Mega 2560 to Teensy 3.5 Adapter Board

Speeduino Mega 2560 to Teensy 3.5 processor upgrade.

Using the Community Gerbers from Josh Stewart’s GitHub with zero changes.

They are known to work with Teensy 3.5. See Josh Stewart‘s Teensy demo on YouTube.

Bare Teensy 3.5 boards $10 each

04/18/22 Have SMDs to build 12 boards (add $12 per board for unsoldered SMDs).

Following is the list of part numbers required to build each board:

2 – LMV324LIDT op-amps

8 – TNPW0805180KBEEA resistors

8 – RT0805BRD07330KL resistors

There may be alternate Part Numbers available. If you can provide those numbers, please do 🙂

Price does not include the Teensy, headers or connector required to complete the build. These are the SMD support chips per BOM.

Shipping USPS to USA only – $8.95 padded envelope

Payment by PayPal goods and services – only

3.49% plus a 49-cent transaction fee

International by request (typically $17 and change)

Email me at with name, phone and shipping address, as well as email address for PayPal request. Phone for text USPS notifications only.

Thank you.