16 x 2 lcd display free sample

We come across Liquid Crystal Display (LCD) displays everywhere around us. Computers, calculators, television sets, mobile phones, and digital watches use some kind of display to display the time.

An LCD screen is an electronic display module that uses liquid crystal to produce a visible image. The 16×2 LCD display is a very basic module commonly used in DIYs and circuits. The 16×2 translates a display of 16 characters per line in 2 such lines. In this LCD, each character is displayed in a 5×7 pixel matrix.

Contrast adjustment; the best way is to use a variable resistor such as a potentiometer. The output of the potentiometer is connected to this pin. Rotate the potentiometer knob forward and backward to adjust the LCD contrast.

Sends data to data pins when a high to low pulse is given; Extra voltage push is required to execute the instruction and EN(enable) signal is used for this purpose. Usually, we set en=0, when we want to execute the instruction we make it high en=1 for some milliseconds. After this we again make it ground that is, en=0.

A 16X2 LCD has two registers, namely, command and data. The register select is used to switch from one register to other. RS=0 for the command register, whereas RS=1 for the data register.

Command Register: The command register stores the command instructions given to the LCD. A command is an instruction given to an LCD to do a predefined task. Examples like:

Data Register: The data register stores the data to be displayed on the LCD. The data is the ASCII value of the character to be displayed on the LCD. When we send data to LCD, it goes to the data register and is processed there. When RS=1, the data register is selected.

Generating custom characters on LCD is not very hard. It requires knowledge about the custom-generated random access memory (CG-RAM) of the LCD and the LCD chip controller. Most LCDs contain a Hitachi HD4478 controller.

CG-RAM address starts from 0x40 (Hexadecimal) or 64 in decimal. We can generate custom characters at these addresses. Once we generate our characters at these addresses, we can print them by just sending commands to the LCD. Character addresses and printing commands are below.

LCD modules are very important in many Arduino-based embedded system designs to improve the user interface of the system. Interfacing with Arduino gives the programmer more freedom to customize the code easily. Any cost-effective Arduino board, a 16X2 character LCD display, jumper wires, and a breadboard are sufficient enough to build the circuit. The interfacing of Arduino to LCD display is below.

The combination of an LCD and Arduino yields several projects, the most simple one being LCD to display the LED brightness. All we need for this circuit is an LCD, Arduino, breadboard, a resistor, potentiometer, LED, and some jumper cables. The circuit connections are below.

Icanhaz.js is ICanHaz.js is Copyright (c) 2010 Henrik Joreteg (Mustache and Mustache.js are Copyright (c) 2009 Chris Wanstrath (Ruby) and Copyright (c) 2010 Jan Lehnardt (JavaScript) respectively)

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Portions relating to lightbox are licensed under Creative Commons Attribution 2.5 License (http://creativecommons.org/licenses/by/2.5/). Lightbox was authored by Lokesh Dhakar (lokeshdhakar.com).

RC1602B 16x2 Character LCD display has the same specs as RC1602B1. These 2 LCD display modules have the same module dimension 80.0 x 36.0 mm, sharing the same IC ST7066. Default interface is 6800; if you require interface such as SPI or I2C, they’re also available, but the IC will be replaced with RW1063.

Default power supply is 5V (3V is optional). Negative voltage is an available option for 3V module. The difference between RC1602B and RC1602B1 is the position of pins. Pins of RC1602B is at the top; Pins of RC1602B1 is at the bottom. LED can be driven by PIN1, PIN2, PIN15, PIN16 or A and K.

RC1602B LCD Display Module 16 Character x 2 Lines with LED backlight provides various color combinations for backlight, for example, yellow-green, blue, white, amber, red. This LCD module without backlight is also available.

I"m using an MSP430 MCU to read analog signals and display the results on an LCD with a SPI connection. The LCD is a 16x2 that is connected according to the SPI connection details on the Datasheet and uses a Hitachi HD44780 driver. I can fill up the 16 characters of the first row no problem. When I go over 16, the last character does not display(as expected) even if I extend the char array that holds the string that I want to print. The problem is that the second row never displays anything. When there are no characters in a position in the first row, there is still a faint background in all positions, but the second row is always continuously blank. Below are the functions that are used in printing. What am I doing wrong?

I know the wiring is correct and the LCD is functional. To test these, I wired the display to an arduino to test, since the code is much easier and I was able to display characters in bow rows. The non-descriptive variables are defined by the MSP430 source files and include registers, buffers, and other controls to put the device in SPI communication mode.

Hey, great instructable. When I first saw the 2x16 display had 8 programmable characters, I was hoping large fonts or some graphics would be possible, but given the few characters, and only two lines to work with, I just assumed a big font would be impossible.

While your letters looked great, in all honesty, your novice (but working!) C code truly made my eyeballs bleed. (Not a snob; I used to do mainframe C compliler language compliance testing, and have worked on Unix utilities for years; so I"m a bit fussy about my C. Code efficiency and compactness is key with me, and are right at home in the Arduino world :) Rather than complain, I"ll contribute :)

- I added Space, period to get character additions rolling. But I got bored, and did a first crack at all the missing characters 0x20-0x5F (mostly punctuation). (A crazy Friday night here, I tell ya, a bit bleary-eyed near the end.) Some of the chars are pretty rough, it"d be great if Michael and/or others could improve upon them.

The C should be pretty straight forward; I use a few slightly advanced C pointer constructs, like "const char *(*p)[2]" (a variable v, which is a pointer, to an array of two pointers to const chars [an array of two string pointers]. There"s an art to understanding and creating C pointers like that; think reading from the inside outworks, working from right to left. Hard to explain, but good to understand to be able to do things efficiently.