Design with OpenSegment Serial Display - 20mm (Green) in Cirkit DesignerThe OpenSegment Serial Display - 20mm (Green) is a versatile and easy-to-use seven-segment LED display module designed for displaying numeric and certain alphanumeric characters. Its bright green LEDs ensure good visibility in a variety of lighting conditions. This display is commonly used in digital clocks, timers, counters, and other projects where numerical data needs to be presented to the user.
This circuit features an ESP32 microcontroller connected to a 0.96" OLED display and a green button. The ESP32 powers the OLED display and communicates with it via I2C (with SDA and SCK connected to pins D21 and D22, respectively). The green button is connected to the ESP32's digital input pin D4, allowing it to trigger actions when pressed.
Open Project in Cirkit Designer
This circuit connects an ESP32 microcontroller to a 0.96" OLED display via I2C communication protocol. The ESP32's pins D22 and D21 are used as the serial clock (SCK) and serial data (SDA) lines, respectively, to interface with the OLED's corresponding SCK and SDA pins. The OLED is powered by the 3.3V output from the ESP32, and both devices share a common ground. The embedded code initializes the display and prints 'Hello, ESP32!' on the screen.
Open Project in Cirkit Designer
This circuit features an Arduino UNO microcontroller that interfaces with a seven-segment display and controls a servomotor and two LEDs (red and green). A LM7805 voltage regulator with accompanying capacitors provides a stable 5V power supply. The circuit's functionality is determined by the embedded code, which is currently a placeholder for further development.
Open Project in Cirkit Designer
This circuit consists of multiple GC9A01 display modules interfaced with an ESP32 microcontroller. The ESP32 controls the reset (RST), chip select (CS), data/command (DC), serial data (SDA), and serial clock (SCL) lines of each display, allowing for individual communication with each screen. Additionally, there are pushbuttons connected to the ESP32, which could be used for user input to control the displays or other functions within the circuit.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | VCC | Power supply (3.3V to 7V) |
| 2 | GND | Ground connection |
| 3 | RX | Serial receive pin |
| 4 | TX | Serial transmit pin (not used) |
#include <SoftwareSerial.h>
// Create a software serial port on pins 10 (RX) and 11 (TX)
SoftwareSerial openSegmentSerial(10, 11); // RX, TX
void setup() {
// Start the software serial port at the baud rate of the display
openSegmentSerial.begin(9600);
}
void loop() {
// Send a command to clear the display
openSegmentSerial.write(0x76); // Clear display command
// Display a number with a decimal point
openSegmentSerial.print("12.34");
// Wait for 5 seconds
delay(5000);
// Display a different number
openSegmentSerial.print("5678");
// Wait for another 5 seconds
delay(5000);
}
Note: The above code assumes that the display is set to the default baud rate of 9600 bps. If the baud rate has been changed, update the openSegmentSerial.begin(9600); line with the correct baud rate.
Q: Can I use this display with a 3.3V microcontroller? A: Yes, the display can be powered with 3.3V, making it compatible with 3.3V microcontrollers.
Q: How do I change the baud rate of the display? A: The baud rate can typically be changed through a series of commands sent to the display. Refer to the manufacturer's datasheet for the specific commands.
Q: Can I display letters as well as numbers? A: Yes, the display can show certain alphanumeric characters. Refer to the character set in the manufacturer's datasheet for supported characters.