LCD1602 Display Lesson
The display has an LED backlight and it can display two rows with up to 16 characters on each row. You can also see the rectangles for each character on the display and the pixels that make up each character. This LCD display is white on blue and is intended for showing text.
We will run the Arduino example program for the LCD library and learn how to control the LCD1602 Display in this lesson. We can attach a potentiometer for controlling the contrast of the display.
Power Supply Module Lesson
The power supply module with a green/red LED to indicate the presence of power, and an ON / OFF latching switch to control the power to the board. On this particular model and version, the center pin of the barrel socket is positive.
After connecting the wiring and uploading the Arduino program, we can use the potentiometer to control the extent of LED blinking.