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Original Arduino Micro without Headers

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Name

Original Arduino Micro without Headers

Category

Microcontrollers

Description

The Original Arduino Micro without Headers is a compact, open-source microcontroller board based on the ATMega328P microprocessor. This board is a popular choice among hobbyists, students, and professionals alike due to its ease of use, versatility, and affordability. The absence of headers makes it ideal for projects where space is limited, and a more customized approach is required.

Functionality

The Arduino Micro without Headers is a microcontroller board that can read inputs from various sensors, perform computations, and control outputs to interact with the physical world. It can be used to create a wide range of projects, including

Robotics and automation systems

Home automation and IoT devices

Wearable electronics and accessories

Interactive art installations and exhibits

Prototyping and proof-of-concept designs

Key Features

### Microcontroller

ATMega328P microprocessor8-bit AVR microcontroller with 32KB of flash memory, 2KB of SRAM, and 1KB of EEPROM

Clock Speed

16MHz

### Input/Output

Digital I/O Pins20 (14 digital, 6 analog)

Analog Input Pins

6 (ADC resolution10-bit)

PWM Pins

6

UART

1 (RX/TX)

SPI

1

I2C1

### Power

Operating Voltage

5V

Input Voltage

7-12V (recommended), 6-20V (limits)

Power Consumption

30mA (average)

### Memory

Flash Memory

32KB

SRAM

2KB

EEPROM

1KB

### Communication

Serial Communication

UART, SPI, I2C

USB Connectivity

Onboard USB-to-TTL serial converter (ATmega16U2)

### Board Features

Compact Size

48.3 mm x 18.1 mm (1.9" x 0.7")

Weight

12g (0.43 oz)

PCB Material

FR4, 1.6 mm thick

Mounting Holes

2 (2.7 mm diameter)

Advantages

Highly versatile and adaptable to various projects

Compact size and low weight make it ideal for wearable electronics and IoT devices

Open-source platform with a large community of developers and users

Easy to program using the Arduino Integrated Development Environment (IDE)

Limitations

Limited processing power and memory compared to more advanced microcontrollers

No built-in Wi-Fi or Ethernet capabilities (require additional modules)

Requires additional headers or jumper wires for connections (due to the absence of pre-mounted headers)

By understanding the features, functionality, and limitations of the Original Arduino Micro without Headers, you can unlock the full potential of this versatile microcontroller board and unleash your creativity in the world of IoT and electronics.

Pin Configuration

  • Original Arduino Micro without Headers Documentation
  • Pinout Description
  • The Original Arduino Micro without Headers is a compact microcontroller board that is based on the ATmega32U4 microprocessor. It has a total of 28 pins, which provide various functionalities for connecting sensors, actuators, and other devices. Here is a detailed description of each pin:
  • Digital Pins
  • 1. RXLED (Pin 17): This pin is connected to the onboard LED that indicates serial transmission.
  • 2. TXLED (Pin 30): This pin is connected to the onboard LED that indicates serial reception.
  • 3. Digital Pin 0 (RX) (Pin 18): This pin is used as a receive pin for serial communication (UART).
  • 4. Digital Pin 1 (TX) (Pin 19): This pin is used as a transmit pin for serial communication (UART).
  • 5. Digital Pin 2 (Pin 20): This pin can be used as a digital input or output.
  • 6. Digital Pin 3 (Pin 21): This pin can be used as a digital input or output. It is also used as an interrupt pin.
  • 7. Digital Pin 4 (Pin 22): This pin can be used as a digital input or output.
  • 8. Digital Pin 5 (Pin 23): This pin can be used as a digital input or output.
  • 9. Digital Pin 6 (Pin 24): This pin can be used as a digital input or output.
  • 10. Digital Pin 7 (Pin 25): This pin can be used as a digital input or output.
  • 11. Digital Pin 8 (Pin 26): This pin can be used as a digital input or output.
  • 12. Digital Pin 9 (Pin 27): This pin can be used as a digital input or output.
  • 13. Digital Pin 10 (Pin 28): This pin can be used as a digital input or output. It is also used as an SPI CS (Chip Select) pin.
  • 14. Digital Pin 11 (Pin 29): This pin can be used as a digital input or output. It is also used as an SPI CLK (Clock) pin.
  • 15. Digital Pin 12 (Pin 1): This pin can be used as a digital input or output. It is also used as an SPI MOSI (Master Out Slave In) pin.
  • 16. Digital Pin 13 (Pin 2): This pin can be used as a digital input or output. It is also used as an SPI MISO (Master In Slave Out) pin.
  • Analog Pins
  • 17. Analog Input Pin 0 (Pin 3): This pin can be used as an analog input.
  • 18. Analog Input Pin 1 (Pin 4): This pin can be used as an analog input.
  • 19. Analog Input Pin 2 (Pin 5): This pin can be used as an analog input.
  • 20. Analog Input Pin 3 (Pin 6): This pin can be used as an analog input.
  • 21. Analog Input Pin 4 (Pin 7): This pin can be used as an analog input.
  • 22. Analog Input Pin 5 (Pin 8): This pin can be used as an analog input.
  • Power Pins
  • 23. VIN (Pin 9): This pin is used to supply voltage to the board.
  • 24. 3V3 (Pin 10): This pin provides a regulated 3.3V output.
  • 25. GND (Pin 11, 12, 21, 22): These pins are used as ground connections.
  • Other Pins
  • 26. RST (Pin 14): This pin is used to reset the microcontroller.
  • 27. VCC (Pin 15): This pin is used to supply voltage to the microcontroller.
  • How to Connect the Pins
  • When connecting the pins, ensure that you have a clear understanding of the pin functions and voltage levels. Here are some general guidelines:
  • Digital pins can be used as inputs or outputs, and can be connected to sensors, actuators, or other devices.
  • Analog pins can be used as inputs and are typically connected to sensors or other devices that provide analog signals.
  • Power pins should be connected to a power source (e.g., a battery or a wall adapter) and should not be connected to any other devices.
  • Ground pins should be connected to a common ground point to ensure proper circuit operation.
  • The RST pin should be connected to a reset button or a pull-up resistor to ensure proper reset functionality.
  • The VCC pin should be connected to a power source, and the VIN pin should be connected to a regulated voltage source.
  • Remember to always follow proper soldering and wiring techniques when connecting the pins to ensure reliable and safe operation of your IoT project.

Code Examples

Original Arduino Micro without Headers
The Original Arduino Micro without Headers is a compact, microcontroller-based board that is part of the Arduino family of boards. It is a popular choice for IoT projects due to its small size, low power consumption, and ease of use.
Technical Specifications:
Microcontroller: ATmega32U4
 Operating Voltage: 5V
 Input Voltage: 6-20V
 Digital I/O Pins: 20
 Analog Input Pins: 12
 PWM Pins: 7
 UART: 1
 SPI: 1
 I2C: 1
 Flash Memory: 32KB
 SRAM: 2.5KB
 EEPROM: 1KB
Getting Started
Before you start using the Original Arduino Micro without Headers, make sure to solder the headers onto the board according to your specific needs. You can use the Arduino Integrated Development Environment (IDE) to program the board.
Code Examples:
### Example 1: Blinking LED
In this example, we will use the Original Arduino Micro without Headers to blink an LED connected to digital pin 13.
```c++
const int ledPin = 13;  // choose the pin for the LED
int ledState = LOW;    // initialize the LED state
void setup() {
  pinMode(ledPin, OUTPUT);  // set the pin as an output
}
void loop() {
  digitalWrite(ledPin, ledState);  // set the LED state
  ledState = !ledState;           // toggle the LED state
  delay(1000);                    // wait for 1 second
}
```
### Example 2: Reading Analog Input
In this example, we will use the Original Arduino Micro without Headers to read the value of a potentiometer connected to analog input pin A0.
```c++
const int potPin = A0;  // choose the pin for the potentiometer
void setup() {
  Serial.begin(9600);  // initialize the serial communication
}
void loop() {
  int sensorValue = analogRead(potPin);  // read the sensor value
  Serial.print("Sensor value: ");
  Serial.println(sensorValue);  // print the sensor value
  delay(100);  // wait for 100ms
}
```
### Example 3: Communicating with an I2C Device
In this example, we will use the Original Arduino Micro without Headers to communicate with an I2C device, such as a temperature sensor.
```c++
#include <Wire.h>  // include the I2C library
const int tempSensorAddress = 0x1A;  // I2C address of the temperature sensor
void setup() {
  Wire.begin();  // initialize the I2C bus
  Serial.begin(9600);  // initialize the serial communication
}
void loop() {
  Wire.beginTransmission(tempSensorAddress);  // start the I2C transmission
  Wire.write(0x00);  // send the register address
  Wire.endTransmission();  // end the I2C transmission
  Wire.requestFrom(tempSensorAddress, 2);  // request 2 bytes of data
  if (Wire.available() == 2) {
    int tempHigh = Wire.read();  // read the high byte
    int tempLow = Wire.read();  // read the low byte
    float temperature = (tempHigh << 8 | tempLow) / 256.0;  // calculate the temperature
    Serial.print("Temperature: ");
    Serial.print(temperature);  // print the temperature
    Serial.println("C");  // print the unit
  }
  delay(1000);  // wait for 1 second
}
```
These examples demonstrate the basic usage of the Original Arduino Micro without Headers in various contexts. You can use this board to create a wide range of IoT projects, from simple automation tasks to complex sensor-based systems.