1. Segment Identification
Seven Segment Displays
Seven Segment Displays
Digital Electronics
2.3 Data of Birth Design Problem
Segment Identification
A Seven-Segment Display (SSD) is simply a figure eight grouping of LEDs {some include a decimal point (DP)}.
Each Segment is labeled ____ thru ____
SSDs are available in two configurations
Common __________ (all LEDs are connected to ground)
Common __________ (all LEDs are connected to Vcc)
The common cathode and common anode diagrams shown are typical pin layouts. They may or may not be the same as the device that the students will use to build their circuits. a b c d e g dp f 1
Project Lead The Way, Inc.
Copyright 2009 1

2. Example #1: Common Anode SSD
Seven Segment Displays
Seven Segment Displays
Digital Electronics
2.3 Data of Birth Design Problem
Example #1: Common Anode SSD
Example
What value would be displayed in the common anode seven-segment display shown?
Pause the presentation and allow the students to work on the example. The solution is on the next slide. 2
Project Lead The Way, Inc.
Copyright 2009 2

3. Example #2: Common Cathode SSD
Seven Segment Displays
Seven Segment Displays
Digital Electronics
2.3 Data of Birth Design Problem
Example #2: Common Cathode SSD
Example
What value would be displayed in the common cathode seven-segment display shown?
Pause the presentation and allow the students to work on the example. The solution is on the next slide. 3
Project Lead The Way, Inc.
Copyright 2009 3

4. Example #3: Resistor Value
Seven Segment Displays
Seven Segment Displays
Digital Electronics
2.3 Data of Birth Design Problem
Example #3: Resistor Value
Example
Calculate the resistor value required to have a luminous intensity of 2.5.
Pause the presentation and allow the students to work on the example. The solution is on the next slide. 4
Project Lead The Way, Inc.
Copyright 2009 4