How to Use Mtiny Uno ATmega328P: Examples, Pinouts, and Specs

The MTiny Uno ATmega328P is a compact microcontroller board designed by Makerlabvn, based on the popular ATmega328P processor. It retains the functionality of the standard Arduino Uno while offering a smaller form factor, making it ideal for space-constrained projects. The MTiny Uno is fully compatible with the Arduino IDE, allowing for easy programming and integration into a wide range of applications, from simple DIY projects to complex electronic systems.

• Educational purposes and workshops
• Prototyping IoT devices
• Wearable electronics
• Robotics
• Hobbyist projects

• Microcontroller: ATmega328P
• Operating Voltage: 5V
• Input Voltage (recommended): 7-12V
• Input Voltage (limits): 6-20V
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 6
• DC Current per I/O Pin: 40 mA
• DC Current for 3.3V Pin: 50 mA
• Flash Memory: 32 KB (ATmega328P) of which 0.5 KB used by bootloader
• SRAM: 2 KB (ATmega328P)
• EEPROM: 1 KB (ATmega328P)
• Clock Speed: 16 MHz
• LED_BUILTIN: Pin 13

1. Powering the Board:

   • Connect a 7-12V power supply to the VIN pin for optimal operation.
   • Alternatively, you can power the board via the USB connection.

2. Programming the Board:

   • Connect the MTiny Uno to a computer using a USB cable.
   • Select "Arduino Uno" as the board type in the Arduino IDE.
   • Choose the correct COM port for the MTiny Uno.
   • Write or open your sketch and upload it to the board.

3. Connecting I/O Devices:

   • Use the digital and analog pins to connect sensors, actuators, and other peripherals.
   • Ensure that connected devices are compatible with the voltage and current specifications of the pins.

• Always disconnect the power source before making or altering connections.
• Do not exceed the recommended voltage and current limits to prevent damage.
• Use a current-limiting resistor with LEDs and other sensitive components.
• Utilize the onboard LED connected to pin 13 for testing and debugging.
• When using PWM outputs, ensure the connected devices are PWM compatible.

• Board not recognized by the computer:

  • Check the USB cable and connections.
  • Ensure the correct drivers are installed.

• Sketch not uploading:

  • Verify the correct board and port are selected in the Arduino IDE.
  • Check for errors in the code and ensure the correct bootloader is used.

• Unexpected behavior in circuits:

  • Double-check wiring and connections.
  • Ensure power supply is stable and within the specified range.

• Use the Arduino IDE's Serial Monitor to debug and print out messages from the board.
• Isolate the problem by testing components individually.
• Consult the Makerlabvn forums or Arduino community for support.

// Blink an LED connected to pin 13

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

void loop() {
  digitalWrite(13, HIGH);   // Turn the LED on
  delay(1000);              // Wait for a second
  digitalWrite(13, LOW);    // Turn the LED off
  delay(1000);              // Wait for a second
}

Note: The above code uses the built-in LED on pin 13. If an external LED is used, ensure it is connected with a suitable current-limiting resistor.

For further assistance or inquiries, please contact Makerlabvn support or refer to the community forums.