Caution: The older On Stage III with the mini USB port will probably not work! I tried several and they either did not power the Raspberry Pi properly or I had noise issues that I could not resolve.
Wiring
++ Apart from preparing the audio module there is not much soldering involved. All the components are plugged together with jumper wires and put into the case. +
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Audio Module
- If you are also using the CMJCU-5102 module, you will have to pull the XMT pin to high by connecting it to the 3.3V pin via a 10 kΩ resistor. This will unmute the audio output. Also, the FLT, DMT, SCL and FMT pins should be connected to the module's GND pin on the backside. That way, only a single cable connection to GND on the Raspberry Pi is needed. + If you are also using the CJMCU-5102 module, you will have to pull the XMT pin to high by connecting it to the 3.3V pin via a 10 kΩ resistor. This will unmute the audio output. Also, the FLT, DMT, SCL and FMT pins should be connected to the module's GND pin on the backside. That way, only a single cable connection to GND on the Raspberry Pi is needed.
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