User Manual

Lesson 28 Four Digital Seven Segment Display
Overview
In this lesson, you will learn how to use a 4-digit 7-segment display.
When using 1-digit 7-segment display please notice that if it is common anode, the
common anode pin connects to the power source; if it is common cathode, the
common cathode pin connects to the GND.
When using 4-digit 7-segment display, the common anode or common cathode pin
is used to control which digit is displayed. Even though there is only one digit
working, the principle of Persistence of Vision enables you to see all numbers
displayed because each the scanning speed is so fast that you hardly notice the
intervals.
Component Required:
(1) x Elegoo Mega2560 R3
(1) x 830 tie-points breadboard
(1) x 74HC595 IC
(1) x 4 Di g i t 7 -Se gme n t Display
(4) x 220 oh m re sis tor s
(2 3 ) x M- M wire s ( Male t o Mal e jump er wire s)
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