Noise Maker

What makes this thing tick, is it the black dot in the pic and if so where can a person by this or at least make it louder on 9volts.  http://news.webshots.com/photo/2227393080102250713YfmCLm

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


Noise or Music?

The "Bose" sound system is based on chamber resonance like that of musical instruments. This is the difference between a whistle and a flute. The mouth piece of a trumpet is raw without its additional plumbing. The noise of a piezo-electric sounder is raw, but chambered to resonate...better. A trumpet is basically an acoustical waveguide device. Consider this and lets see if you can "WOW!" the crowds with your sounds. The trumpet mellows the sound of the mouth piece by reflecting the sound repetitively off the inside walls of the horn. The angle is low so the acoustic wave reflects many times along the length. What works for you?

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


Fix noise in amplifier?

 recently make a lm386 amplifier  test it with battery and my eleminator power supply it is working fine. i also add a filtering capacitor. But when I connect it to a 12v adapter it marking some hum noise .So how can I repair it?

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


Noise cancelling megaphone

Hello all:) I was wondering if I could get some help and advice about a project I've had in mind for a while. The idea is to use a modified electronic megaphone to produce sound that's antiphasic of the microphone input. I want to keep the execution as simple as possible to retain signal quality and keep it something I might be able to do myself with a little studying up. I got the idea when I noticed if you incorrectly wire a couple speakers one can produce output that's 180 degrees out of phase, cancelling most of the sound emitted. Ultimately I'd like to use the device to help quiet the sounds of the power tools I use as a favor to my neighbors and to save my hearing a bit:) This should be doable since I could keep the megaphone near the source. Thanks a bunch for any help, Pete

Topic by wolf35nine 6 years ago  |  last reply 6 years ago


Bird scarer - with noise

I'm looking for any ways of building a repurposed material bird scarer. Not a visual scare (scarecrow, CDs/foil, silhouette) but something that makes a bit of noise. I know a keen allotment owner who has purchased an air gun to shot into the air and scare parakeets ! He would hate to actually hurt a bird - and I feel there has to be a better way. Rattles - tape recorders that can be set outside, wind powered stuff ? Anything that might stop my friend eventually hurting himself (I'm also concerned about the effect air gun pellets could have on the soil). Thanks for any suggestions. Victoria J

Topic by Victoria J 10 years ago  |  last reply 10 years ago


How do I build a noise cancelling box?

I have a small water pump in the basement that creates a lot of noise that can be heard in most of the house. Is there a way to at bulid a 4 side + top box that really works to cancel out at least some of the niose? What materials works best as noise cancelling? Thanks!

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


Cheap Chinese Audio Amp: How can I reduce the noise? Answered

I have a $2.50 audio amp from China.  It's what you'd expect: some rusted components, some scratches on the PCB, and yet it still works.  I use it with a 9v battery, my phone, and a big, repurposed car speaker.  It get's loud enough I think it can easily destroy the speaker with that 9v.   My question: At any volume worth using that amplifier for, there's noticeable noise.  What can I do to remove this?  Some research shows that a capacitor may help, but where would it go?  Thanks

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


Make some noise with 110v sensor

I have a presence sensor 110v (lights a lamp) and I need make some noise too. I already insert one ac adaptor 12v with a resistor anda a pc speaker and make a irritant noise, anyone have othe idea thanks

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


Is there a cheap way to reduce noise from workshop ? Answered

Hi all, I was wondering what the cheapest way is to reduce the noise coming from my workshop, which is basically a tin shed. Im using it as a small forge and appreciate that the sound of hammer on anvil is not blockable (think thats a word) but i also use a belt sander, power tools etc, so would like to try and minimise the noise heard outside. Any ideas ?

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


Thingamakit - Make a Kit Then Make Some Noise

Put together this kit and you'll be making all sorts of noises by turning knobs and playing with light! Looks like a fun kit to put together and at a cost of $55, $65 with an enclosure, it's another good entry point for soldering. Thingamakitvia Make blog

Topic by fungus amungus 10 years ago  |  last reply 10 years ago


cutting sound from noisy neighbor

How to stop noise coming thru adjoining wall from noisy neighbor

Question by boss44 9 years ago  |  last reply 9 years ago


Phase Cancellation to Prevent Feedback

The Grateful Dead's wall of sound prevented feed back by having two mics for each vocalist with one of the mics 180° out of phase of the other. Then mixing both mics on the same channel. So the only information that wasn't canceled was the voice.  This gave me an idea. I took a handset and added a mic facing backward from the existing mic. Then wired the second mic out of phase. Apparently there's more to it electrically then just wiring the other mic backwards because the handset went dead. Is this possible with just parts salvaged from old phone equipment?

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


LEDs are putting static on my stereo?

I wired a outlet so I could plug in a strip of LED lights that are able to run in different modes (flash, fade, different colors, etc) When I turn the LED lights on, the stereo, that is plugged into a different circut, has static that goes with the tempo of the lights. When I turn the lights off there is no static. What gives? Here is what I got. http://www.amazon.com/dp/B0040FJ27S/ref=pe_175190_21431760_cs_sce_dp_1 I used them in another part of the basement and they work good with no problem. i also checked the outlets with the 3 light tester and it says it is wired correctly.

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


Oscilloscope PSU whining noise?

My oscilloscope is a Philips PM3055. It's a CRT type with a modular internal design, one PCB is the PSU, one is the front panel, a few are TTL, etc. When I try to turn it on the screen is blank and the PSU makes a whining/whistling noise, and does not function. The whining persists regardless of connection to other boards and mains ground. (mains ground is normally not connected to the PSU, but there's a connector) I have found no bulging/leaking capacitors (though I have no way of testing capacitance) or other visible damage, except for cracked plastic on the front panel. But that's merely cosmetic. Replacing the PSU is not an option, since the scope is old and obsolete. Neither is buying a new scope. I am broke. All help greatly appreciated! If you help me fix it, I might just send you one of those fancy patches. I can only provide cellphone-camera quality pictures at the moment, and for that I am sorry. [Edit / update] I contacted Advance Product Services, And they sent me the complete service manual for the scope, free of charge. Those guys are awesome!

Question by Kirbsome! 7 years ago  |  last reply 7 years ago


Help with some noise filtering? Answered

I've attached a file of a project I will build, but should I need some noise filtering capacitors? Thanks, BoK

Question by Balls of Kevlar 7 years ago  |  last reply 7 years ago


I want the background noise!

I have a recording of a conference call I have to transcribe. Unfortunately the recorder was placed near a noisy co-worker, who has become the main sound during the recording. Is there some way to pull out and enhance what is now the background noise, my important call?

Question by 9 years ago  |  last reply 9 years ago


Noise filter on iPod dock

I recently completed a project where i made my own iPod Touch charging dock for a set of PC speakers. While testing it out i noticed there is some background noise/feedback coming through the speakers any time the iTouch is actually charging. Is there any way i can shield against this interference? Or is the proximity of the headphone jack to the iPod connecter to much of a problem to overcome without alterations to the iTouch itself? I've notice this problem before while listening to my iTouch through it's speaker or headphones when it was plugged into a wall charger or PC. https://www.instructables.com/id/Laptop-Speaker-system-with-iPod-Touch-dock/

Topic by mpilchfamily 7 years ago


Shure Noise Isolation Phones

I have Shure e2Cs. But i've always wondered what the difference was between the g (gaming) series, and the c series. EG. The difference between the e2C and the e2G. I though someone here could tell me. -Regards

Topic by evy-wevy 12 years ago  |  last reply 12 years ago


Something is making a mysterious noise.

So it's been awhile! Between school, homework, work, and playing with gadgets and such, I haven't gotten the time to post or make an instructable for quite a long time. But now, I'm back with a question. I see lots of new users here, and to them I say welcome to the community! You are going to love  it here, everyone is helpful, and you'll find answers to just about everything. I also see some members here that were around when I still used instructables. Remember me? How are things? :P Ok, so now for my question. A few weeks ago, after flushing the Toilet, a strange noise began behind our refrigerator. It was king of like a rattling, but not so much that as say, a prize wheel at a gameshow spinning and hitting something heavy. It's really quite odd. The refrigerator is a model with the built in water and ice dispenser. I googled it, and many seem to say it is something called "Pipe Rattling", but I don't think that is what it is, because it only started a couple of weeks ago and we have had this fridge for a year. I have drawn a diagram of the first floor of our house to help you get a better understanding of where the fridge is in comparison to the bathroom and the toilet. Like I said before, the noise only occurs after we flush the 1st floor toilet. Another odd thing about it is when the noise occurs. It can make this rattling as the toilet is flushing, directly after the toilet has flushed, and it has happened up to a minute after the toilet is finished flushing and refilling the bowl. The noise goes for about 5-8 seconds each time, and it only sounds once after each flush. We have not made any additions to the house before or since it started, have npt experienced any severe weather, and have not modified any plumbing in the house in quite a while, and never in that area of the house. In the incredibly bad sketch I made, you can see the bathroom, and the incredibly bad drawing of a toilet. The fridge is indented in the wall so there are cabinets surrounding it. Any thoughts on what this noise can be?

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


Noise Pollution B-Gone?

I liked the TV-B-Gone Instructable, it was entertaining and informative. Now I wonder if one could "snipe" one's neighbors' stereo set while they are playing Slipknot full blast at 3 am? (Calling the cops only does so much, I'd rather hit a button and go back to sleep.) I only have the most vague understanding of EMP technology, is that a possible/plausible implement for a solution? Or is there something else?

Topic by V-Man737 10 years ago  |  last reply 10 years ago


Signal-to-Noise Ratio Not Good

Dear Instructables.com: Look, I respect Instructables.com's right to make a buck as much as that of any other site that proffers user-supplied content, so please don't misunderstand this comment.  I'm not decrying the presence of ads on Instructables.com. I'm bothered nonetheless.  Until recently, when I landed on the Instructables.com home page, I would see two columns of fascinating, deliciously creative projects.   When I visit the site now, I find that the page is dominated by ads.   Dominated?   Yes.  Now I have to scroll before I see *any* actual Instructables.  Now in the interests of full disclosure, I'll confess that I've got a mere 800 pixels of vertical resolution to work with, but come on folks, no Instrucables above the fold?  Really?  And I've noticed with some dismay a growing number of featured projects from external commercial sources like This Old House (of which I am a *huge* fan, btw). I'm not calling for a moratorium on ads on Instructables, or anything absurd like that, but I do feel that the kind of projects that make this site truly great (those from individual makers, crafters, and builders) is beginning to get crowded out.  Keep the ads, by all means, but please keep the spirit of personal creativity in focus as this amazing site evolves. Thank you.

Topic by jdtwelve12 8 years ago  |  last reply 8 years ago


Active Noise Cancellation for cars not equipped

I am playing with an idea. Higher end cars come with active noise cancellation systems to make the drive quieter and more enjoyable. However compact and subcompact class cars do not. With the noise canceling technology is available on every shelf for headphones, I am wondering if this could be hacked and repurposed to reduce road noise in a car. The system (Im presuming) would require one microphone, one noise canceling circuit board, and one speaker per wheel well. So it would require two pair of noise canceling headphones to accomplish. The idea is to improve the cabin noise quality in an off the shelf kind of way. Currently there are no aftermarket systems within the normal financial reach of most people. Only a hand full of aftermarket systems out there are available and priced @ 4K USD or more. If this works, it could be marketed at around 100 USD per unit. And provide a much nicer driving experience to the compact and subcompact cars.  By placing the microphones under the carpet and on the wheel wells metal surface the system should ignore the stereo, and correct road noise transmitted from the wheels to reduce cabin noise. Stereo interference is a common problem with cabin mounted microphones on OEM systems. So, your mission if you choose to accept it, is to devise a way to reduce road noise in a compact or subcompact car using off the shelf noise cancellation circuitry available to the average person. If your successful this should be a very easy way to upgrade most cars not equipped with such a system. Having a noise canceling system in a car reduces noise fatigue, and improves the driving experience for all of us.

Topic by ydeardorff 5 years ago  |  last reply 19 days ago


How does this mysterious noise work?

There’s an elementary school on the next block about 100 feet away from our house. Everyday from monday until friday, the noise coming from this school wakes me up about 6.30 am. What puzzles me is how could the noise reach me when our house is inside our block and the school isn’t even facing our block! -also how the noise could be ignored by the school’s nearest neighbors when it’s so loud at 100 feet away. Another thing is the voices I hear are too big and loud for elementary age students but I don’t see any high-school aged teeners at the school. And the greatest mystery is that I only hear the noise inside my room -never outisde! I know there’s a scientific or audiological explanation for this but I also know that getting the answer would take a lot of time and I just don’t have that. Can anyone give me the explanation for this?

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


Active Noise Reduction as Software--possible?

While on vacation last week, I was trying to watch a sophisticated, complex movie (something with Muppets) on a laptop and was having trouble hearing the audio through headphones, due to the general loudness of my family.Is it possible to actively reduce noise through computer software? I assume that the programming itself would not be too complex, but I don't know if the time taken to process microphone input and use it to modify audio output would be too slow. The only place I found through Google that discussed this was a forum wherein the members couldn't get past the concept of attaching a microphone to a headset. I also found a schematic with instructions for building headsets, but I would prefer a .exe file.

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


removing power supply noise from my bluetooth speaker

Hello guys, so i made this bluetooth speaker and when i hook everything up and runing i get this weird noise from it im pretty sure it has something to do with the voltage step up but im not sure how to remove the noise would be great if you could help :)  yeah yeah i know the schematic is pretty epic, lets pretend that the two amp audio input and bluetooth dongle audio output are connected, and ignore the fact that there are no switches and stuff like that pretty sure thats not hwat causing the noise.   i know that theres a way to remove noise by using capacitors but i dont really know how to use them. thanks for tips :)

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


Does anyone know of a noise that can annoy my neighbors while they are in their backyard?

Every single day my next door neighbors go out to their back yard and make alot of noise ( screaming children, adults yelling and talking very loud, etc.) They know that this bothers all of the surrounding neighbors but they just don't care. I can't take anymore and before I move I want to see if there is a way to annoy them with some kind of high pitched noise so they will be forced to go inside. Help! Thanks!

Question by 9 years ago  |  last reply 9 years ago


How to reduce noise like baby crying in my home office so I can work on the telephone from home?

I will begin telecommuting and I have a 2 month old baby and a 2 yr old.  A noise cancelling mic will reduce some sound but I want to make sure customers can't hear my household noise coming from other parts of the house.  What can I do to reduce sound to the home office I set up in the extra bedroom?  I am in a rental property and cannot make permanent structural changes.

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


my sisters old stereo system seems to be making a 'ttit' noise when i listen to a song with bass. Please help!

it sounds sorta like a small piece of meatal rataling (or a spark jumping through the air) . the speakers are nice sony speakers but are old and have been out in an OLD barn. the speakers connect bye a wire in a clamp. there are two different rows that have a red and black wire ports, but only one row works. please help?!?!

Question by jayman242 7 years ago  |  last reply 6 years ago


Job - Silence your neighbour

I want someone who can actually create the setup described here - lifehacker.com/5852903/silence-noisy-neighbors-by-transmitting-signals-through-their-own-speakers.  My neighbour is very noisy and they don't decrease it no matter what. If someone can build the setup or come with their plan to achieve the goal, I can pay whatever you demand.  My neighbour has 3 loudspeakers and 2 big-box speakers. He uses an amplifier with a CD in it. He also uses few mics sometimes for his band to sing. they sometime sing for 24 straight hours.  Please help and advice.

Topic by VikasS6 4 years ago  |  last reply 4 years ago


60 cycle hum in a power supply

I recently scavenged a 5 VDC phone charger to use as a power supply for my small FM transmitter. I have the transmitter plugged into the computer so I can listen to my favorite internet radio station on the stereo in the living room, rather than only in the office. The whole thing works really well, except that during quiet songs or in between songs, I can hear that 60 cycle hum coming from the radio. Does anybody have any suggestions (cheap, free, or re-purposed parts are a plus) on how to minimize this? I don't want to spend money on this, and simple is my favorite adjective with electronics projects. Can I put a capacitor across the + and - wires to smooth out the power? If so, what size would be good? Thanks for your help! ~PC

Topic by Poppa Chubby 10 years ago  |  last reply 9 years ago


How do I make a noise-detecting traffic light?

I am not sure how many people have seen these, but they are used in Elementary school alot. Basically, when the light is green the noise level is at the right level, if it is yellow it is getting a bit too loud and red is WAY too loud. I want to use this type of idea in my classroom. It doesn't have to be a traffic light but a series of light. I just don't know much about wiring.

Question by MrFish7 10 years ago  |  last reply 10 years ago


How do I obtain a noise permit or discretionary license in Phoenix?

I can't seem to find how to obtain one of these two documents from the city of phoenix (or maricopa county, as this might be a county issue). 

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


Is it possible to cancel out sound using hi-fi speakers? Answered

I know that noise cancelling headphones exit but is it possible to scale that up and have the out-of-phase noise played through speakers?  If so, and the microphones were against the wall of the offending neighbour and the speakers were to be aimed at that wall, would the noise be noticeably reduced? Thank you.

Question by FriendOfHumanity 9 years ago  |  last reply 6 months ago


Cell Phone Noise in FM Transmitter

I have recently built a dock for my HTC touch for use in my car. The dock is basically a holder with a cheap FM transmitter in the back. The FM Transmitter and cell phone are connected in parallel to a 5 volt USB car charger. For some reason, the FM transmitter is picking up noise from the cell phone. It is digital noise, different frequencies and beeps that vary depending on what I am doing on the phone. The noise is very quiet, but still there. Is there any simple solution to filtering out this noise? Will a simple capacitor do? Thanks Andrew

Topic by computerwiz_222 9 years ago  |  last reply 9 years ago


Slowing a noisy handheld fan?

I am trying to slow a battery-powered (two AA batteries) handheld fan. It's obnoxiously loud for my project, but slowing it to about half speed will help cut the noise. I think running a resistor somewhere in the circuit will do it (planning to lengthen the wires anyway, so physically adding in isn't the issue,) but frankly there's a reason I'm in art instead of engineering. I've looked at the online calculators, but they want the amperage of the motor, which I don't know. What kind of resistor do I need?  Or is there another way to slow or quiet it down?

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


How can I fit a Semi Truck horn onto a bike or a Vespa? Answered

Infmom on Lifehacker had an idea here - http://lifehacker.com/comment/16894792 - and personally I think it might safe a few lives. I'd love to hear anyones' thoughts on this.

Question by Aquilla 9 years ago  |  last reply 8 years ago


Soundproofing?

How could I sound proof my room? Particularly against the "bass" end of the spectrum? I know you can use foam panels that are cheap enough but would they also help absorb the bass too? I'm getting tired of my parents yelling at me whenever I play music. I don't nessesarily play it loud, but with my subwoofer on, it goes low enough to rattle through the whole house even at low levels. I'd like to make this a competition, the best idea I will pick out and do to my room, I may even think of a prize.

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


I have built the "Sweet Portable Guitar Amp" but there is a very load hiss.? Answered

I have built this and its working fine, except there is a very load hiss along with the audio. I have only made 1 modification: I have connected the negative terminal of the battery to the 2nd signal of my stereo 1/4 inch socket, and the ground to the ground circuit ground. This causes the circuit to turn on when a mono jack is plugged in. Any ideas why I am getting this hiss? It sounds a bit like static on a TV but I have used shielded cable. Thanks

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


Ground loop question? Answered

Hello , im making a little guitar amp with ROG tonemender as preamp and tda2003 power amp.This is my schematic , can you check it for me please!. Will it get ground loop problem ?? My English is bad so i can't understand clearly some documents about ground loop. i have 2 seperate board (a power amp based tda2003 and a ROG tonemender as preamp).They will use the same power supply .some thing like this picture http://i247.photobucket.com/albums/gg132/chipmapple/noobiedsn.png and this is schematic  http://i247.photobucket.com/albums/gg132/chipmapple/combineta.jpg Thanks!

Question by login721 7 years ago  |  last reply 6 years ago


Sounds with electronics

So here goes, I am trying to figure out how to make basic sound generating machines. Preferably generating a sound that can be modified with a potentiometer or something of the sort. The principle is simple, these will be for messing around, possibly, if the result is good, using in some random recordings of mine, so most of the machines will have a jack out plug. Anyhow I was wondering, what, in a circuit, actually makes sound, what is the base of all sound generating electronic devices (synth, analog stuff, beepers) what actually creates the wave, the current that is sent to the speakers? Have I just answered my own question by saying current? Is it just the electrical current, and putting random resistors, capacitators, potentiometers and stuff changes the sound that is generated? Any help is more than welcome! and if anything good comes of it, I'll post some sound clips!

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


Window A/C Making Bubbling Noise

We just got window air units for our house. Mine appears to work fine, yet it's making a strange bubbling/gurgling noise. It is tipped and draining. Any idea fellas?

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


electromagnet gauge makes buzzing noises?

Hi, i've been working on a project that involves reusing the electromagnetic needles commonly used in 90's era ford gauges. i can get it to work fine, but it seems to cause a buzzing noise as it is doing the work. there are three pins, ground, power, and signal. right now i just have it working off of 5v. when i have it going, and you hold the needle with your finger, you can feel it vibrating. i'm using an arduino nano, a npn transistor, and the gauge with a PWM output. do i just need to put a capacitor in? or how do i keep it from buzzing like it does? its not a loud buzz, but you'd notice it if you were in a quiet room.

Question by zack247 5 years ago  |  last reply 5 years ago


How to eliminate noise in FM transmitter? Answered

I had made a FM transmitter using IC NE555. When i power the circuit with 9V battery,the transmitted audio is clearly received in my radio receiver.The problem is the battery will soon drain out and also as the battery starts to drain the transmitted frequency changes without my knowledge.So as the battery voltage decreases the frequency is also changing.To eliminate this problem i used transformer powered source with 9V Regulator 7809.When i power the circuit with transformer the received audio signal on my radio receiver has so much of noise added.The audio quality which i transmitted is completely lost.Anyone Help me to resolve this problem.

Question by Rajkumar2506 2 years ago  |  last reply 2 years 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 5 months ago



How can I make a mechanical white-noise generator (sound conditioner)?

I would like to be able to make a white-noise generator like this one but I do not know how I would start.  If anybody has any suggestions, that would be fantastic.   If you do not know how to make a mechanical version but do know how to make an electronic one, that would still work, but mechanical would be preferred.  

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


Can any (Physicist) explain this laser-weirdness that I'm seeing? Answered

I've got some cheap-o red-lasers. Up close on surfaces I see what looks like old-fashioned monochrome TV static in miniature* (and red). Other people see it too, I think it's some kind of "Quantum-noise" but would like other opinions. L *I don't like looking at it - it reminds me of this.

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


how do you PROGRAM a batch file to make sound?

I think it is time we all knew how to do this long asked Question if someone posts a good batch i will test it and post my comments

Topic by Laserman595 9 years ago  |  last reply 6 years ago


Does anyone know how to make a dynamic normalizer? Answered

I need to make one for my parent's TV so that the commercials don't deafen them! A dynamic normalizer smooths the volume levels between commercials, songs, etc. so you don't have to change the volume.

Question by Argon27 9 years ago  |  last reply 9 years ago


Need help with change value of capacitor in tone control?

Hello .im making a TubeScreamer TS808 clone. In the original schematic they use 2 0.22uF Tantalum capacitors, but i don't have them, so i replace with 0.22uF Mylar capacitors.The result is when i turn the tone pot up, i get noise and loud hiss. Can i replace the 0.22uF Tantalum with 1uF Tantalum then change the value of some resistors to make the tone pot to work ?This is the original schematic and my modified version .I not tested it yet because i have to order parts to build it.Can you check it for me please! Im beginner and i dont know what part i have to replace if i replace 0.22uF capacitors with 1uF capacitors. Thanks! and sorry for my bad English! http://i247.photobucket.com/albums/gg132/chipmapple/tonechange.png

Question by login721 7 years ago