> For the complete documentation index, see [llms.txt](https://docs.humancyborgrelations.com/r2d2/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.humancyborgrelations.com/r2d2/platforms/embedded/supplies.md).

# Supplies

The following hardware is required to use the embedded R2-D2 Vocalizer:

* Teensy 4.1 — [TEENSY41\_NE or TEENSY41](https://www.pjrc.com/store/teensy41.html)
* Teensy Audio Adapter — [Rev D](https://www.pjrc.com/store/teensy3_audio.html)
* (Optional) Micro SD Card — [V30 or faster](https://www.sdcard.org/developers/sd-standard-overview/speed-class/) required for WAV playback
* (Optional) SD Card Reader
* USB Micro B cable — Must support data transfer
* Power Supply
* [Command System](/r2d2/platforms/embedded/commands.md#command-system) — Required to send commands to the Teensy
* Amplifier — Required to boost the output from the Teensy for playback through a speaker
* Speaker

Optionally, Trevor Zaharichuk offers [premade boards](https://grnwave.com) to simplify the assembly process. Trevor will generously donate $10 to FIRST for every board sold.


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