Teensy v4.1 3.3v-5v MK2 voltage level shifter for Speeduino (or Arduino Mega)

Description

NEW Features

-Built-in jumper slots for easier reassignment of digital I/O

-Selectable analog/digital I/O modes for Analog pins

-Pre-assembled for ease-of-use

Notes

-VERIFY THAT YOUR SHIELD/HARDWARE AND CODE WILL WORK WITH THIS ADAPTER BEFORE USAGE!

-YOUR BOARD/APPLICATION MAY REQUIRE THE USE OF JUMPERS ON THIS ADAPTER BOARD TO REASSIGN I/O!

-Teensy + Teensy headers are sold separately.

Important Warnings

• Do not exceed specified voltages or currents. Doing so may damage the board.
• This board assumes users have a basic understanding of circuits. Use it at your own risk.

Features

• Designed, built, and ships from the USA!
• 0.100” headers for easy prototyping and breadboarding.
• Fully compatible with most Arduino MEGA shields and hardware.
• Includes provisions for a 3V battery connection to support the Teensy’s RTC (Real-Time Clock) functionality.
• Designed for logic-level control (not for directly driving loads).

Specifications

• Supported Teensy Models:

  • Teensy 4.1: Up to 55 digital I/O, OR 47 digital I/O + 8 analog inputs.

• Voltage Compatibility:

  • Power Input: 2.7V to 5.5V DC.
  • Digital I/O: -0.5V to 5.5V DC.
  • Analog I/O: 0V to 5.5V DC.

• Current Ratings:

  • Maximum draw (5V supply): 950mA.
  • Continuous output (per digital channel): 50mA.
  • Total maximum output (5V side): 700mA.

Usage Instructions

• Supports logic-level control only; do not drive loads directly.
• Pull-up/down resistors below 50kΩ may interfere with digital I/O functionality.
• Ensure an external 5V supply is used for Arduino hardware via the 5V pin, as the VIN pin is not connected.

Assembly Notes

• Verify the Teensy USB connector faces the correct direction during installation.
• Cut the power jumper under the Teensy module if not using USB power (refer to PJRC’s external power documentation).