GENERAL DESCRIPTION. □ PACKAGE OUTLINE. The NJM/ integrated circuit is a dual high-gain operational amplifier internally. D – Download as PDF File .pdf), Text File .txt) or read online. D are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for D.
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I have been looking for a good stereo amplifier circuit diagram for a long time. I am not a HiFi geek, I just wanted to build a simple stereo amplifier that could drive some speakers for my desktop computer. All the schematic diagrams that I could find seemed to involve lots of hard-to-find components or you had to use it together with a pre-amplifier or some other amplifier stage.
It was always something that made me hesitate. But recently I found this awesome little chip called TEA! You only need a few capacitors to make a decent stereo amplifier out of it. It is so simple to build that I put it together on a strip board in just a few hours.
The amplifier circuit diagram shows a 2. You can also make a 5W mono amplifier out of it.
Check out the TEA datasheet for more information on that. On the input side, you should use a dual potentiometer. A dual potmeter allows you to connect both left and right channel on one potentiometer. This amplifier is great to use together with some speakers to get sound datawheet your desktop computer.
I am thinking of putting one in my kitchen and in my bathroom also. This board datashheet made to comply with the design rules of Seeed Studio May I want more people to build better and cooler projects. Everyone can improve even if they are complete beginners or have built many circuits from before. If you love building things with electronics or would love tocheck out Ohmify. Hello Oyvind, Thanks for this useful post. Can u suggest me some solution to get get the rid of this noise. If the input signal is too high, you will get clipping on the output.
This will make the sound noisy. So first, check if you have the noise problem when the volume is turned down: Thanks for your quick reply, I tried your suggested solution and yes the noise is still present at lower volumes.
And one more thingi think i should add, I am using USB power supply. As I 44558d to make it completely portable. And higher Watt-rating of the speaker just means it can handle more power.
The IC is probably running out of power. Buy a tablet power supply 5V 2A, for fast charging and check current consumption with a multimeter. Or buy a 9V rechargeable battery raising the voltage to get the same power from the supply will give you less current consumption, which is nice running on batteries.
Check the input stage for bad solder joints can act as diodes hence radio noise. Try a aluminum foil shield to check for external signals that show up as noise. Check for oscillations in your component layout etc. Is there any shop have a complete part list for this stereo amplifier? Hey, thanks for the great schematic, I was actually looking to make an audio amp and this one looks awesome! Should I just use a mono amplifier with similar specs as datasueet tea? Check out page 4 on the datasheet.
I was wondering why that was there, but I just assumed it was a separate application entirely because of the name! Pls oyvind,help me here also i will download your book sooner by grace can you provide me with a schematic of 4 stage transistor 2. If you have access to an oscilliscope http: I challenge you to figure it out from the datasheet: I mean to ask what is current consumption of this circuit?
You can find this info in the ddatasheet of the TEA chip: Not sure what pin that is, but check the datasheet and you will find info on all pins: Daatsheet the datasheet of your potentiometer to find out the pin configuration, then match that with the diagram above.
For example from Jameco: Here are some more suggestions: What is the diagram software that you used to create these circuit diagrams?
No need to simulate. Oyvind, I manage to make my amp work but the problem i am facing now is the output volume is too low ,can you please help me? I use 50v for all polarized capacitors and v for non-polarized ,20k potentiometer and powered by 3v rechargeable battery.
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If the sound is very low, you can try to increase the volume of your input device. You can also combine capacitors in datsheet or series to get other values: Hi, this could be because there are only inputs on one channel. Try switching the inputs and see if this gives you an output on the other channel. I have purchased W sterio amplifier with USB and mic-2 kit i want to understand bass treble and volume wiring in 6-pin pot.
I have just finished asembling the bridge version and I am impressed of the quality and the power datasheeh this IC! The design I created was double-sided. I use to make amplifiers from the internet and it makes little hmmm noise when the volume is attached. Please may know what could the course. Hi, The incoming signal could be too high.
The amplification could be too high. There could be noise in the incoming signal. So you want more bass? With this circuit my best guess would be datzsheet add a low-pass filter on the input side. Hey, how can I add the input to the speaker?
Also, can you help me with the Potentiometer? Hi, The input does no go to the speaker. The output goes to the speaker.
D Datasheet, JRC NJMD PDF –
You can read about the potentiometer here: For filtering or to avoid oscillations. You might be able to skip some of them, depending on your power source. Is the circuit is able to withstand the power supply? If you have the correct DC voltage in, the circuit is fine as long as the power supply can prove enough current.
Thanks for dagasheet website. It is very helpful. I want to try making a portable audio amplify for devices like cellphones, mp3 player, etc.
Any clue Oyvind would be really appreciated. Well, I guess this article is a start. Here you build the amplifier. But if you want more power, check the datasheet for how to connect the outputs in mono-setting. I need to boost a signal sixfold before I divide it by 6 to send to 6 different destinations.
Can this be done with an LM? Also, I do not seem to be able to make the LM specs give me hints on how to do it.
The amplification part should be possible yes. Check out page 5 in the datasheet for circuit examples: For splitting the signal, you can use resistors for datasjeet splitting.
Hello, I am facing a strange problem with this circuit. I am powering this circuit 12v just so you know. When I was tinkering with the circuit, I found that removing the uF capacitor connected to non working speaker and shorting the wire, the speaker starts receiving sound but now the output is way too noisy. I tried replacing the capacitor but nothing happened. Do you have any idea? Thanks sir you are really doing, but I plead your indulgence to ask you of how to build a W stereo power amplifier.
You can find one here: Hy guys my problem is i dont know where to buy those printed circuit boards i live at durban. This is a really cool thing!
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I am new to electronics so I have a stupid question. How can I connect the two inputs to my laptop if I build this 4558dd a breadboard? Hey Kirk, You need to use an audio mini jack to plug into your laptop.