Torsten Stauder
b6faa89cd9
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5 years ago | |
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| 3D-model_downside.jpeg | 5 years ago | |
| 3D-model_upside.jpeg | 5 years ago | |
| Headphone-pcb.pdf | 5 years ago | |
| Headphone-pcb_downside.jpg | 5 years ago | |
| Headphone-pcb_upside.jpg | 5 years ago | |
| Kicad.zip | 5 years ago | |
| README.md | 5 years ago | |
README.md
Headphone-PCB
This is a pcb, that was kindly provided by a user of my Tonuino-fork. It makes use of a DAC named 'PCM5102A' with a TDA1308 as amp. PCM5102A supports I2S, so it can connected in parallel to MAX98357a to the I2S-pins BCLK, LRC and DIN. Of course, it needs 3.3V and GND, too. Please note that SMD-technique is used.
The 6th pin of connector J1 is used to indicate whether there's a plug or not. That means if there is a plug, this pin is pulled to GND and therefore can be used to connect to MAX98357.SD. Doing so will mute MAX's amp and vice versa. Off course you need a special headphone jack to use this feature. Additionaly this 6th pin can be connected to the ESP32 in order to make use of the feature HEADPHONE_ADJUST_ENABLE. Doing so can optionally limit the headphone's maximum volume (configureable via GUI).
Disclaimer
PCB-circuit is provided 'as is' without warranty. As previously stated it was kindly provided by a user and I only can give limited support to it. However: it runs fine without any problems in my Tonuinos.