b'Circuit 4A: LCDPrinting Hello, world! is usually the first thing that programming tutorials will have Hello, World! you do in a new language. This guide starts by blinking an LED, but now were going to print out real text using a Liquid Crystal Display (LCD).YOUPOTENTIOMETER16 JUMPER WIRESNEEDLCD DISPLAY NEW COMPONENTS a potentiometer, the contrast can be adjusted. As you rotate the knob on the CHARACTER LIQUID CRYSTALpotentiometer, you should notice that the DISPLAY (LCD): Designed to show ascreen will get brighter or darker and that grid of letters, numbers and other specialthe characters become more visible or characters, LCDs are great for printingless visible. The contrast of LCDs is highly data and showing values. When currentdependent on factors such as temperature is applied to this special kind of crystal,and the voltage used to power them. Thus, it turns opaque. This is used in a lot ofexternal contrast knobs are needed for calculators, watches and simple displays.displays that cannot automatically account Adding an LCD to your project will make itfor temperature and voltage changes.super portable and allow you to integrate up to 32 characters (16x2) of information. PIXELS: If you look closely at the characters on the LCD, you will notice that they are actually made up of lots of little squares. These little squares are called pixels. The size of displays is often represented in pixels. Pixels make up character space, which is the number of pixels in which a character can exist.NEW CONCEPTS Here is a capital letter B as created in pixels. The CONTRAST: Pin 3 on the LCD controlscharacter space in this the contrast and brightness of the LCD.example is 6 pixels x 8 pixels.Using a simple voltage divider with 72 : circuit 4a'