Instructions
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Lesson 14: 1-digit LED segment display
LED segment displays are widely used for displaying numerical
information. They are oen used for displays of electromagnetic ovens,
fully automatic washing machines, water temperature displays,
electronic watches, etc. The LED segment display is a semiconductor and
light emitting device. Its basic unit is an LED.
Depending on the wiring of the LED units, the LED segment display can be
divided into displays with common anode and displays with common
cathode. The common anode display combines all anodes of the LED
units into a common anode (COM). For the common anode display, the
common anode (COM) must be connected to + 5 V. If the cathode level of
a segment is low, the segment is on. If the cathode level of a segment is
high, the segment is o. For common cathode display, the common
cathode (COM) must be connected to GND. If the anode level of a
segment is high, the segment is on. If the anode level of a segment is low,
the segment is o.
For the following project is required:
1x
Mega2560 board
1x
USB cable
1x
1-digit
7-segment display
8x
220 Ω resistor
1x
Breadboard
12x
Jumper cable