MEMS Microphone Interface / Arduino / Clapper Switch

This video will describe the workings of a MEMS microphone and a companion amplifier circuit. A clapper switch using an Arduino Nano is built demonstrating the operation of the circuit.

[@ImnotChuck.]

Another excellent explanation. Thanks.

[@linuxguy1199]

Last time I seen someone use FORTH was for programming RedPower computers in Minecraft

[@sayantanmaiti2513]

I think the breakout board should include that opamp section too using smd components

[@0033mer]

They are available but cost a bit more. www.bc-robotics.com/shop/sparkfun-mems-microphone-breakout-inmp401/

[@RobertShaverOfAustin]

First thing I thought of was beam forming with multiple MEMS mics so I Googled it. Lots of info out there. Here's a PDF which has an interesting overview of the subject: www.mouser.com/pdfDocs/Microphone-Array-Beamforming-2.pdf

[@0033mer]

MEMS mic array boards are available where you can build a sound compass. www.seeedstudio.com/Sipeed-6-1-Microphone-Array-for-Dock-Go-Bit-p-2875.html

[@Torchl146]

Well thats a decent usefull comment !

[@denishnatiuk921]

Very well done

[@0033mer]

Thanks for the visit

[@mohammedshalash7842]

Thanks for the video, are taking it further and read the DPM stream to arduino and send it to another arduino for wireless audio communication (as wireless microphone system)? THANKS

[@jayp5269]

can we use this mems digital microphone with arduino to stream audio ? for e.g. if I want to send signals continuously to Raspi and read that thru python script ?

[@VuNguyen-ws6nt]

Can we use this MEMS microphone to measure sound level as high as 85dbm?

[@Torchl146]

Or you just buy a single mems mikrophon on mouser for about 1€ thats way cheaper and not really that much more work

[@theengineer9910]

Flash Forth? Never heard of it looks like hardware description like verilog

[@lava08]

What kind of capacitor you are using in this circuit?

[@landonivy675]

Thank you for the video but I'm curious why the op amp circuit is necessary? The datasheet ( media.digikey.com/pdf/Data%20Sheets/Adafruit%20PDFs/2716_Web.pdf ) provided by Adafruit recommends just plugging the output directly into the microcontroller's analog input pin. They mention that the un-amplified microphone outputs 0.1 Vpp when talking near it. For microcontrollers with 12 bit ADCs, you could get 0.1/(3.3/(2^12))≈124 samples over that 0.1 Vpp range which seems sufficient to me. Am I missing something?

[@0033mer]

The output of the op-amp is fed into the GPIO "digital" input of the Nano not the ADC so it is expecting a digital 5 volt logic swing.

[@landonivy675]

Oh I see now, sorry. So if you were just feeding to an analog input then you probably wouldn’t need the op amp? I’m trying to record audio with an Arduino Portenta H7 and was interested in this microphone.