What is a 7-Segment Display Pinout?
What is a 7-Segment Display Pinout?7 Segment Display Pinout is mostly used in electronic components that display numbers and alphabetic characteristics. It is created with seven individual LEDs each can be on or off independently to make required characteristics or numbers. In this post, we will discuss its pinout, features, working, and other parameters. So let’s get started with Introduction to 7 Segment Display Pinout,
Pinout of 7 Segment Display
- The 7-segment display has 7 LEDs configured in the shape of a digit eight. Every segment comes with a certain label named as A, B, C, D, E, F, and G. The pinout which is related to these labels is mostly labeled on the back side of the display
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | A | Anode for Segment A |
| 2 | B | Anode for segment B |
| 3 | C | Anode for Segment C |
| 4 | D | Anode for segment D |
| 5 | E | Anode for Segment E |
| 6 | F | Anode for segment F |
| 7 | G | Anode for segment G |
| 8 | DP | Anode for the decimal point (if present) |
| 9 | CA | Common Anode (CA) pin |
| 10 | CC | Common Cathode (CC) pin |
7 Segment Display Pinout Working Description
- The anode of every segment A to G is connected with individual pins 1 to 7 and cathodes of all segments are connected with common anode or common cathode pin 9 or 10
- When a certain segment is required to be on the HIGH signal is given to the related anode pin
- In the case of a common anode display the LOW signal is given to the common anode pin on the selected segment. In the case of common cathode displays HIGH signal is given to the common cathode pin on the selected segment
- If many segments have to be on at the same time to display a number or character, the resultant anode pins are on with a signal high or low, and the common anode or common cathode pin is at the opposite signal that is low or high]
- The decimal point or DP anode can be on by applying the HIGH signal to its related pinout 8 for anode pins of required segments
Types of 7-Segment Display
- There are two main types of 7 segment display There are two types of 7-segment displays: The first one is Common Anode and the second one is Common Cathode.
Common Anode 7 Segment Display
- In common anode 7 segment display all anodes of LEDS are configured with each other and make a single pin configuration. The cathodes of every LED are also configured as a single distinct pinout. When the common anode is connected with a positive supply and the cathode of a certain LED is attached to a negative supply LED gets turned on
Common Cathode 7 Segment Display
- In a common cathode 7-segment display all cathodes of LEDs are connected with each other and make a single-pin configuration. The anodes of every LED are also made of a single pinout. When a common cathode is connected with a negative supply and the anode of a certain LED is connected to a positive supply LED gets on
Specifications of 7-Segment Display
- There are some important specifications of a 7-segment display are explained
Forward Voltage Drop
- The forward voltage loss is the voltage needed on the LED segments of 7 segments display. Its value is about 1.8V to 2.2V.
Forward Current
- It is current needed to be on the LED segments of the 7-segment display. its value is about 10mA to 20mA.
Peak Current
- The peak current is the highest current that can pass through LED segments of 7 segments display. Its value is about 100mA.
4 Reverse Voltage
- The reverse voltage is a voltage applied to the LED segments of 7 segments displayed in the reverse direction. Its value is about five volts
Power Dissipation
- The power dissipation is the amount of power that the 7-segment display can dissipate without any damage. It is about 100mw
Operating Temperature
- Its operating temperature is -40°C to 85°C.
| Parameter | Description |
|---|---|
| Digit Height | The height of each segment in millimeters or inches |
| Forward Voltage | The voltage required for the LED to turn on |
| Forward Current | The maximum current that can be passed through each LED |
| Power Dissipation | The amount of power dissipated by the display |
| Luminous Intensity | The brightness of the LED in millicandelas or candelas |
| Operating Temperature | The temperature range at which the display can operate |
| Storage Temperature | The temperature range at which the display can be stored |
| Common Anode/Cathode | Indicates whether the display is a common anode or cathode type |
7-Segment Display Codes
| Number | g f e d c b a | Hex code |
| 0 | 1000000 | C0 |
| 1 | 1111001 | F9 |
| 2 | 0100100 | A4 |
| 3 | 0110000 | B0 |
| 4 | 0011001 | 99 |
| 5 | 0010010 | 92 |
| 6 | 0000010 | 82 |
| 7 | 1111000 | F8 |
| 8 | 0000000 | 80 |
| 9 | 0010000 | 90 |
Working of 7 Segment Display
- The working of this component is very simple. If voltage is applied to certain LED segments of the display it gets on and a correspondent character or number is displayed. Through accurate on and off of LED segments any special number of characters can be displayed.
- The number 8 is shown when power is connected to all segments and if we disconnect power for g, this it shows a zero number. In the 7-segment display power for different pins is given at the same time. We can make a combination of display numerical from zero to nine.
- As 7 segment display not make letters such as X and Z, so it not be used for the alphabet and can used for showing decimal numbers.
- Seven segment displays can make alphabets A, B, C, D,E, and F. So it is used to show the display unit normally comes with a dot point. The display point can exist towards left or right of the display pattern.
- That pattern used to show numbers from zero to nine and letters from A to F hexadecimal digits.
7-Segment Display Truth Table
- The truth table of 7 segment display draws every possible combination of inputs to correspondent output segments which have to be illuminated to display the required character or digit. Here we have made a truth table for the common cathode 7-segment display:
| Input | Segment A | Segment B | Segment C | Segment D | Segment E | Segment F | Segment G |
|---|---|---|---|---|---|---|---|
| 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| 2 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 3 | 1 | 1 | 1 | 1 | 0 | 0 | 1 |
| 4 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
| 5 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
| 6 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| 7 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| 8 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 9 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| A | 1 | 1 | 1 | 0 | 1 | 1 | 1 |
| B | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
| C | 1 | 0 | 0 | 1 | 1 | 1 | 0 |
| D | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
| E | 1 | 0 | 0 | 1 | 1 | 1 | 1 |
| F | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
- We can use this table to find input values to display and the required digit or character on 7 segment display. For instance to display number 7 input values are 1, 1, 1, 0, 0, 0, and 0, which will display the segments A, B, C, and G.
4 Digit 7 Segment Display Truth Table
- The 4-digit 7segment display has four separate digits with every digit consisting of 7 segments which can be on or off to display numbers and letters. The 7 segments are configured in the shape of a digit eight and can be individually regulated to show any of the 10 digits from zero to 9.
- Here you can see the truth table for a 4-digit 7-segment display
| Digit | Segment A | Segment B | Segment C | Segment D | Segment E | Segment F | Segment G |
|---|---|---|---|---|---|---|---|
| 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| 2 | 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 3 | 1 | 1 | 1 | 1 | 0 | 0 | 1 |
| 4 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
| 5 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
| 6 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| 7 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| 8 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 9 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
- In this truth table, every row defines the digit and each column denotes a segment. A 1 in a certain column defines that the correspondent segment is on for a given digit and a zero defines that the segment is on. For instance, the first row of the table represents the digit zero and all 7 segments are on except segment G. Like this the 2nd row denotes the digit 1 with only segments B and C turned on.
7-Segment Display Circuit Diagram
- The circuit of the 7-segment display has 7 individual LED segments labeled A to G and a common cathode or anode that connects to all 7 segments. Each LED segment is attached to a distinct pinout on the microcontroller or other digital circuits, which can be adjusted to either low or high voltage to on or off the segment.
- For display certain light microcontroller sends sequences of signals to certain pins on the required segments. For example, for display, the digit 1 microcontroller will be on only segments B and C. For display, the digit 5 microcontroller will be on the segments A, C, D, F, and G
- With that to display the digits, the 7-segment display circuit can also be used to display letters and other characters through the use of different combinations of segments. Some seven segments display come with an extra 8th segment that is used for displaying decimal points and others can have extra segments for certain characters or symbols
Applications of 7 Segment Display
- Here main applications of 7 segment display re-explained
Digital Clocks
- 7 segment displays are mostly used in digital clocks for time display
Counters
- It is also used in counters to count the display
Thermometers
- It is used in thermometers to display the temperature.
Speedometers
- It is also part of speedometers to display
Advantages of Seven Segment Displays:
- Seven-segment presentations are normally modest and need the least components to operate as compared to different LCDs or LED.
- Seven-segment displays have high preservability also in low-light modules since they are used for high-contrast light in certain uses that are not difficult to work.
- It is long term operating device that is used in devices that operate under different temperature values and mechanical pressures.
Disadvantages of Seven Segment Displays
- It only shows digits and characters, which make its uses limited for some uses.
- It has limited survey points and it is difficult to show certain points.
- It uses more power than different display devices as they generate light regularly which can affect devices.
- it has limited customization.
Conclusion:
An electronic device’s 7-section display is simple and effective technique to display numbers and characters. It is created with 7 LED segments that are denoted as A, B, C, D, E, F, and G which are combined in the shape of the number eight. Common Anode and Common Cathode are 2 types of 7-segment displays that differ in how their anodes and cathodes are connected. Forward voltage loss, reverse voltage forward current, peak current, , power dissipation, and operating temperature are among the requirements for a 7-segment display. Digital clocks, counters, thermometers, speedometers, and other electronic equipment frequently employ 7-section displays.
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FAQs
What is the Definition of a 7-Segment Display?
It is a simple technique to show numbers and characters in electronic devices and it has seven LEDs arranged in a number 8 shape.
Write the Main Types of 7-Segment Displays.
There are 2 main types of 7-segment displays the first one Common Anode and Common Cathode.
How Does a 7-Segment Display Work?
If voltage is given to a certain LED segment of the display it will on and release the light permitting the segment to be seen. By turning on different segments, numbers, and characters can be displayed.
What are the Specifications of a 7-Segment Display?
- It has two modes of operation common cathode and common anode
- Its peak current is seventy milliamperes
- it uses thirty milliamperes of current
- it comes with a good and larger size display than LCD
- Its main colors are white blue red yellow and green
- its sizes are 9.14mm, 38.10mm,57.0mm 14.20mm,20.40mm, and 100mm
What are the Applications of 7-Segment Displays?
Its common applications are thermometers, speedometers digital clocks, counters,, and other electronic devices.
What is a 7-segment display?
The seven segment display is the type of electronic display device that shows decimal numbers that is an alternative to complex dot matrix displays. It is used in digital clocks, electronic meters, and other devices.
What is the 7-segment display algorithm?
The seven segments are used to show numbers. Provides an array of n natural numbers. The operation is to find numbers in an array that used fewer segments to show numbers. If any number comes with the least number of segments, the output number has a small index.
What is a DP 7-segment display?
It is an electronic display device used for displaying decimal numbers. Used for digital clocks and known as a seven-segment indicator,
Is 7-segment LED or LCD?
The 7 segment LED is a digital display module used to show numerical data. LED arranged in the shape of numbers provides easy seen display. They are known as “seven-segment displays” or “seven-segment indicators.
What is a 7-segment display, Arduino?
Normally 7 segment display is single unit that shows one digit or character. More digits are shown by multiplexing single unit 7-segment displays with each other to make two digit display, 3-digit display or 4-digit 7-segment display. It is easy to interface Arduino and 7 Segment display together
How many segments in a 7-segment display?
The 7 segment display is an electronic device that comes with 7 LEDS configured in a rectangle shape. Every LED is known as a segment that is configued to one of the terminals A through G.
How does a 7-segment display decoder work?
The 7 segment decoder that comes with 4 input lines and 7 output lines (a, b, c, d, e, f, and g) gets this BCD (A, B, C, and D) input. The output is given to 7 segment led display that has a decimal number based on inputs.
How to make 7-segment LED display?
In circuit every anode terminal of the common cathode LED display is configured directly to 4511 decoders through a curent limiting resistor. The cathodes of every LED is internally configured with ground. The binary inputs A, B, C, and D with 4511 are via 4 mechanical ON/OFF switches.
Category:Electronic TutorialBy Scott SpencerApril 29, 2023Leave a comment
Author:Scott Spencer
I am professional content writer have professional degree in engineering. I have worked in different famous companies and also providing technical and seo based services clients all over the world. With that i am sharing my knowledge to engineering and technical students and new learners to enhance their learning and get new ideas in technical fields.Follow him on Twitter and Facebook.
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