Tagged Questions
1
vote
1answer
97 views
Problem with microphone powering up a comparator circuit
The circuit below is supposed to turn on a LED when the microphone input reaches these levels:
1V, 3V, 5V, 7V.
What this circuit does in real life is when we turn on the power, all 4 LEDs light up.
...
4
votes
2answers
772 views
How to connect mic on arduino, with opamp?
I'm trying to connect a contact mic to an arduino.
My knowledge in electronics is sparse, so please bear with me.
I got a couple of lm833n audio dual opamps, which I'd like to put to use. I'm still ...
2
votes
1answer
168 views
Circuit review: Impedance bridging for microphones
I have a pair of specialist condenser mics with a nominal output impedance of 3.6k Ohm that I would like to interface with mic preamps with nominal input impedance of 2.2k Ohm. Does this impedance ...
2
votes
1answer
715 views
Mic preamp: Inverting or non-inverting op-amp configuration?
What are the relative merits of using inverting/non-inverting op-amp configurations for a microphone preamp? While searching for microphone preamp schematics based on op-amps, I have found both ...
0
votes
3answers
414 views
Using Mic from 10 feet away for voice recognition
I'm trying to use a mic from 10 feet away.
Background: for my senior project I would like to talk to a computer to run scripts, but I want to talk to the mic throughout the house. So I need to be ...
5
votes
3answers
7k views
How to make a clean amplified microphone analog to digital conversion?
I've asked a couple of questions relating to this project the past couple of days, but I cant seem to put it all together.
I hooked up an electret mic into an opamp and gave output to my arduino ...
3
votes
4answers
3k views
Why is microphone + opAmp + Arduino circuit not working?
I followed the mic + op-Amp part of this schematic exactly using an Lm386 chip:
https://randomskk.net/projects/lightstrip/schematic.pdf
and sent the output from the op-amp into a pin on an Arduino ...
