How to Use Teensy 3.1: Examples, Pinouts, and Specs

The Teensy 3.1 is a compact and powerful microcontroller board based on the ARM Cortex-M4 processor. It features 32KB of RAM, 256KB of flash memory, and built-in support for USB connectivity. This versatile board is designed for a wide range of embedded projects, including robotics, IoT devices, audio processing, and more. Its small form factor and high performance make it an excellent choice for both hobbyists and professionals.

• Robotics and automation systems
• Internet of Things (IoT) devices
• Audio signal processing and synthesis
• Data logging and sensor interfacing
• Prototyping and educational projects

The following table outlines the key technical details of the Teensy 3.1 microcontroller board:

The Teensy 3.1 has a total of 48 pins, including digital, analog, and power pins. Below is a summary of the pin configuration:

1. Powering the Board:

   • Connect the VIN pin to a power source (3.6V to 6.0V) or use the USB port for power and programming.
   • Ensure the GND pin is connected to the ground of your circuit.

2. Programming the Board:

   • Install the Arduino IDE and the Teensyduino add-on to enable Teensy support.
   • Connect the Teensy 3.1 to your computer via a USB cable.
   • Select "Teensy 3.1" as the board in the Arduino IDE.
   • Write your code and upload it to the board.

3. Connecting Peripherals:

   • Use the digital I/O pins for sensors, actuators, or other devices.
   • Use the analog input pins (A0-A20) for reading sensor data.
   • Use the PWM pins for controlling motors or dimming LEDs.

• The Teensy 3.1 operates at 3.3V logic levels. Ensure that any connected devices are compatible with 3.3V or use level shifters.
• Avoid exceeding the maximum input voltage of 6.0V on the VIN pin to prevent damage.
• Use decoupling capacitors near power pins to reduce noise in sensitive applications.

The following example demonstrates how to blink an LED connected to pin 13:

// Blink an LED on Teensy 3.1
// This example toggles the LED on pin 13 every 500 milliseconds.

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(500);             // Wait for 500 milliseconds
  digitalWrite(13, LOW);  // Turn the LED off
  delay(500);             // Wait for 500 milliseconds
}

1. The board is not recognized by the computer:

   • Ensure the USB cable is properly connected and supports data transfer.
   • Check if the Teensyduino add-on is installed in the Arduino IDE.
   • Press the reset button on the Teensy 3.1 to enter programming mode.

2. Code does not upload to the board:

   • Verify that "Teensy 3.1" is selected as the board in the Arduino IDE.
   • Ensure no other programs are using the USB port.

3. Connected devices are not working:

   • Check the wiring and ensure all connections are secure.
   • Confirm that the devices are compatible with 3.3V logic levels.

• Use a multimeter to check voltage levels and continuity in your circuit.
• Test the board with a simple program (e.g., blinking an LED) to verify functionality.
• Consult the Teensy 3.1 datasheet for detailed technical information.

By following this documentation, you can effectively use the Teensy 3.1 for a variety of embedded projects.