AUDIO section (3.5 mm jack, codec, mic, speakers) #19

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1. V3lectronics

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   on Aug 13, 2025
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3. V3lectronics commented on Aug 23, 2025

   

   V3lectronics

   on Aug 23, 2025

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   I found a super useful doc which I plan to now use to push forward this part of the schematic.

   TI TLV320AIC3204EVM-K evaluation board schematic and layout:
   https://www.ti.com/lit/ug/slau266a/slau266a.pdf?ts=1755965626065&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FTLV320AIC3204EVM-K

   very good coded datasheet:
   https://www.ti.com/lit/ds/symlink/tlv320aic3204.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1755895813587&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Ftlv320aic3204
4. V3lectronics commented on Aug 25, 2025

   

   V3lectronics

   on Aug 25, 2025

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   Audio update:

   • I connected clock and data on the coded
   • I connected the microphone (double check would be nice).
   • Next stream probably will add the remaining caps and resistors for the mic.
   • I've taken the decision to use only one mic for now, it will record on the left channel (simplicity and prototype workload offloading).
5. V3lectronics

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   on Aug 28, 2025
6. V3lectronics

   added this to the Complete audio schematic milestone on Sep 1, 2025
7. V3lectronics commented on Sep 2, 2025

   

   V3lectronics

   on Sep 2, 2025

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   Update:

   • connected the mic
   • made it so that all capacitors with the 0603 package use the same footprint and 3D model
8. V3lectronics

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9. V3lectronics

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10. V3lectronics commented on Mar 14, 2026

    

    V3lectronics

    on Mar 14, 2026

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    Multiple issues where reported by Engineer:

    • Replace jack
      https://www.digikey.com/en/product-highlight/c/cui/ip-rated-audio-jacks

    • Replace speakers

    • Find amp for new speakers
11. Engineer162 commented on Mar 14, 2026

    

    Engineer162

    on Mar 14, 2026

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    Working on it currently. Speakers need to be replaced as the current ones are intended for small embedded devices or headphones and will not sound great in this use case. Additionally an audio amp between the CODEC line out and speakers is needed as the CODEC line out is not intended for direct drive, and if direct drive is attempted the CODEC will probably die. Which is why i'm also looking into a suitable amp that is picked in relation to the new speakers.