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DiAna, a software Distortion Analyzer
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Old 24th November 2019, 08:51 PM   #941
phofman is offline phofman  Czech Republic
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Join Date: Apr 2005
Location: Pilsen
Thanks for the correction, sorry for the misinformation.

That MCU would not sample like an audio ADC, no need for the purpose. Precise value is already sampled by the soundcard. If an approximate value were needed on the PC side, outside of the analyzer, a few samples a second behind some AC/DC to hold peaks (somehow already present in the device for the existing MCU) should be easily attainable.

But again, the ADC is not point of this. I just wanted to suggest one way towards enhancing existing devices with simple remote interface without complicated modifying their firmware, if possible.
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Old 24th November 2019, 09:39 PM   #942
thumb is online now thumb  Europe
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DiAna, a software Distortion Analyzer
I like your approach @phofman
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Old 25th November 2019, 06:18 AM   #943
mkc is offline mkc  Denmark
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Join Date: Jun 2002
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DiAna, a software Distortion Analyzer
Sorry for continuing being off-topic in Edmonds thread.

However, I would like to point out that instead of using the ATMega processor based boards a STM32 based board would be a better solution. STM32F103 based boards are also dirt cheap on Aliexpress. The board often referred to as the Blue-pill board would be a candidate and are also supported by the Arduino framework. So it shouldn't be that different from a programming point of view.

Although not as cheap there also is this board from ST's Nucleo series. It has an STM32L432 which also has USB connectivity, but also hardware floating point module if needed. NUCLEO-L432KC STMicroelectronics | Mouser Europe

Back to normal again.

Mogens
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