The SparkFun Qwiic Pro Micro - USB-C is a versatile development board that harnesses the power of the ATmega32U4 microcontroller. This board is an excellent choice for hobbyists and professionals alike, providing a compact form factor with a USB-C connection for programming and power. The inclusion of Qwiic connectors simplifies the process of integrating various sensors and modules, making it an ideal platform for rapid prototyping and development of electronic projects.
Explore Projects Built with SparkFun Qwiic Pro Micro - USB-C
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This circuit features a SparkFun Pro Micro microcontroller interfaced with an L298N DC motor driver to control two DC motors, an HC-SR04 ultrasonic sensor for distance measurement, a Bluetooth module HM-10 for wireless communication, and an MPU-6050 for motion tracking. The Pro Micro is responsible for processing sensor data and managing motor speeds and directions via the motor driver. Power is supplied by a 5V battery connected to the Pro Micro and a separate battery case providing 12V to the motor driver.
This circuit is a custom game controller featuring a SparkFun Pro Micro microcontroller, multiple tactile pushbuttons, and two analog joysticks. The Pro Micro reads inputs from the buttons and joysticks, processes them, and sends the corresponding gamepad signals. Additionally, a Raspberry Pi 4B is powered by a Pisugar S Pro battery module.
This circuit integrates multiple microcontrollers (Maple Mini STM32F1, nRF52840 ProMicro, and Arduino Pro Mini) to interface with various peripherals including an SSD1306 OLED display, an SD card module, and a Si4463 RF module. The circuit is designed for data acquisition, storage, and wireless communication, with power supplied through a USB Serial TTL module.
This circuit uses a SparkFun Pro Micro microcontroller to control a WS2812 RGB LED strip, with brightness adjusted via a potentiometer. Two 16-channel analog multiplexers are used to expand the input/output capabilities, and a resistor and capacitor are included for signal integrity and power stabilization.
Educational platforms for teaching electronics and programming
Custom keyboard or game controller projects
Technical Specifications
Key Technical Details
Microcontroller: ATmega32U4
Operating Voltage: 3.3V
Input Voltage: 5V (via USB-C)
Digital I/O Pins: 12
PWM Channels: 5
Analog Input Channels: 4
DC Current per I/O Pin: 40 mA
Flash Memory: 32 KB (ATmega32U4) of which 4 KB used by bootloader
SRAM: 2.5 KB (ATmega32U4)
EEPROM: 1 KB (ATmega32U4)
Clock Speed: 8 MHz
Qwiic Connectors: 2x
Pin Configuration and Descriptions
Pin Number
Function
Description
1
TXO
Transmit pin for serial communication
2
RXI
Receive pin for serial communication
3
GND
Ground
4
GND
Ground
5
2
General purpose digital I/O pin
6
3
General purpose digital I/O with PWM
...
...
...
23
A3
Analog input channel 3
24
A2
Analog input channel 2
25
A1
Analog input channel 1
26
A0
Analog input channel 0
27
RST
Reset pin
28
GND
Ground
29
RAW
Raw voltage input for VCC
30
VCC
Positive supply voltage
Note: This is a partial table for illustration purposes.
Usage Instructions
How to Use the Component in a Circuit
Powering the Board: Connect the USB-C cable to the board and a computer or USB power source.
Connecting Qwiic Devices: Attach Qwiic-enabled devices to the Qwiic connectors on the board.
Programming: Use the Arduino IDE or other compatible software to write and upload sketches to the board.
I/O Pin Usage: Utilize the digital and analog pins for interfacing with various sensors, actuators, and other components.
Important Considerations and Best Practices
Ensure that the input voltage does not exceed the recommended 5V.
When using PWM, be aware of the current limitations of the I/O pins.
Avoid exposing the board to static electricity or physical stress.
Always disconnect the board from power sources before making or altering connections.
Example Code for Arduino UNO
// Blink an LED connected to pin 9
void setup() {
pinMode(9, OUTPUT); // Set pin 9 as an output
}
void loop() {
digitalWrite(9, HIGH); // Turn the LED on
delay(1000); // Wait for a second
digitalWrite(9, LOW); // Turn the LED off
delay(1000); // Wait for a second
}
Troubleshooting and FAQs
Common Issues
Board Not Recognized: Ensure the USB-C cable is properly connected and the computer's drivers are up to date.
Sketch Not Uploading: Check the selected board and port in the Arduino IDE. Ensure the correct drivers are installed.
Qwiic Device Not Working: Verify that the Qwiic device is correctly connected and compatible with the board.
Solutions and Tips for Troubleshooting
Driver Installation: Make sure to install the necessary drivers for the board on your computer.
Cable Check: Use a known good USB-C cable and port.
IDE Settings: Double-check the board and port settings in your development environment.
Reset the Board: Press the reset button on the board if it becomes unresponsive.
FAQs
Q: Can I power the board without a USB-C connection?
A: Yes, you can supply power through the RAW pin, but ensure the voltage is regulated and does not exceed 5V.
Q: How many Qwiic devices can I connect?
A: You can daisy-chain multiple Qwiic devices, but be mindful of the power consumption and I2C address conflicts.
Q: Is the board compatible with all Arduino libraries?
A: Most libraries that support the ATmega32U4 should be compatible, but some may require modifications due to the board's specific hardware configuration.
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