LCD 16x2 Display Green
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly but instead use a backlight or reflector to produce images in color or monochrome.
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Sparkfun Connecting an LCD 1602 (16x2 character LCD) with an Arduino allows you to display text and even simple graphics in your projects. Here’s a step-by-step guide on how to connect and use an LCD 1602 with an Arduino Uno:
LCD 16X2 DISPLAY FOR PROJECT
Components Needed:
- Arduino Uno
- LCD 1602 (16x2 character LCD) with an I2C backpack module (optional, but recommended for easier wiring)
- Potentiometer (10k ohm)
- Breadboard and jumper wires
LCD 1602 Pinout (without I2C module):
If you're using an LCD 1602 with an I2C backpack module, skip this section and refer to the I2C module pinout instructions below.
- VSS: Ground (GND)
- VDD: +5V (or +3.3V, check the operating voltage of your LCD)
- VO: Contrast adjustment (connect to the wiper terminal of the potentiometer)
- RS: Register select (digital pin on Arduino, e.g., A0)
- RW: Read/write (Grounded for write mode)
- E: Enable (digital pin on Arduino, e.g., A1)
- D0 to D7: Data pins (connect to digital pins on Arduino, e.g., D2 to D7)
LCD 1602 Pinout (with I2C module):
If you have an I2C backpack module attached to your LCD 1602, it simplifies the wiring significantly because it communicates with the Arduino using the I2C protocol. The module typically has the following pins:
- VCC: +5V (or +3.3V, check the operating voltage)
- GND: Ground (GND)
- SDA: I2C data line (connect to A4 on Arduino Uno)
- SCL: I2C clock line (connect to A5 on Arduino Uno)
- Backlight: Backlight control (usually connected to +5V through a resistor for brightness control)
Wiring Instructions (with I2C module):
-
Connect the I2C Module:
- Connect the VCC pin of the I2C module to +5V on the Arduino.
- Connect the GND pin of the I2C module to GND on the Arduino.
- Connect the SDA pin of the I2C module to A4 on the Arduino Uno.
- Connect the SCL pin of the I2C module to A5 on the Arduino Uno.
- Connect the Backlight pin of the I2C module to +5V through a resistor for brightness control (optional).
-
Potentiometer Connection (if using without I2C module):
- Connect one leg of the potentiometer to +5V.
- Connect the other leg of the potentiometer to GND.
- Connect the wiper (middle pin) of the potentiometer to the VO pin of the LCD 1602 for contrast adjustment.
| Model Type |
Other LCD |
|---|---|
| Model No.: |
LCD2004 |
| Backlight Color: |
Yellow |
| Characters |
20 |
| Character Color |
Black |
| Input Voltage (V) |
5 |
| Length (mm): |
60 |
| Width (mm): |
98 |
| Height (mm): |
12 |
| Weight (g): |
70 |
| Shipping Weight | 0.075 kg |
| Shipping Dimensions | 11 × 7 × 2 cm |
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