Design with Expansion board in Cirkit DesignerThe Yahboom STM8S003F3U6TR Expansion Board is a versatile circuit board designed to enhance the functionality of a primary circuit board. It provides additional connections and interfaces, enabling the integration of extra components or modules. This expansion board is particularly useful in prototyping, educational projects, and applications requiring modularity and scalability.
This circuit integrates a Bela Board with various sensors and actuators, including a TRILL CRAFT touch sensor, an ADXXL335 accelerometer, a vibration motor, and a loudspeaker. The Bela Board processes input from the touch sensor and accelerometer, and controls the vibration motor and loudspeaker, while an OLED display provides visual feedback.
Open Project in Cirkit Designer
This circuit features an ESP32 on a baseboard as the central microcontroller, interfaced with various peripherals. It includes a DHT22 sensor for measuring temperature and humidity, an I2C LCD screen for display, a buzzer for audio alerts, and an ESP32 CAM module for capturing images or video. Additionally, the circuit integrates an HX711 bridge sensor interface connected to a load cell for weight measurement, with a 10k Ohm resistor for the DHT22 pull-up configuration.
Open Project in Cirkit Designer
This circuit features an ESP32 microcontroller interfaced with a GPS module, a Micro SD card module, and a DHT11 humidity and temperature sensor for data logging and environmental monitoring. Power is supplied through a DIN rail mount power supply and regulated by a DC buck step-down converter.
Open Project in Cirkit Designer
This circuit integrates a microcontroller with a display, digital potentiometer, IO expander, and opto-isolator board for signal interfacing and isolation. It includes a UART to RS485 converter for serial communication and a power converter to step down voltage for the system. The circuit is designed for control and communication in an isolated and protected environment.
Open Project in Cirkit DesignerThe Yahboom STM8S003F3U6TR Expansion Board is built around the STM8S003F3U6TR microcontroller, offering reliable performance and a range of features. Below are the key technical details:
The pinout of the expansion board is as follows:
| Pin Name | Type | Description |
|---|---|---|
| VCC | Power Input | Power supply input (2.95V to 5.5V) |
| GND | Ground | Ground connection |
| GPIO1-GPIO16 | Digital I/O | General-purpose input/output pins |
| TX | UART TX | UART transmit pin for serial communication |
| RX | UART RX | UART receive pin for serial communication |
| SCL | I2C Clock | I2C clock line for communication |
| SDA | I2C Data | I2C data line for communication |
| MOSI | SPI Data Out | SPI Master Out Slave In |
| MISO | SPI Data In | SPI Master In Slave Out |
| SCK | SPI Clock | SPI clock line |
| RESET | Reset | Resets the microcontroller |
| ADC1-ADC4 | Analog Input | Analog-to-digital converter inputs |
Below is an example of how to interface the expansion board with an Arduino UNO using I2C communication:
#include <Wire.h> // Include the Wire library for I2C communication
#define DEVICE_ADDRESS 0x20 // Replace with the I2C address of your expansion board
void setup() {
Wire.begin(); // Initialize I2C communication
Serial.begin(9600); // Start serial communication for debugging
// Send initialization command to the expansion board
Wire.beginTransmission(DEVICE_ADDRESS);
Wire.write(0x01); // Example command to initialize the board
Wire.endTransmission();
Serial.println("Expansion board initialized.");
}
void loop() {
// Example: Read data from the expansion board
Wire.requestFrom(DEVICE_ADDRESS, 1); // Request 1 byte of data
if (Wire.available()) {
int data = Wire.read(); // Read the received byte
Serial.print("Received data: ");
Serial.println(data);
}
delay(1000); // Wait for 1 second before the next read
}
The board is not powering on:
Communication with the board is not working:
GPIO pins are not functioning as expected:
Erratic behavior or instability:
Q: Can this expansion board be used with Raspberry Pi?
A: Yes, the expansion board can be interfaced with Raspberry Pi using I2C, SPI, or UART communication protocols.
Q: What is the maximum current the board can handle?
A: Each GPIO pin can handle a maximum current of 20mA. Ensure not to exceed this limit to avoid damage.
Q: How do I find the I2C address of the board?
A: Use an I2C scanner sketch on your microcontroller to detect the board's I2C address.
Q: Can I use this board in outdoor environments?
A: The board operates within a temperature range of -40°C to +85°C. However, ensure it is protected from moisture and extreme environmental conditions.