Re: Cheap USB powered condenser microphone. Need advice on design.
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Here's a version of a USB powered Alice.? Comments welcome since my ability to make errors is well known.
On Fri, Nov 17, 2023 at 8:30?AM Timothy Aguana < lolnetian@...> wrote: Hello, I've drafted up a DIY design that I think could work to drive an electret capsule like the TSB-2555B through the use of a DC-DC converter () to derive a stepped up voltage from the 5V supply rail of a .? The generated voltage of the microphone is fed into an amplification circuit from the? Presented below is the proposed amplification scheme:  Similar to the aforementioned OPA-Alice circuit, the amplifier to be used is planned to be the OPA1642. The USB soundcard to be integrated to the design utilizes a CM108 IC with an input range of 2.88 V pk-to-pk and a default input signal gain stage of 20dB (gain of 10). I am relatively new to the design of microphone circuitry and this design is heavily inspired the by videos and instructables from DIY Perkz and DJJules.? I would like to ask for advice regarding the design choices made and the validity/viability of the proposed design.
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