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Teensy 4.1

Teensy 4.1

A high-performance ARM Cortex-M7 development board designed for demanding embedded applications.

Our Verdict

Best for

Advanced makers needing 600 MHz processing and extensive peripheral support.

Skip if

Beginners or projects requiring 5V logic tolerance.

What is Teensy 4.1?

The Teensy 4.1 is a powerful microcontroller board featuring an NXP i.MX RT1062 processor running at 600 MHz, providing exceptional computing power in a compact form factor. It includes expanded memory options with an onboard MicroSD card socket and room for optional Flash and PSRAM chips. Building on the success of its predecessor, the 4.1 retains the familiar breadboard-friendly layout while adding significantly more I/O pins, an Ethernet PHY, and a USB host port, making it ideal for advanced audio processing, robotics, and custom hardware controllers.

SpecificationsAI-estimated

msrp$29.95
weight5g
warranty1 year
dimensions61 x 18 mm
open sourceโŒ No
connectivityUSB 2.0, 10/100 Ethernet PHY, Serial, SPI, I2C, CAN Bus
power sourceUSB Powered

Key Features of Teensy 4.1

Powered by an NXP i.MX RT1062 ARM Cortex-M7 processor operating at 600 MHz for rapid data processing.
Features 8MB of onboard Flash memory with solder pads to easily add external PSRAM and flash memory chips.
Includes a built-in MicroSD card socket for convenient data logging and storage capabilities.
Equipped with a native 10/100 Mbps Ethernet PHY for wired network connectivity projects.
Provides a dedicated USB host port supporting USB MIDI, keyboards, mice, and mass storage devices.
Offers 55 total I/O pins with multiple serial, SPI, I2C, and analog interfaces for versatile hardware integration.
Fully compatible with the Arduino IDE and the Teensyduino software add-on for seamless sketch compilation.

Use Cases for Teensy 4.1

1

Custom MIDI Controllers

Build sophisticated musical instruments and MIDI interfaces utilizing the native USB host port and fast processing speed.

2

Data Logging Systems

Record high-frequency sensor data directly to a MicroSD card using the integrated card socket.

3

Network-Connected IoT

Deploy smart home sensors and web servers using the onboard Ethernet PHY and TCP/IP stack.

4

Advanced Robotics

Control multiple high-speed motors, servos, and sensors simultaneously with abundant PWM and communication pins.

Pros & Cons of Teensy 4.1

Pros

  • Incredible processing speed and performance for a microcontroller
  • Ample memory and expansion options via MicroSD and memory pads
  • Extensive peripheral support including Ethernet and USB host
  • Familiar and robust Arduino/Teensyduino software ecosystem

Cons

  • Operates at 3.3V logic and is not 5V tolerant
  • Larger physical size compared to the Teensy 4.0
  • Steeper learning curve for advanced networking and peripheral configuration

Frequently Asked Questions

Is the Teensy 4.1 compatible with Arduino libraries?

Yes, it works with the Arduino IDE using the Teensyduino add-on, which adapts most standard Arduino libraries.

Does the Teensy 4.1 require external power?

It can be powered via the USB port or through the VIN pin using an external 5V power supply.

Are the I/O pins 5V tolerant?

No, all digital and analog I/O pins on the Teensy 4.1 operate at 3.3V and are strictly not 5V tolerant.

How do I use the Ethernet feature?

You can solder an appropriate magnetics jack to the dedicated Ethernet pins on the board to enable wired networking.

Paid (One-time)

Detailed plans are not listed. Visit the official website for pricing information.

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About the Tool

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Target AudienceAdvanced makers, engineers, and embedded developers

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