SMH1602-L 16x2 Character LCD Display Module with RGB Backlight

Indledning

This manual provides essential information for the setup, operation, and maintenance of the simair SMH1602-L 16x2 Character LCD Display Module. This module features a 16-character by 2-line display with an RGB color backlight, offering versatile display options for various electronic projects. Please read these instructions carefully before use to ensure proper functionality and longevity of the product.

Specifikationer

The following table details the technical specifications of the SMH1602-L LCD module:

The module supports both 3.3V and 5V operating voltages, making it compatible with a wide range of microcontrollers. The FSTN LCD mode provides a clear display, complemented by an RGB backlight for customizable color options.

Figure 1: SMH1602-L LCD Module Overview

Udvendige dimensioner

The physical dimensions of the SMH1602-L module are 80.0mm (Length) x 36.0mm (Width) x 12.0mm (Height). The pin spacing is 2.54mm, and it features 18 pins for connection.

Figure 2: External Dimensions Diagram

Figure 3: Key Dimensions and Voltage Information

Pin beskrivelser

The module features an 18-pin interface. The function of each pin is described below:

Figure 4: Pin Descriptions Diagram

Opsætning og installation

To integrate the SMH1602-L LCD module into your project, follow these general steps:

1. Strømtilslutning: Connect Pin 1 (VSS) to Ground (0V) and Pin 2 (VDD) to your logic power supply (+3.3V or +5V). Ensure your microcontroller's logic level matches the chosen VDD.
2. Kontrastjustering: Connect Pin 3 (V0) to a potentiometer (typically 10kΩ) with its ends connected to VDD and VSS. The wiper of the potentiometer connects to V0, allowing you to adjust the display contrast.
3. Kontrolsignaler:
   • RS (Register Select): Connect Pin 4 to a digital output pin on your microcontroller. High for data, Low for command.
   • R/W (Read/Write): Connect Pin 5 to a digital output pin. High for reading from LCD, Low for writing to LCD. For most applications, this can be tied to Ground if only writing to the LCD.
   • E (Enable): Connect Pin 6 to a digital output pin. A high-to-low pulse on this pin latches data into the LCD.
4. Databus: Connect Pins 7-14 (DB0-DB7) to digital I/O pins on your microcontroller. You can use either 4-bit or 8-bit parallel mode. For 4-bit mode, typically only DB4-DB7 are used, and DB0-DB3 are left unconnected.
5. RGB-baggrundsbelysningskontrol:
   • LED-A (Anode): Connect Pin 15 to +3.3V or +5V (matching VDD).
   • LED-R (Red Cathode): Connect Pin 16 to a digital output pin (often via a current-limiting resistor) to control the Red component.
   • LED-G (Green Cathode): Connect Pin 17 to a digital output pin (often via a current-limiting resistor) to control the Green component.
   • LED-B (Blue Cathode): Connect Pin 18 to a digital output pin (often via a current-limiting resistor) to control the Blue component.

   By controlling the individual R, G, and B cathodes, you can achieve various backlight colors. Ensure appropriate current-limiting resistors are used for the backlight LEDs to prevent damage.

Always double-check your wiring before applying power to prevent damage to the module or your microcontroller.

Betjeningsvejledning

The SMH1602-L LCD module is controlled via a parallel interface, typically using a microcontroller. The SPLC780D (or equivalent) controller is compatible with standard HD44780-based LCD libraries available for most microcontrollers (e.g., Arduino LiquidCrystal library).

Displaying Characters:

1. Initialisering: After power-up, the LCD needs to be initialized by sending a sequence of command bytes. This typically involves setting the interface mode (4-bit or 8-bit), display on/off, cursor settings, and clearing the display.
2. Afsendelse af kommandoer: To send a command (e.g., clear display, set cursor position), set the RS pin LOW, R/W pin LOW, place the command byte on the data bus (DB0-DB7 or DB4-DB7 for 4-bit mode), and pulse the E pin from HIGH to LOW.
3. Afsendelse af data: To send character data to be displayed, set the RS pin HIGH, R/W pin LOW, place the character ASCII byte on the data bus, and pulse the E pin from HIGH to LOW.

Controlling RGB Backlight:

The RGB backlight is controlled by applying appropriate voltage levels to the LED-R, LED-G, and LED-B cathode pins (Pins 16, 17, 18). Since these are cathodes, pulling a pin LOW (to ground) will turn on that color component, assuming LED-A (Pin 15) is connected to VDD.

• To turn on Red: Set LED-R LOW, LED-G HIGH, LED-B HIGH.
• To turn on Green: Set LED-R HIGH, LED-G LOW, LED-B HIGH.
• To turn on Blue: Set LED-R HIGH, LED-G HIGH, LED-B LOW.
• To turn on White (all colors): Set LED-R LOW, LED-G LOW, LED-B LOW.
• To turn off backlight: Set LED-R HIGH, LED-G HIGH, LED-B HIGH.

By using Pulse Width Modulation (PWM) on the R, G, and B pins, you can achieve a wide spectrum of colors and adjust brightness.

Fejlfinding

• No Display/Garbled Characters:
  • Check power connections (VDD, VSS) and ensure correct voltage (3.3V eller 5V).
  • Adjust the contrast potentiometer (V0). Sometimes the display appears blank if contrast is set too high or too low.
  • Verify all data and control lines (RS, R/W, E, DB0-DB7) are correctly wired and connected to the appropriate microcontroller pins.
  • Ensure your initialization code matches the LCD controller (SPLC780D) and the chosen interface mode (4-bit or 8-bit).
  • Check for loose connections or solder bridges on the module or breadboard.
• Baggrundslys virker ikke:
  • Verify LED-A (Pin 15) is connected to VDD.
  • Ensure LED-R, LED-G, LED-B (Pins 16, 17, 18) are correctly connected to digital output pins and are being driven LOW to activate the respective color.
  • Check for proper current-limiting resistors on the backlight cathode pins.
  • Confirm the backlight pins are receiving the correct voltage/signal from the microcontroller.
• Intermitterende problemer:
  • Ensure stable power supply. Add decoupling capacitors near the VDD pin if experiencing noise.
  • Tjek for korrekt jording.
  • Review your code for timing issues, especially with the Enable (E) pulse.

Opretholdelse

To ensure the longevity and optimal performance of your SMH1602-L LCD module:

• Håndtering: Handle the module by its edges to avoid touching the display area or sensitive electronic components.
• Rensning: Brug en blød, fnugfri klud, let drænetampened with water or a mild screen cleaner, to gently wipe the display surface. Avoid abrasive materials or harsh chemicals.
• Opbevaring: Store the module in a dry, dust-free environment within the specified storage temperature range (-30℃ to +80℃).
• Strømforsyning: Always use a stable and regulated power supply within the specified operating voltage (3.3V or 5V). Overvoltage can permanently damage the module.
• ESD beskyttelse: Take precautions against Electrostatic Discharge (ESD) when handling the module, as static electricity can damage sensitive components.

Garanti og support

The SMH1602-L LCD module comes with a 1-year product warranty and lifetime technical support from simair. For any technical assistance or warranty claims, please contact the seller directly.

Serviceforpligtelser:

• Hurtig levering: Efforts are made to ensure prompt delivery.
• Refusionspolitik: Refunds may be issued for delayed delivery, lost packages, or damaged items.

For detailed information regarding specific service terms, please refer to the official product page or contact customer support.