Teensy Arduino Shield Adapter

The Teensy is an amazing and compact development platform, but its breadboard-friendly form factor isn't compatible with the vast Arduino shield ecosystem. This adaptor board solves that problem, allowing you to plug your Teensy directly into the standard Arduino R3 footprint. It's the perfect tool for upgrading your existing Arduino projects to a more powerful controller without complex wiring or breadboards.

Seamless Arduino Shield Integration

This adaptor breaks out the Teensy's pins to the standard Arduino 1.0 (R3) layout. Simply solder your Teensy (sold separately) to the designated footprint on the adaptor, and you can plug in your favourite shields. Because this is a passive adaptor, no special programming is required for the board itself—you just need to program your Teensy to communicate with whatever shield you've attached.

Onboard Power & Prototyping Features

This board is more than just a pin adaptor. It adds several key features to create a complete, self-contained project:

• Flexible Power: Includes a 4-12V barrel jack and a 2-pin JST connector, giving you flexible options for powering your entire project from a wall adaptor or a LiPo battery.
• Real-Time Clock (RTC): A coin cell battery holder is included (battery not included) to power the Teensy's RTC, allowing your project to keep accurate time even when the main power is off.
• ICSP Header: An ICSP (In-Circuit Serial Programming) header is broken out, which is essential for certain shields that use it for SPI communication.

Compatibility & Considerations

This adaptor is designed to be highly versatile, but there are important compatibility details to keep in mind:

• Teensy Fit: The adaptor footprint fits the Teensy LC and was designed to fully utilise the features of the Teensy 3.1. While the LC will fit, not all adaptor features (like the RTC) are compatible with it. This adaptor is not compatible with the Teensy 4.0 due to the differences in the pin layout.
• Voltage Warning: The Teensy is a 3.3V device. This adaptor is for 3.3V-compatible shields. It may be incompatible with older, 5V-only Arduino shields. Using a 5V shield can permanently damage your Teensy. Please check the logic level of your shield before use and consult the hookup guide for more information.

This adaptor board is the key to unlocking a massive library of existing hardware for your high-performance Teensy controller, making it the perfect tool for rapid prototyping and project upgrades.

Note: Basic soldering is required to assemble this kit.

• Schematic
• Eagle Files
• Hookup Guide
• GitHub