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Amplifier

How much maximum frequency and maximum power we can get from an amplifier. I mean what is the latest technology about amplifier.

Topic by m_uamir72001    |  last reply


Amplifier

Hi all,  I got two 3-way-speakers (8ohm) from my uncle, but I don't have an amplifier. I wanted to use these speakers as audio-monitors for my pc. Is it possible to make an (easy) amplifier-circuit for this use? And do I need one or two circuits (1 circuit-1 speaker / 1 circuit-2 speakers)? Thanks for helping me out! Arnout PS: Sorry if my english isn't that good - I'm from Belgium ;)

Topic by arnoutdejans    |  last reply


AMPLIFIER

Hi Im new to the site and it is awesome Can someone tell me where in a speaker /radio/walkman is the amplifier as I really want to make one for a project Can you tell me how can I salvage an amp to make an Altoids amp powered by a 9V Thanks a lot

Topic by B_qwerty    |  last reply


Amplifier?

Does anybody have any idea on how to design a headphone amp that will use the incoming sound voltage as a voltage supply? Possibly something like a joule thief to amp the power?

Question by blinkyblinky  


Amplifier mod

My old DVD/amplifier's DVD is broken so i thought i would convert it to a portable amplifier with some more inputs and stuff, anyone know where i might find blueprints or something so that i might easier figure out what's what? it's a Centrum Triton 110, (sucks, but then it doesn't matter if i mess with it) thanks

Topic by brunotheman    |  last reply


Amplifier Schematics? Answered

Can anybody get me a an amplifier schematic which can drive an 8" sub-woofer, two  8" Speakers and two tweeters? Actually my neighbor built an amplifier which is driving the same mentioned above . He resides in the nearby apartment still when he uses that amplifier i can feel the bass hear the treble and get the music to my ears sitting in my apartments. When i asked him the schematics he laughed at me and said that I am a noob of drove me out of his house, ARROGANT MAN. So please guys help me out in this regard. Thanks in Advance  

Question by adarshnarsaria    |  last reply


audio amplifier

HI, i have a bunch of transistors that i took out of an old cd stereo. I was wondering if anyone could help me figure out how to make an audio amp using one or two of them. I am really new to electronics and I haven't had much luck figuring it out on my own. The transistors I have are like little rectangles with a hole on top the kind that usually has a heat sink. some of the numbers on them are: B1344, B1342, k3053, D2012, i also have alot of capacitors ranging from .47 to 3300uf  these are 50 v and 30 v. I've tried other audio amp plans but im having trouble learning to read the schematics. Any help is appreciated ill make an instructable if i can figure it out.

Topic by tehaceofspades  


operational amplifier

I need someone that can tell me what an operational amplifier is. ive been googling these shenanigans for the better part of a day and cant seem to find anything other than technical diagrams. i just want to know, generally, what they do, what theyre used for, and where i would find one inside something in my house. im actually really pissed off right now, every page ive read tells me how important they are, and exactly how they work, and that they are used "in a wide variety of electronics", and that they have "nearly infinite uses" but no one seems to say "hey, here's where you might be able to find one, and here's what it will be doing" anyone got any answers to this. and so help me god, if i see any schematics posted with that little triangle that ive been staring at all day, i might set someones house on fire. (not mine, of course....but someones.....)

Topic by justin.jackson    |  last reply


Make DIY guitar amplifier with operational amplifiers? Answered

Hello I'm new, I'm not very good at electronics, I wanted to ask if I can make a small guitar amp with an operational amplifier! I have 2 UA741  DATASHEET = http://http://circuits.datasheetdir.com/37/NXP-UA741-pinout.jpg Online I've seen several projects, but used LM386 Exemple http://www.hobby-hour.com/electronics/lm386-200.gif is possible to create an amplifier, having 2 operational amplifiers UA741, or if there is a scheme that I can follow?? sorry if I did something wrong, but then again I'm new :) Thanks in advance!

Question by 1marco1    |  last reply


High Voltage Amplifier

I am trying to build a high voltage amplifier that will amplify an AC signal of approx. +-5V to a signal of approx +-100V.  I was looking into building a common-source amp using JFETs or a common-emitter amp using BJTs, but both seem to have an output waveform of 0V to +100V.  Is there a way to modify these amps to have an output waveform of -100V to +100V?   Also, if anyone has any better Ideas, please let me know. Mark

Topic by questionmark05  


how to make a amplifier?

i have SANSUI speaker having wires in barb wire form.... i need a power supply for that , for which i need a amplifier... help people.........

Question by ebyjose    |  last reply


Old Amplifier Challenge

Have a few old amplifiers around.  wondering what they can be combined to re-create. Best Re-purpose for 1 old amplifier... Thanks.

Topic by stephenblair    |  last reply


Help with amplifier 5.1

Good day, I had a samsung HT-40X home theater; however, the main unit died. So, I want to use the speaker and create a new audio system. The speakers spec are in the picture attached: http://downloadcenter.samsung.com/content/UM/201104/20110420105805326/20070309090035250_X40_SEA[1].pdf thanks.

Topic by scastro10    |  last reply


Simple audio amplifier?

Alrighty, I'm a n00b to this world but I'm really into it. I just bought a simple amplifier kit and put it together. It is a stereo amp but I am only getting output to one speaker. The only problem I can think of is how i rigged up the inputs. I took a 3.5mm jack and combined the ground from the left and right channels. Can you not do that? How do I fix this without running two individual mono channels? Thanks in advance!

Question by abroadhead    |  last reply


Microphone to speaker amplifiers

I want to make a microphone to 8 ohm speaker amplifier. I have tried using the lm386 op amp, however, the results were poor. What other IC could I use for this project? PD: It would also be of great help if any of you could send me a schematic along with the new IC since I am relatively new to electronics and still learning.

Topic by MrB12    |  last reply


Wireless headphones to amplifier Answered

I took apart some wireless headphones because I wanted to hook up the receiver to an amplifier using a 1/4" male jack but in confusion I tore off the speaker leads and grounds I managed to find the leads (marked SP1 and SP2 I only want one side though since its a mono plug) if the Part marked SP1 is the lead how do I find the ground?

Question by AusencioFlores    |  last reply


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    |  last reply


Broken bass amplifier

Hey, I have this 10w bass amplifier for home practice. Problem is that it gives no sound through the speaker, but it works fine through the headphone output. I have Checked the fuse, which was ok. I have also connected other speakers to the amplifier to see if it is the speaker itself that is broken, it seems like it is not. Seems like quite a curious problem, but can it be fixed? It sure would be nice to play without headphones again.

Topic by Henell    |  last reply


Passive amplifier with a transistor? Answered

It's possible to build a passive amplifier with a transistor? i have think about something that might work with a capacitor conecting the audio + to the transistor base. not sure if will do, and if it do i don,t know how much resistence is needed on the other end of the circuit. also i'm going to use 2 15 ohm speakers in series.

Question by matokage    |  last reply


Help : LM386N Amplifier

Hey guys. I'm new to these forms so please bear with me. I am very new to Instructables and this is my first project. I am currently working on THIS INSTRUCTABLE: https://www.instructables.com/id/Portable-Guitar-or-iPod-Amplifier-Amp-9v-LM3/?ALLSTEPS All I did is connected all the components as shown in the link. What I decided was to use an aux cable to connect my phone to input jack and connect my computer speakers to output jack. After connecting the 9v battery and connecting phone and speakers, all that happened was that led lighted up slightly and no sound from speakers. The moment I turned the volume of phone to maximum , LED started blinking still no sound. Plz help......:(  Any help would be greatly appreciated! Thank you :) Sorry for bad English...:(

Topic by Angads25    |  last reply


How powerful is this amplifier?

I bought this amplifier kit and I'd like to know what its capabilities are.   I was going to make a Chu Moy headphone amp but remember that I bought this a while ago and never did anything with it.  I'm going to guess that this isn't a top-notch amp, but I was wondering what I could get away with by using this.   Specs: music power output: 7W / 4ohm RMS output: 3.5W / 4ohm or 2W / 8ohm total harmonic distortion: 0.05% (1W / 1kHz) frequency response: 20Hz to 20kHz (-3dB) signal/noise ratio: 86dB (A weighted) input sensitivity: 40mV / 150Kohm overload and short-circuit protected supply voltage: 15V DC (8 to 18V DC possible) / 0.5A dimensions: 2.2 x 1.4" I'm assuming that this would be good enough for use as a headphone amp?  Would I be able to run this off a 9V battery?

Question by Justin Lam    |  last reply


Telephone amplifier schematic? Answered

Hi, I saw this cool thing on Make; an instrument that picks up remote signals and makes noise. This link shows the original product: http://www.moonmilk.com/2010/02/04/instrument-a-day-4-remote-interference/ I hear the product is a telephone amplifier with a coil as an input. I would like to know if there is a schematic for the amp that someone new to electronics could work on. Its really interesting stuff. Thanks

Question by phillyj    |  last reply


LM386 amplifier overheating? Answered

I built a simple LM386 based audio amplifier (schematic attached), but it appears to be over-amplifying, as it makes horrible squeaking noises and picks up a lot of interference. It also gets very hot in use, so I only switch it on for a few seconds at a time. I'm guessing this is because of the high amplification as I have a commercial amplifier that uses an LM386 and it does so without a heatsink, although unfortunately I can't reverse-engineer it and even if I did, my circuit would almost certainly have to be remade. I tried changing the potentiometer today from 1k to 10k and even 100k, but they didn't have much affect. What component(s) should I change to give ti less amplification, I only need about 2-6 times amplification, preferably adjustable but it doesn't matter too much.

Question by andy70707    |  last reply


audio amplifier transistor? Answered

I pulled what looked like a voltage regulator from a PSU, i guess as it turns out its not? apparently its a audio aplifier transistor, but what would that be doing in a PSU? if its any use, it was near a fan connector on a small sub-board... markings are: UTC 2SD880 (2 small, undistinguishable letters)RKOB (or 0B) i believe this is the datasheet, correct me if im wrong. http://search.alkon.net/cgi-bin/pdf.pl?pdfname=utc/2SD880_TO220.pdf

Question by zack247    |  last reply


Choosing the Right Amplifier?

Halo everyone again! This time around, I am planning to build a dedicated modern jukebox/ music kiosk. It will have touchscreen and all the good stuff. HOWEVER, I am not sure of the what amp to use for the speakers. I am planning to drive 6 coaxial speakers on this thing, 3 for each channel. The coaxes have a spec of 35watt continuous and 140watt peak. First off, will 6 of these be powerful enough to get a large living room thumping for parties, and if yes, what power amp would i need? I am planning ot buy the Sure Electronics amp boards, but ont know if i should get the 2 channel 100watt or invest in the 2 channel 300watt. These coaxes are 4ohms each, and i will probably hook them up in series. (unless there's a better way you guys can recommend). Would appreciate any and all help!

Question by SteamOh  


is this usable as a sond amplifier? Answered

I have this lm324 chip from a old stud finder, i searched for a datasheet and found this: http://www.national.com/ds/LM/LM124.pdf it says a op amp, so will it work as a audio amp? sorry. i have never used ics before, and i dont know how to really read datasheets much

Question by zack247    |  last reply


741 Signal amplifier Answered

How would I go about creating an amplifier using an LM741 to amplify a 0mv-400mv signal to a 0v-4v signal? All the circuits from google or textbooks don't work, or produce strange oscillations. The only way I can get it to work is in inverting mode, where I can get -4v-0v out, which isn't very useful. My specific application for this is for a digital thermometer. I intend to amplify the 0-400mv analogue signal from an LM35 linear temperature sensor, then somehow sample that without using loads of logic or transistors and convert it to decimal or binary, then drive a dual 7-segment display to show the temperature. I have a prototype made using 20 comparators and 10 xor gates, and countless diodes, so if anyone could advise me on an easier way to do that, that would be great. And no PICs/AVRs, I know how to use them and have programmers, but I prefer to do "real" electronics using CMOS chips.

Question by andy70707    |  last reply


Matching speakers to amplifier

I have purchased 2 Maxamp20 amplifiers (http://store.accusafe.nl/modules/versterkers/maxamp20-met-3-5mm-connector) and i am trying to match speakers to them, i've searched audio forums for information (that i mostly don't understand) and tried asking questions (that have been mostly ignored) and i think i've found appropriate speakers but i want to get a second opinion before i purchase stuff i might not be able to return. i don't have the space for and can't afford the weight requirements of a large enclosure but i want fairly high volume and wide dispersion so im looking at getting 2 of these PA horns (http://www.specotech.com/index.php/products/audio/item/542-spc40rp) to mount on top of a shallow down firing enclosure for 2 of these subs (http://store.accusafe.nl/onderdelen/luidsprekers/subwoofer/dayton-audio-sd215a-88-8-dvc-subwoofer-speaker). i know the subs work with that amplifier because they are used in Boominators (http://www.diyaudio.com/forums/class-d/104402-boominator-another-stab-ultimate-party-machine.html) but i have no idea about the horns. also assuming this setup is okay do i need some kind of filter or crossover (not sure of the difference) to split the sound safely between the midrange and the sub speakers?

Topic by ambientvoid    |  last reply


Operational Amplifier not working? Answered

Hello, I'm trying to use the KA324 IC (which consists of four opamps) for amplifying an audio signal. I've tried almost every schematic from this website: http://sound.westhost.com/dwopa.htm and also from lots of other websites, but none of them work. If the output volume is Really low, the sound is pretty good, but very quiet. When I turn up the volume, the sound is really bad, I almost can't recognise the song I'm playing. The output volume is also not that really high. If I keep increasing the input voltage, the output stops increasing after a while. It's not really 'loud' at that moment too. I've connected the IC to 12V DC (between the two middle pins). The + input goes to the ground connection, the - input goes to my POT voltage divider of the input voltage. The output pin goes straight to the speaker. I also added a 100kOhm resistor between output and - input. Without that resistor, I hear nothing at all but I think that's normal. I've also tried the three other op-amps from that IC but no luck. Is this opamp just not ment for audio amplification? or am I doing something wrong? Greetings, Electorials

Question by DELETED_Electorials    |  last reply


Audio amplifier grounding

How to make proper grounding in audio amplifier circuit? How to have separate signal and power grounds?

Question by Amit222    |  last reply


Daisy Chain Amplifiers?

I have a couple amplifier chips, and i would like to know how i could daisy chain them (connect them together for more power)i am using STMicro TDA7266s pdf i have tried putting amplifier chip in series with each other (not the outputs, but all the pins)help?

Topic by Sandisk1duo    |  last reply


Simple guitar amplifier?

Just curios, is it possible to build a (very) simple guitar amplifier out of  2x2N2222, a 8 Ohm speaker, a battery and some resistors? Note: I have a guitar cable with another and cut off.

Question by MaracKoMarac    |  last reply


differential amplifier tech

Hello, I'm following a circuit diagram for a current monitor that uses an op-amp as a differential amplifier. Connected to V- and V+ on the amp are the positive and negative leads of a 10mH Inductor that senses the current (as much as 9A) passing through an insulated positive line. The gain on the op amp, I'm told, is 220. If I calculated this correctly then at 9 amps in the insulated wire, 0.09V should be produced by the inductor and there upon entering the V+ lead and -0.09V in the V- lead for a differential of 0.18V which gets amplified to 39.6V. However the voltage source that powers the op amp is only 9V. So question # 1: Did I break down the math correctly? question #2: What happens to the excess voltage from the gain? I am getting all of my op amp information from wikipedia. I've never used an op amp successfully before.

Topic by watchingmachine    |  last reply


Tube amplifier schematic

Does anyone have a schematic for a stereo tube amplifier, I just acquired a large quantity of tubes, a tube tester and some other assorted electronics from my grandfather. Ive always wanted to make a nice tube amp, now all i need is direction. It will be another 2 weeks or so before I can actually pick them up and start testing them so I was just trying to find some schematics to get me in the right direction. I figure this may even make a nice first instructable as long as im not completely lost in the schematic. Thanks smoke

Topic by smoke    |  last reply


Will this amplifier schematic work?

Hello! I am currently designing an amplifier for a speaker. I wanted it to be a simple circuit--but powerful. So, I came up with the schematic below. the ports labeled SV2 are the output for the speakers. SV1 is the DC power source. SJ-43515RS-SMT-TR is the auxillary port. all of the resistors are 1K ohm. the capacitors are 40V 100 uF. I would build it on a breadboard, but my school has shut down temporarily from corona virus and i cannot get access to our maker space. I would do it at home but have used up all of my resistors and capacitors. Thanks!

Question by Cheesey125    |  last reply


Amplifying speakers and IC's

I have come to the instructables forum today in search for knowledge. So I have been working on a simple speaker system for my ipod shuffle, the speaker I used is quite old, but was the only one I found laying around. When I plug my ipod into the circuit everything works fine the only problem is that it is barely audible. Is there a way to amplify the sound so I can actually hear it without having to stick my ear right next to it? Pictures of my work so far will be provided. Oh also identifying the IC's included in the gallery would be of utmost help. Thanks in advance.

Topic by nahum45    |  last reply


Lm 324 amplifier?

Hello i am trying to build a Lm324 Stereo preamp to go into my 100w tube amp, and i cannot find any schematics on 324's. My idea was to have each channel occupy its own side of the chip, and having a switch to switch between 1 and 2 amp stages. please help thank you.

Question by ski4jesus    |  last reply



ideas for homemade audio amplifier?

I was interested in pursuing the Bike Stereo instructable but I would rather not buy the $30 amp. What are the general ideas behind making decent-quality amplifiers for speakers? I have limited theoretical/practical experience with op-amps and I'm struggling to apply these ideas to a stereo system. Any thoughts?

Topic by post.haste    |  last reply


Converting a stereo system into an amplifier

Right so I have a Ministry of Sound, MT2, Power Tower, HI FI System. It has two external speakers which are fairly crap and a decent sub woofer. I want to take out the sound board and the screen interface, des guard the tape and CD player and remount them into a new housing. Currently the output sockets are 3.5mm headphone sockets which the speakers which came with it originally plugged into. However I have much better quality bookshelf speakers which I want to hook up. Is it possible to hook up my new speakers effectively turning e self contained stereo system into an amplifier?

Topic by Lopan    |  last reply


heavier duty pocket amplifier

I was in need of a pocket sized powered amplifier, so I made this:https://www.instructables.com/id/Simple-Powered-Pocket-Amplifier/However, I need to run larger speakers off of it, 6.5" woofers, and I need to get decent sound out of it. When I ran more power through my pocket amp (6v. battery pack rather than 3v.) I fried the circuit and had to make a new one. Any suggestions for a pocket sized, powered amplifier that can power said speakers? the amp and battery pack must be concealable in a suit.

Topic by imanalchemist    |  last reply


About audio amplifier boards? Answered

I've brought TDA2030 amp board for stereo system(pictures attached). I can't identify audio input terminals. Experts please help me! 

Question by chrisjlionel    |  last reply


How to Build an amplifier for cheap?

I am a 17 year old teen with little pocket money and a beginner. I want to make an amplifier which can amplify an 8 inch subwoofer, two 8 inch speakers and 2 tweeters.

Question by adarshnarsaria    |  last reply


Hardwire IR Extension to amplifier

Hello Instructables. This is my first post and would like to begin by saluting the work you all do, I love receiving the email at work showing the weeks projects. My problem, that I hope somebody has a solution to is this... I am building a false wall to house my fish tank and TV, ps3 etc however my amplifier is too large and does not fit into my project. The only way round this is to house my amplifier in the loft. In the wall I want to place the IR remote control Sensor. I don't really want to pay out for those 'eye's' you can buy online (nor do i think they would be compatible with my model of amplifier) so was wondering if i could just use some ordinary electrical cable to extend the sensor? I was worried cable might not allow this as it would probably add extra resistance to the circuit. Does anybody have a solution or suggestion that involves spending little or no money please? Thank you very much! Frankie

Topic by fhoward    |  last reply


Help with the LM1875 amplifier chip?? Answered

 do i need a 4A supply, or is that just the most it can handle? ie can i use a 18V 1.4A transformer with it? i realize it wont be working the chip's potential, but that's not a big deal to me i just want it to work.

Question by tigerdog330    |  last reply


Need help with making an amplifier

First of all I am only considering to make this amplifier I have not gone out and brought any parts yet although I have had a look around. If all goes well I will post an instructable of all the stages required to construct the amplifier.  I am looking to make an amplifier to be used with my computer and various other devices. This is the amplifier schematics I have had my eyes on.. I am new to all of this really but Ive been trying hard and eager to get this working.  Amplifier http://www.circuitstoday.com/2-x-60-w-audio-amplifier-circuit  I have designed this on Eagle PCB, need to double check the connections. Would be useful for some info on the width of the tracks as this was the element I was most unsure about. I am new to Eagle PCB so im not familiar with standard conventions and tricks.  Pre-Amp http://www.circuitstoday.com/passive-tone-control-circuit I have designed this on Eagle PCB, on a separate board again need to double check the connections.  Power supply  I Have got a basic 35v+/- dc supply schematic, it is based on a toroidal transformer, will probably need a inrush current circuit doing later. I have added the power supply components on the same board as the main amplification stage.  Frequency Crossover I have an idea of what I want to use, I was think a 2 way 2nd order Linkwitz Riley filter because I dont want some of the areas of the midrange to be lost, from what Ive seen on graphs, the low pass and high pass dip significantly closer to the crossover frequency. Ive selected some drivers that I liked. The tweeter has an impedance of 8ohms and a frequency response from 1.6khz to 20khz. The woofer has an impedance of 8ohms and a frequency response from 30hz to 4hkz. I read somewhere that it was ideal to crossover exactly in between the two i.e 2.8khz, let me know if you think otherwise.  Also Ive read up a bit on L-pads, would it be suitable/ worthwhile in this application? is it necessary to have the impedance seen by the amplifier constant, if so where it be? Ive looked up the components on a website supplying crossover and audio devices, there are many types of inductors and capacitors I am not entirely sure which type would be most suitable.  If somebody could help me out in designing the amplifier and understanding how all the circuits could come together I would really appreciate it. I  would definitely do an instructable of the construction of all the stages of this amplifier. Thanks in advance. 

Topic by Jarez Patel    |  last reply


wiring my subwoofers to amplifier?

4 Ω x 2ok i have a  JBL amplifier    and a pair of pioneer dual coil subwoofer with impedence 4 Ω x 2  ( http://www.pioneerelectronics.com/PUSA/Car/Subwoofers/Champion+Series+PRO/TS-W3002D2|D4 ) i'm not sure if it will work just fine if i connect the 2 subs to the amp at 2ohms each, because i wired it to make a 8ohm impedence on each sub and works just fini!!! but  i'm not satisfied with the output power will it work fine if i connect both subs at 2ohms impedance(set the coils in parallel on each sub) on each sub to the amplifier???? don't worry about the power delivery, i have a 2X10farad capacitors, and a 55AH battery installed in the car

Question by ARJOON  


need details on audio amplifier

I want to design and implementation an audio amplifier, and i was needing your help. thanks

Question by mukundwa    |  last reply


Connect two audio amplifier ?

Hi, I would like to make a very powerful 80w bluetooth speaker, but the only great audio amplifier that I found has only two output for speakers. So I was wondering if it will be possible to buy two and connect the first audio amplifier to the second one ?  Cheers, PS : here is the audio amplifier and the speakers that I will use :  http://www.ebay.fr/itm/232053348992 http://www.ebay.fr/itm/272387157947

Question by EgeK2    |  last reply


Mic amplifier for ambient sound?

I need a way to pick up distant sound at the mic. I hear output only when i talk too close to mic

Question by Ejay11    |  last reply