Teensy 4.0 board to break out all pins via castellated holes to 2 headers of dual-row 14 pin headers.

Solder the Teensy directly to this board then add headers for easy connection.

See the GitHub Repository for details.

Note: It’s best to have these boards made with the 1.6mm thickness. The 0.8mm process has been proven to be unreliable with missing cutouts and torn-off castellated pads.