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CoretechR / Retro-Audio

Portable MP3 Player for Music and Audiobooks
https://hackaday.io/project/185994
GNU General Public License v3.0
126 stars 21 forks source link

What is C1, R12, R15, R27? #3

Closed krokodil66 closed 1 year ago

krokodil66 commented 1 year ago

Very cool project ;-)).

Could not find part "C1" in the BOM. It seems part of the Audio Output Stage. Is it a normal 0.1uF SMD capacitor? on Aisler.net is "!0.01uF" shown in the part list. Would be the following OK?: Vishay | K103K10X7RF5UL2 | Multilayer Ceramic Capacitors MLCC - Leaded K 50V 10NF +/-10% X7R AMMO E3

R12, R15 is also missing on BOM. Is R27 976k or 10k?

CoretechR commented 1 year ago

The parts marked with a "!" are not populated. I forgot to mention that in the documentation. I'm definitely going to update the files to add this, thanks! Any yes, the values you found in the schematic are correct. The resistors are for configuring the output gain. The capacitor is not really necessary, I just left that in if the audio needs filtering.