Teensy® USB Development Board

The Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port.

32 Bit Teensy® Boards
High performance
Large Memory
Plentiful Resources
Teensy 4.0

600 MHz Cortex-M7
Teensy 4.1

600 MHz Cortex-M7
Teensy 3.2

72 MHz Cortex-M4
3.3V signals, 5V tolerant
Teensy 3.6

180 MHz Cortex-M4F
3.3V signals
Teensy LC

48 MHz Cortex-M0+
3.3V signals
Teensy 3.5

120 MHz Cortex-M4F
3.3V signals, 5V tolerant
8 Bit Teensy® Boards
Legacy Compatibility
5 Volt Signals
Teensy 2.0

16 MHz AVR
5V signals
Teensy++ 2.0

16 MHz AVR
5V signals

Key Features:
  • Compatible with Arduino Software & Libraries
  • USB can be any type of device
  • Single pushbutton programming
  • Easy to use Teensy Loader application
  • Free software development tools
  • Works with Mac OS X, Linux & Windows
  • Tiny size, perfect for many projects
  • Available with pins for solderless breadboard
SpecificationTeensy 2.0Teensy++ 2.0Teensy 3.0Teensy 3.1
8 bit AVR
16 MHz
8 bit AVR
16 MHz
32 bit ARM
48 MHz
32 bit ARM
72 MHz
Flash Memory32256130048131072262144
RAM Memory256081921638465536
I/O25, 5 Volt46, 5 Volt34, 3.3 Volt34, 3.3V, 5V tol
Analog In1281421

Teensy Loader Application

The Teensy Loader makes getting code into your Teensy easy. Just press and release the reboot button and the processor runs the HalfKay bootloader, which is automatically detected. Teensy Loader lets you download your code and reboot to it.

Automatic mode downloads and reboots to your code the instant your computer detects HalfKay. The latest version of your code is always used. Just press the button and within 1 to 2 seconds your latest code is running!

Software Development Tools

WinAVR C compiler.

Teensyduino, add-on for Arduino IDE.

Simplified USB Examples or Dean Camera's LUFA library.

Breadboard Usage

The Teensy is available with header pins, for direct no-soldering-required use on a breadboard, which can also be run from the +5 volt from the USB cable. Standard Teensy boards come with solder pads. Either way, all Teensy boards come fully assembled and tested, so no surface mount soldering is needed.

The Teensy with header pins is easy to use with a solderless breadboard

The 128x64 Graphics LCD can be used with Teensy 2.0 and Teensy++ 2.0 and Teensyduino using this GLCD library. They fit together nicely on a single breadboard.

Teensy++ 2.0 with 128x64 Graphics LCD