Teensy 4.1 Microcontroller for Arduino – Headers Pre-Soldered

Please Note: This version of the Teensy 4.1 Microcontroller is pre-soldered with two male headers already attached, allowing you to get started as quickly as possible. If you’d like a board with no headers, please see our standalone Teensy 4.1 board here.

Springboard your next Arduino project with the speediest little development board we’ve seen! The Teensy 4.1 Microcontroller is the latest version of the Teensy board and offers four times more memory space than the Teensy 4.0. Although not technically Arduino, this tiny board integrates with Arduino programming easily using the Teensyduino add-on software and giving your projects a bigger level up in performance than even the Uno or Mega can provide. We are so impressed with the amount of IO pins and interfaces available on the Teensy 4.1, which is also even more than its predecessor. If you’re also a tinkerer enthusiast, ideas are likely already springing to your mind.

While many functional features of the Teensy 4.1 Microcontroller are the same as its predecessor, the Teensy 4.0, it offers a generous 8MB flash memory and additional slots for further memory expansion. This new version includes an ethernet PHY, SD card socket, and USB host port, providing greater I/O capability. These crucial differences instantly open the possibilities when crafting your more advanced Arduino projects. With its small form factor, the Teensy 4.1 fits into numerous creative ideas. Craft wearables that dabble in machine learning, mechanical keyboards, and PC case mods. Teensy can even slip into a Raspberry Pi project or two.

Here’s a glimpse of what else makes the Teensy 4.1 the ultimate choice for Makers and innovators:

• Rocket-Fueled Performance – At its core, the Teensy 4.1 boasts an ARM Cortex-M7 processor clocked at a staggering 600MHz.
• Bucketload of Pin Interfaces – The Teensy 4.1 is more than packed with pins. With 55 digital pins, 18 analog pins, and interfaces for Ethernet, SD card, and USB Host, you'll have the versatility to connect and control a vast array of sensors and devices. On top of that, 35 PWM pins and 32 DMA channels await.
• Enhanced Memory to Spare – With 8MB of Flash memory and additional slots for expanded memory, you have plenty of space for your most ambitious projects. 64K memory is still reserved for recovery & EEPROM emulation.
• More Connection Ports – Enjoy the convenience of an ethernet PHY, SD card socket, and USB host port on top of the plethora of pin interfaces.
• Onboard RTC – Keep track of time and date with the onboard RTC (Real-Time Clock), ensuring your projects are always synchronised with the real world. The Teensy 4.1 supports dynamic clock scaling without disrupting baud rates or Arduino functions, maintaining stable performance across different speeds.
• Robust Power Management – Features power shut-off capability, allowing complete 3.3V power supply disablement via a pushbutton, and an RTC that keeps time even when powered off.
• Teensyduino Wide Compatibility – Reach perfect harmony with your Arduino projects. The Teensy 4.1 comes with open-source Teensyduino add-on software that makes it compatible with the best of Arduino.

Whether you're building robots, IoT devices, audio projects, or anything your imagination can conceive, the Teensy 4.1 is your trusted partner in creation.

Additional Resources:

To reach the perfect harmony with your Arduino projects, the official Teensyduino page gives you the software add-on to make magic happen.

• The PJRC Wiki for the Teensy 4.1 has everything from a getting started guide, Teensy tutorial, and reference documentation.
• If you’re wondering what’s so great about Teensy boards, we’ll let Hackster explain in this informative YouTube video with a Teensy overview, looking at the key differences between the Teensy 4.0 and Teensy 4.1: