Design with Arduino Mkr Zero in Cirkit DesignerThe Arduino MKR Zero is a microcontroller board that blends the capabilities of the Arduino Zero with the added feature of wireless connectivity, including WiFi and Bluetooth. It is designed around the Atmel SAMD21 microcontroller, a 32-bit ARM Cortex-M0+ processor. This board is ideal for projects requiring a compact form factor, low power consumption, and wireless communication capabilities. Common applications include IoT devices, wearable technology, and smart home applications.
This circuit features an Arduino Mkr Zero microcontroller that controls a WS2812 RGB LED strip and a piezo speaker. A momentary switch is used to toggle the LED strip on and off, with the microcontroller also playing different tones on the speaker based on the LED state. The circuit is powered by a 3.7V battery.
Open Project in Cirkit Designer
This circuit integrates an Arduino Micro Pro and an RP2040 Zero microcontroller, interconnected to share power and ground, as well as several GPIO pins. The RP2040 Zero is programmed with a basic setup and loop structure, indicating it is ready for further development. The design suggests a collaborative processing or sensor data sharing application between the two microcontrollers.
Open Project in Cirkit Designer
This circuit is designed around an Arduino MKR WiFi 1010 microcontroller and includes a variety of sensors: a water level sensor, an MQ-2 gas sensor, a TEMT6000 ambient light sensor, a steam sensor, a DHT11 temperature and humidity sensor, and a rotary encoder. The sensors are powered by the 5V output from the Arduino and their ground pins are connected to the Arduino's ground. The signal outputs from the sensors are connected to various analog and digital input pins on the Arduino, enabling it to monitor environmental conditions such as gas presence, light levels, temperature, humidity, water level, and user input through the rotary encoder.
Open Project in Cirkit Designer
This circuit uses an Arduino Mkr Zero to monitor three force-sensitive resistors (FSRs) and control three corresponding LEDs. When the force on an FSR exceeds a predefined threshold, the associated LED lights up, and the event is logged to an SD card.
Open Project in Cirkit Designer| Pin Number | Function | Description |
|---|---|---|
| 1 | Analog In | A0 - A6: Analog input pins |
| 2 | Digital I/O | D0 - D21: Digital input/output pins |
| 3 | PWM | PWM-enabled digital pins |
| 4 | DAC | Digital-to-Analog Converter output |
| 5 | Reset | Resets the microcontroller |
| 6 | 3.3V | 3.3V power supply pin |
| 7 | 5V | 5V power supply pin (input/output) |
| 8 | GND | Ground |
| 9 | Vin | Input voltage to the board |
| 10 | IOREF | Voltage reference for the microcontroller |
| 11 | RX/TX | UART communication pins |
| 12 | SDA/SCL | I2C communication pins |
| 13 | MISO/MOSI/SCK | SPI communication pins |
| 14 | AREF | Analog reference voltage |
| 15 | USB | Micro USB connection for programming and power |
Powering the Board: The MKR Zero can be powered via the micro USB connection or with an external power supply connected to the Vin pin. The recommended voltage is 5V.
Programming: Connect the board to a computer using a micro USB cable. Select the appropriate board and port in the Arduino IDE, and upload your sketch.
Digital I/O: Use the digital pins for reading digital signals or outputting digital signals with a HIGH (3.3V) or LOW (0V) state.
Analog Input: The analog pins can read voltage levels from 0V to 3.3V and convert them to a digital value.
PWM Output: PWM pins can be used to simulate an analog output using pulse-width modulation.
Analog Output: The DAC pin provides a true analog output which is useful for generating audio signals or other analog waveforms.
Communication: Utilize UART, SPI, or I2C interfaces for communication with other devices or sensors.
Can I power the MKR Zero with more than 5V?
Is the MKR Zero compatible with Arduino shields?
How do I use the onboard WiFi and Bluetooth?
Here is a simple example of blinking an LED connected to pin 6 of the Arduino MKR Zero:
// Define the LED pin
const int ledPin = 6;
void setup() {
// Initialize the LED pin as an output
pinMode(ledPin, OUTPUT);
}
void loop() {
// Turn the LED on (HIGH is the voltage level)
digitalWrite(ledPin, HIGH);
// Wait for a second
delay(1000);
// Turn the LED off by making the voltage LOW
digitalWrite(ledPin, LOW);
// Wait for a second
delay(1000);
}
Remember to comment your code adequately to maintain readability and ease of maintenance. Keep comments concise and within the 80-character line length limit.