- Raspberry Pi 4
- SJ201 Daugherboard
- Audio Chamber
- Dual 5W Speaker drivers
- 4.2" Full Color touchscreen LCD
- Acrylic Enclosure
- Universal 12V power supply (USA, EU,UK, AUS, CCC)
This prototype includes a custom daughterboard (SJ201) that integrates the components from the OTS prototype into a single PCB.
The SJ201 interfaces directly to the Raspberry Pi 4 via the 40-pin GPIO adding a high-quality speaker and microphone array, as well as LEDs and hardware inputs for non-voice interaction and feedback.
The part number SJ201 is derived from Mike’s “Simon Jester” alias in “The Moon is a Harsh Mistress”.
- Audio Front End (XMOS XVF-3510) - for Microphone input processing
- I2S to Line Out (UDA1334ATS)
- 23W Amplifier (Texas Instruments TAS5806)
- 2 Digital MEMS Microphones (ST Micro MP34DT05)
- 12 RGB LEDs (WorldSemi WS2812B-MINI)
- 3 momentary buttons (volume up, volume down, action)
- 1 toggle switch (mic mute)
- ATtiny1614 - control LEDs, other I/O
For technical details of these board see the
The SJ201 connects to the Raspberry Pi GPIO header at a 90 degree angle. This allows the microphone array and hardware inputs to be well positioned in the enclosure, whilst maintaining the simplicity of a direct connection to the main board.
This interface makes a landscape form factor the most viable for this prototype. The blocking of the major components can be found within the Mechanical CAD > MkII Blocking r2.zip.
- Copy our designs – build your own Mycroft Mark 2 - Raspberry Pi Edition or its individual parts
- Modify our designs – remixing is encouraged
- Sell products based on our designs – commercial use is permitted
- Always keep the open license – contribute your output back to the community
- Credit the original author(s) – like they do in science
We are always keen to hear from the community about ways to improve these designs. Whether you're a hacker, maker, engineer, or something else - join us in the:
- Community Forums
- Community Chat
- or email us at [email protected]