Hello Friends,
I hope you find this helpful. The project is incomplete - but I spent a lot of time organizing my thoughts on this. I'm excited to get feedback from the community.
The Teensy 4.0 Audio Toolkit and Shield is part of an open source project for learning about, designing, and prototyping custom Audio PCBs using the Teensy Audio Library. This kit exposes key features of the Teensy commonly used for audio including USB Host Input, MIDI In, Midi Out, Midi Through, SPDIF, and Toslink. The board also includes an SD Memory Card reader, RAM/Memory, and a Power Supply. Plus, the schematic points out the key pins for connecting your own audio chips to the Teensy. This project is just exposing the hardware. Some functions may require additional work on the Teensy Audio Library or your custom code. Project files are in the repo, and completed boards will eventually come available after feedback/review. Use at your own risk.
Teensy Audio Toolkit and Shield's Key Features
Schematic:
Github Repository:
https://github.com/JayShoe/TEENSY_4.0_AUDIO_TOOLKIT
I hope you find this helpful. The project is incomplete - but I spent a lot of time organizing my thoughts on this. I'm excited to get feedback from the community.
The Teensy 4.0 Audio Toolkit and Shield is part of an open source project for learning about, designing, and prototyping custom Audio PCBs using the Teensy Audio Library. This kit exposes key features of the Teensy commonly used for audio including USB Host Input, MIDI In, Midi Out, Midi Through, SPDIF, and Toslink. The board also includes an SD Memory Card reader, RAM/Memory, and a Power Supply. Plus, the schematic points out the key pins for connecting your own audio chips to the Teensy. This project is just exposing the hardware. Some functions may require additional work on the Teensy Audio Library or your custom code. Project files are in the repo, and completed boards will eventually come available after feedback/review. Use at your own risk.
Teensy Audio Toolkit and Shield's Key Features
- Open Source CC BY-NC-SA 4.0
- Stackable Design – To easily integrate with other stackable modules including DAC, ADC, Codec, Bluetooth, etc.
- Starting Point for Custom IO Panels – All inputs/outputs are only exposed as header pins. Use of a custom daughterboard, dongle, or soldering directly to the Audio Toolkit Mainboard to expose the desired jacks or ports.
- SD Card Reader - via DM3D-SF Hirose Electric Co Ltd.
- Memory – via W25Q128JV, W25Q128FV, or 23LC1024 RAM.
- USB Host – via standard pinout USB Header and USB A connector and includes a TPS2055A current limiter chip.
- SPDIF Input and Output – via header, Coax, or Toslink.
- MIDI In, Out, and Through – via header, DIN 5, or 3.5mm 3-pin Mini MIDI and includes an optocoupler (6N137) and a logic gate (74LS00) for proper termination.
- Power Supply – 1 Amp regulator for both 5V and 3.3V rails (LM2940) with an input voltage range of 6 V to 26 V.
- Footprints, 3d Models, and Schematics included.
- Schematic notes and references for SAI1 and SAI2 connectivity to the Teensy.
- More features to come?
Schematic:
Github Repository:
https://github.com/JayShoe/TEENSY_4.0_AUDIO_TOOLKIT