New 8x8 and 16x16 TDM Audio Board for Teensy

I just sold the 40th 8x8 Board on Tindie - 24 Jan 2026

h4yn0nnym0u5e has just validated 32 x 32 and 64 x 64 modes on the open-sourced PCBA boards from JLCPCB, using a Teensy 4.1 with buffered clock signals and alternate DI/DO pins for the additional pairs of boards.

The CPU usage is a moderate 22% with a different synthesised signal for each output channel.

The details are at https://forum.pjrc.com/index.php?threads/updated-8x8-and-16x16-audio.75569/page-6#post-356636

I will look at including at least the 32 x 32 mode in the next board revision.

Several new Wing boards are due from the PCB manufacturer early next week, including an output board that can drive 600 ohm balanced lines to +16dBm using the LM2776 negative voltage generator on the back of the main PCB. Outputs of more than +16dBm would be possible if higher V+/V- voltages are used.

Boards are now available on Tindie and the open source files on GitHub.

Files are now uploaded onto GitHub.

Full PCBA files for JLCPCB for the main board and gerbers / BOM for the others.

Final PCBA boards have arrived. Worked out of the box in both 8x8 and 16x16 mode.

Next steps is to do final checks on the Wing boards and load the PCB files on to GitHub and make the spare boards available on Tindie.

PCB details will be uploaded to the repository once the PCBs have been received and checked.

The main PCB will be made available on Tindie: 

Initial testing has gone well and final boards are currently being manufactured to validate a more compact design.