Context: I have taken on a little side hobby project to learn by making a circuit which should be able to only go high when it sense an acoustic signal with a frequency around 40kHz. To do this I will be connecting a microphone to a band pass filter and then hook it into an arduino which I am somehow going to programme to indicate when this happens:
Microphone > Band pass filter > High voltage when 40k+ goes to Arduino to log this information.
For this whole project I will be using a battery so I will have 0 to +5 volts and so I cannot use -5v in any op amps.
For my band pass filter I have 2 options I can go really simple with something like a passive band pass filter:
Or I can go further and make an active bandpass filter: [ Although I do not understand how it works fully, I know that it is a higher order and is more precise and accurate :
The issue with this is the fact that the ADA4062-2 Op amp is extremely small. I would not be able to solder it or use it in a breadboard. Is there a way to find an op amp that could do this to avoid this issue?
For the Microphone/ultrasonic sensor I will be using this:
1) Will using the simple passive band pass filter be enough. 2) Is there a way to find DIL integrated circuits to replace small surface mount ones? 3) In regards to the ultrasonic sensor can I just connect this to the band pass filter directly?
I am sorry for my lack of experience. I would appreciate any help.
Higher order circuit designed using: https://www.analog.com/designtools/en/filterwizard/