherwise you still will get stuck. (Hint: You can place a small but powerful magnet in the center of the opposing bar ;) Just make sure you limit the springs movement so the bar won't be pulled closer)Ok, hold on now! Does a magnet motor actually work or not? I can only give hints and say the laws of physics as we know them apply to magnetmotors the same way as everything else. Unlimeted motion without supplying energy is not possible. Limited motion with adding or using energy however is still possible and real. The same is true for being able to machine, 3D print or otherwise manufacture at very tight tolerence and accuracy levels. This includes bearings or bearing systems with very little friction losses. Just check these floting and rotating magnet toys that look like a spindle. Only a tiny needle like pin makes contact with a glass surface - next to no friction loss. A proper and supposedly working magnet motor should provide more energy than what it uses - one way or the other. No law of physics lets us get around the fact that such a motor could only keep spinning if the produced power or motion energy is at least the same as what is required to make it move. Magnets lose their strenght over time, they are like a very slowly depleting battery. So, isn't it funny that all magnet motors so far that claimed to work also had the requirement to replace the magnets once the things fails to work or start? And if you leave a very strong neodymium magnet shielded from outside fields or magnetic stuff than your grandkids will still find a quite strong magnet. Do a little performance test with your new magnets, like how much force is required is required to lift them off a steel plate. Make the same test with the magnets once you played around extensively with them in your motor. Now take a spare magnet that was never used from the orginal batch and compare both against each other ;) If the motor would not use energy then why are the magnets depleted to a certain degree, realted to runtime and usage time? Wait a minute! Does that now mean it actually works? Lets just say energy is certainly used. We only know similar effects from electromagnetic systems. But did anyone ever really check how much actual energy is in magnetic field generated by a non electric magnet? Get a good sized N52 neodymium magnet and check how much force is required to pull it off a steel surface. Now try to get the smallest sized electromagnet capable of that force and check how much energy it consumes at the level that equals the pulling force of the N52 magnet ;) Makes no sense to even try to compare these you will say now. I just say energy is energy and we were formed to only think in certain ways and don't even try silly things like this ;) To keep the fun up let us imagine we would actually have a similar energy available than what our electro magnet would require. In reality more because we wouldn't have electrical or flux related losses in the metal around the coil. Or is the imagined reality, no clue ;) If true it would mean even a motor with very bad efficiency would be able to create huge amounts of torque. Well, torque is basically acceleration. Which would mean our motor would not just be happy to spin, it would speed up until the bearing fail or the thing is ripped apart. Imagine a dental drill of that size and weight suddenly falling apart at full speed... Every example of motors claimed to be working, that are not fakes, seem to be happy no matter what the load is. It the thing turns a generator than it would have to slow down a bit with the increased load but they don't. With no limited factors otherwise this makes them a fake. Even a perfect motor would have to react to load changes.... Don't we agree that the stronger the magnetic force or field in a conductor the stronger the resulting magnetic and opposing field of the conductor? We use the difference to either drive a motor or take out electricity... But if you take the "open" shielding of a magnet in a changing field than the influence of the shield on the overall field gets stronger with stronger field changes. And properly desinged and orientated they would actually double as a natural limiter for the rotation speed. Once the electrical energy in the shield becomes too strong it will be able to cancel out the field of the enclosed magnet...If we assume a magnet motor is really possible and works with the intended output to keep it spinning or even take energy out: Then what would be possible downfalls that stop this thing happening in everyones garage? We can explore the stars but so far no one bothered to invent anything to visualise magnetic field in a 3 dimensional way other than by simulation. No realtime and true observation like this. The few working technologies that exist rely on sensors, interpretaion and filling in gaps. But imagine something like a detector shield as cloud! And then even better with selctive spacing to get a realtime view of where exactly the field lines go. All we can do is forget our teaching and try it out anyway ;) If by some mistake a magnet motor would really work right away, then chances are high the inventor would wonder why that thing takes off like mad and how to stop it. Unless well prepared it would certainly end in the destrution of the motor. But the inventor would know what to look for in the next prototype. The logical conclusion would be to the couple the energy taken to the speed while physically limittin the free load speed. The other one would be the design the electrical generator around the and within the motor. To even get close to this point you would have to spend endless days and nights working on finding a solution. The closer you get the more disappointment when the final model still fails to keep spinning for more than a few hours. Most people will then accept defeat and move on... Still not saying it actually works but if you made it to this point in time where it could be easier to move on and do other things:Ever wondered what would happen if you "shield" a magnet with a coil? Of course nothing would happen as we know. But try this in some fixed assembly that allows you move another magnet through the field of the shielded one. Perferably witha force gauge or some option to read out the energy required to move it through the various stages of the field. See what happens if you short the coil or add a resistor to it ;) Now if this coild is able to produce electricity then the more we use the more the effects on the required force would change. What do you think would happen if you combine common coil relations of electric motors to a "coil shielded" magnet motor? Right, all these coils would interact with the magnetic fields of the coils they are connected to... And through that with the overall field surrounding the enclosed magnet..... I leave up to you to imagine how these interacting coils could provide "resistance" or "acceleration"/"surplus electricity"...Like they say: You can only find out if you try ;) To keep up the positive thinking: A permanent magnet just sticks to any magnetic surface and does so with the same force. But the real energy loss in terms of getting weaker can almost be neglected. Any electromagnet capable of the same holding force woul require ongoing energy supplies to keep it up. It is using energy the same way the permanent magnet does! The difference is the permanent magnet is not seen as anything that would provide us with energy.... And if it can't provide energy other than passing through coils then why the heck does it keep sticking to the fridge year after year? It does require energy to keep this weight up doesn't it, even if you add a thin teflon disk and oil to reduce friction? ;) No magic, no "free energy" bogus, just plain physics viewed from a slightly different angle than what we learn in school ;) Have a good laugh and a good beer, then read it again and just consider some of the things here that are not mentioned in any literature about magnetism that we commonly use. Now I got you thinking, didn't I ? ;)

Topic by Downunder35m    |  last reply