MAX4466 Microphone & Preamp Module (First look and Test)
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- Опубликовано: 11 окт 2019
- In a recent postbag video I recieved this MAX4466 microphone and opamp module. In this video I hook it up to an oscilloscope and an Arduino Uno and run a simple sketch to emulate a clapper circuit.
GY MAX4466 module on AliExpress:
s.click.aliexpress.com/e/_9izrYL
Get in touch with me:
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Discord: / discord
Twitter: / dustinwattsnl
Facebook: / dustin.watts.utrecht
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Thank you very much for this tutorial. I was stuck on a projet and here we go again to finish it.
You are welcome! You are also welcome to share you project. Here. Or on my discord: discord.gg/RE3XevS I am a pretty curious guy 😉
Great job, thank you.
Thank you James!
Do you think it can reliably output multiple smaller ranges between 1V and 5V? Say if I wanted an event between 0V and 1V (flash red led) and then between 1V and 2V (flash blue led instead) etc? I ask because the noise seems to favor less nuanced ranges.
You mean something like a peak detector? If you use a microcontroller like in this video, this would be quite easy to code.
Hi, Is it possible to desolder the microphone and connect line-out form the computer? Should I add something in between the two ?
Hi! The MAX4466 is a microphone preamplifier. It amplifies the signal from the microphone to "line level". The signal out of your computer is already line level. So what you have to do to the signal really depends on what you want to do with the signal. Do you want it to drive speakers? Or do you want to digitally process it in a microcontroller? You can join my Discord server to chat about this if you like. discord.gg/RE3XevS
Hi
Can i use use two max4466 modules and connect together to 5v pin arduino ?
They will opreate?
Yeah I think you'll be fine!
Hello, I am working on a rescue robot which should recognises human voice or some spesific words like 'HELP, I'M HERE'. Except voice recognition module and arduino nano 33 BLE, which sensor or module can you advice?
Hi! I would use a audio codec board with I2S mic. This will give more better audio for post processing.
@@DustinWattsThank you.
Hi, What are the other sensor options for recoding high quality audio recording with minimal background noise. I though of using MAX4466 for a insect sound detection project.. will this be a feasible option?
I would opt for a ADC and a microcontroller. Less THD en much better audio quality!
I'd be interested to see how this works with 3.3v
hi, do you know why the output is so noisy, and is there anything we can do to eliminate the noise?
No. Electret microphones are noisy. On computers you can use progaram denoiser, but it not good for sound quality.
@@user-nq4cl9tn5p i bought this module and tested it with oscilloscope and it appears way less noisy and much better. I think in this video it is so noisy because it was faulty probably because of that capacitor that seemed broken.
Good question. There may be three reasons: 1. the power supply used is bad. A battery may be a better choice or a dedicated adaptor. 2. the microphone used is bad. You can buy a lavalier mic to replace it or any better electret mic. 3. the preamp curcuit is bad but this is unlikely as it was designed by a professional. Thinking too much about this is waste of time as we have many alternative choices in the market.
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Hello, I have a car stereo. Can I use this module as an car microphone? My car teyb has three microphone inputs, these are (+5V ) (GND) and (SIGNAL) . Can I connect directly? Thanks already for your help. I wish you good work.
Well I really can't answer that. Depends on what your car expects as a "microphone". And what it will be used for. Speech? And I also don't know what teyb means. I need more info/specs.
But what I can say, as a microphone for speech, this is not the microphone for you. It is very noisy and the quality is too bad to be used as a microphone. I would classify it as a sound detection device. For example in the circuit I showed in the video it works great. Also for similar applications. But not as a microphone.
Good day. Do you know how to covert the sound produced into decibels?
Hi! Depends on what dB you mean. If you mean a audible sound (db SPL), you would need a DAC (Digital to Analog Coverter) or a circuit simulating one, and a speaker.
Or if you directly hook this up to a speaker you need some form of amplification. I can't remember what the peak-peak voltage was, but this can directly drive a speaker only if would probably be very soft as there is no amplification.
@@DustinWatts I mean I want to evaluate and monitor sound that is produced indoors, and I want to use the microphone (in my case, MAX 9814) to capture and evaluate noise. I hope what I said makes sense, haha. Hoping for your speedy reply, thank you
@@josephcampugan2439 Well it makes kinda sense. What do you mean by evaluate? From you previous post I think you mean hearing it? It then depends on how loud the incoming sound is that you want to evaluate in comparison to the noise of the microphone itself.
@@DustinWatts I mean this is what I want to happen:
1st is that the microphone receives noise from its environment.
2nd is to convert that noise into decibel values using an arduino
I'm trying to make an indoor noise monitoring system where it measures how loud the noise within that area. I'm going to use the noise values on dB to launch certain commands depending on how loud the noise is.
I really appreciate the replies. Thank you once again
@@josephcampugan2439 Ok. Well that is certainly possible. You can read the value of the microphone and compare that to a threshold value and if the incoming sound is higher then the threshold, do something. You can stay away from using any dB scale at all, just read voltage levels.
Hey can somebody help me pls. Do I need to screw the pot cw or ccw for more sensitivity? Can I overscrew it? Thanks in advance
Yes! You can definitely overscrew it, those tiny post are pretty fragile, so be careful! If you break it, the output of the pot in uncertain.
I have played white this module exactly 1 time, so I can't tell you from experience. But....
This listing on Ali shows the schematic of the module: nl.aliexpress.com/item/32843099206.html Looking at it, turning the pot clockwise should increase the ratio of the non-inverting opamp and thus should increase the output. This has nothing to do with the "sensitivity" of the microphone though. It just increases the gain of the MAX4466. According to that schematic the gain is: 1+(VR1+R7)/R5. And because in the schematic the symbol is flipped, turning it clockwise (towards pin 3) increase the value of VR1. Again, you should get a higher signal on "OUT" for your ADC (or whatever). Which you can say as being more sensitive, but it actually just the amplification you are increasing.
Hope this helps!
@@DustinWatts thanks Sir! This definitely helped, on 2 of 3. One of them already came overscrewed. I don’t get it, why this step isn’t part of almost every data sheet, as it can be easily overscrewed. The end limiter (doesn’t really deserve that name) is just a slight resistance you feel while screwing.
Anyhow the two others work, slightly better than the KY-038 I used before but nonetheless you need to play that sound really loud and/or you need to play it almost directly in front of the microphone. I assume it’s due to the work principle of these tiny microphone.
@@ACID2BREAKS Yeah those microphones are not the best. Better small microphones especially MEMS microphones are a lot better. And those are actually useful enough to record audio with a lot less noise.
@@DustinWatts I also stumbled over mems microphones. Seem to be very powerful especially in terms of resilience against noise.
You mean something like the INMP441?
Or what would you propose to sample a sound of ~80dbA and expected max frequency of about 2kHz all recorded in outside environment?
@@ACID2BREAKS I have that module here, but haven't tested it. But the specs are pretty decent. But remember the module is only 3.3V for VCC and also for the I2S pins!
I ordered a few of these and noticed that the traces for the pot were actually all connected from input to the wiper, which I think would make the pot useless as the signal will always take the path of least resistance. I cut the trace and it seemed to work, I used an external 5K pot, but getting these things to work has been tough for me. It's possible I just got a bad lot.
I'm still working on them, and hopefully I'll have a working solution soon. But it might be worth checking the traces of the pot, you may find what I found.
Anyone who uses dark mode is definitely a pro.
That is why dark mode was invented. To separate us from the mortals! :)
Its a piece of shit. In the max 4466's datasheet its a quality preamp..