Electronics > Beginners

Pre-amp to connect microphone to speakers

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Audioguru:
I think the electret mic preamp should be like this:

spec:
Hi AG,

Fancy seeing you in these parts. :)

Nice mods- I didn't do any optimization on that circuit, so it was really an outline.

I would suggest changing the opamp to a TSX711 or OPA191 as part of the improvements. As you say the OPA134 is not all that happy with a low Vcc.

Audioguru:
Hi again, Spec.
I goofed on making changes to the schematic, this one is best:

SoundFan:
Hello
Thanks for all your great replies !
I'm sorry that I didn't reply until now, I've been quite busy these days with my studies and meetings as well as some research project.
I will try to test out these circuits and use 9V instead of 5, maybe this will finally make my project work.

spec:

--- Quote from: Audioguru on November 25, 2018, 03:49:01 pm ---Hi again, Spec.
I goofed on making changes to the schematic, this one is best:

--- End quote ---
:) I goof all the time

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