16x2 Character LCD with LED Backlight (Parallel Interface)
 Click on image to enlarge |
|
This 16x2 LCD packs 32 characters into an outline smaller than that of most two-line displays. An LED backlight enables optimal viewing in all lighting conditions. This unit uses the HD44780 interface found on most parallel character displays.
 |
Overview
This 16-character, 2-line parallel liquid crystal display achieves a large viewing area in a compact package. It features a yellow-green LED backlight and uses the common HD44780 interface (330k pdf), so sample interface code is widely available for a variety of microcontrollers.
The DDRAM address 0x00 corresponds to the first character of the top line, address 0x0F corresponds to the last character of the top line, address 0x40 corresponds to the first character of the second line, and address 0x4F corresponds to the last character of the second line.
Sample code for some AVRs (e.g. ATmega168, ATmega328, ATmega324, and ATmega1284) can be found as part of the open-source Orangutan-lib package.
 |
 |
Pin-Out
| Pin | Symbol | Function |
|---|---|---|
| 1 | Vss | ground (0 V) |
| 2 | Vdd | power (4.5 – 5.5 V) |
| 3 | Vo | contrast adjustment |
| 4 | RS | H/L register select signal |
| 5 | R/W | H/L read/write signal |
| 6 | E | H/L enable signal |
| 7-14 | DB0 – DB7 | H/L data bus for 4- or 8-bit mode |
| A | LED+ | 4.2 V for backlight |
| K | LED- | 0 V for backlight |
Using Contrast and the Backlight
 |
As shown in the diagram above, a potentiometer whose output is connected to Vo will allow you to set the contrast for optimal viewing of your display.
The backlight in this LCD is composed of LEDs in series. The total voltage drop across these LEDs is typically 4.2 V and the recommended current through the LEDs is 120 mA. You should use a current limiting resistor RLIMIT as shown above where:
RLIMIT = (VBACKLIGHT – 4.2V) / 0.12A
In the diagram above, VBACKLIGHT is shown as 5 V, but you are not restricted to 5 V; any voltage above the diode-drop voltage will work as long as you choose the appropriate value for your current-limiting resistor. You can also use a PWM-controlled MOSFET to achieve variable dimming of the backlight if so desired.
Note: No cables or connectors are included with this product.You can break a 7x2 segment from the header strip and solder it to the 14 through-holes on the left side of the LCD PCB; the ribbon cable will then plug into the header pins (leaving two holes empty). The header pins won’t enforce proper orientation of the cable, so you will need to take care to plug it in to the correct pins. The 8x2 shrouded box header will not work with this LCD.
Dimensions
| Size: | 85.0 x 29.5 x 13.5 mm |
|---|---|
| Viewing area: | 64.5 x 16.4 mm |
| Dot size: | 0.56 x 0.61 mm |
| Character size: | 3.00 x 5.23 mm |
| Weight: | 35 g |
General specifications
| Minimum operating voltage: | 4.5 V |
|---|---|
| Maximum operating voltage: | 5.5 V |
| Typical LED backlight voltage: | 4.2 V |
| Typical LED backlight current: | 120 mA |
| Supply current: | 2 mA |
Your Review: Note: HTML is not translated!
Rating: Bad Good
Enter the code in the box below:
Click on image to enlarge
Click on image to enlarge
Click on image to enlarge
Click on image to enlarge
 8x2 Character LCD Parallel Interface 00061 $8.95 |
 16x2 Character LCD without Backlight (Parallel Interface) 00071 $9.55 |
