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

Introduction

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.

Explore Projects Built with Mtiny Uno ATmega328P

Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!

ATmega328P-Based Sensor Hub with OLED Display and LIDAR

This circuit features an Mtiny Uno ATmega328P microcontroller as its central processing unit, interfacing with a variety of sensors and peripherals. It includes a 0.96" OLED display and an MPU6050 accelerometer/gyroscope for user interface and motion sensing, respectively. The circuit also integrates a TF LUNA LIDAR for distance measurement, a DHT11 sensor for temperature and humidity readings, and uses a 9V battery with a 7805 voltage regulator for power management. Communication with a computer for programming and data exchange is facilitated by an Adafruit FTDI Friend module.

Open Project in Cirkit Designer

ATMEGA328 Battery-Powered LED Blinker with FTDI Programming

This circuit is a basic microcontroller setup using an ATMEGA328, powered by a 5V battery, and includes an FTDI programmer for serial communication. It features a pushbutton for reset functionality and two LEDs controlled by the microcontroller, with one LED blinking at a 1-second interval as programmed.

Open Project in Cirkit Designer

Battery-Powered Environmental Monitoring System with Data Logging and GPS Tracking

This circuit features a T-Deer Pro Mini LoRa Atmega328P microcontroller as its central processing unit, interfacing with various sensors including a BMP280 for atmospheric pressure, an Adafruit VEML6075 UV sensor, a GPS NEO 6M module for location tracking, and an ENS160+AHT21 for environmental sensing. Data logging is handled by a SparkFun OpenLog, and a Step Up Boost converter is used to step up the voltage from a 3.7V battery to 5V required by the ESP32-CAM module. The circuit includes a buzzer for audible alerts and a rocker switch to control power flow, with the microcontroller coordinating sensor data acquisition and communication tasks.

Open Project in Cirkit Designer

Battery-Powered Voltage Monitoring System with OLED Display using ATmega328P

This circuit is a voltage monitoring and display system powered by a 3.7V LiPo battery. It uses an ATmega328P microcontroller to read voltage levels from a DC voltage sensor and displays the readings on a 1.3" OLED screen. The system includes a battery charger and a step-up boost converter to ensure stable operation and power management.

Open Project in Cirkit Designer

Common Applications and Use Cases

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

Technical Specifications

Key Technical Details

• 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

Pin Configuration and Descriptions

Usage Instructions

How to Use the Component in a Circuit

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.

Important Considerations and Best Practices

• 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.

Troubleshooting and FAQs

Common Issues Users Might Face

• 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.

Solutions and Tips for Troubleshooting

• 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.

Example Code for Arduino UNO

// 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.