7 Segment LED Display

A 7-segment display is a type of electronic display device which is simple to drive and has a low power consumption, It is commonly used to display numerical information. It consists of seven individual segments that can be illuminated to create numerical digits.

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7 segment display, also known as a "seven segment display," is made up of seven LEDs arranged in a rectangular pattern, Each of the seven LEDs is referred to as a segment because, when illuminated, it forms part of a numerical digit (both Decimal and Hex) to be displayed.

When two or more 7-segment displays are connected together to display numbers greater than ten, an additional 8th LED is sometimes used within the same package, allowing the indication of a decimal point, (DP).

Each of the seven LEDs in the display is assigned a positional segment, with one of its connection pins protruding from the rectangular plastic package. These individual LED pins are labelled from a to g, one for each individual LED. The other LED pins are wired together to form a common pin.

As a result of forward biassing the appropriate pins of the LED segments in a specific order, some segments will be lit and others will be dark, allowing the desired character pattern of the number to be generated on the display. This allows us to show all ten decimal digits from 0 to 9 on the same 7-segment display.

The common pin on the seven segment display is typically used to identify the type of 7-segment display. Because each LED has two connecting pins, one for the "Anode" and one for the "Cathode," there are two types of LED 7-segment displays: Common Cathode (CC) and Common Anode (CA) (CA).

Digital clocks, electronic meters, basic calculators, and other electronic devices, sensors that display numerical data commonly use seven-segment displays.


7 Segment LED Display Prices in India

7 Segment Display type


TM1637 4 Digit 7 Segment LED Display

Rs. 59/-

7 Segment Led Display (Common Cathode)

Rs. 8/-

7 Segment Led Display (Common Anode)

Rs. 12/-

10 Bit WS2812 5050 RGB LED Driver (Pack of 5)

Rs. 99/-

10 Bit WS2812 5050 RGB LED Driver

Rs. 2268/-

TM1637 4-Digit Display + IR Proximity Sensor

Rs. 227/-


How does a 7-segment display work?

Light Emitting Diodes (LEDs) are used in seven-segment displays to emit light energy in the form of photons. The production emits light in all seven segments to display digits, with the eighth segment serving as a decimal point.


Why it is called as 7 segment?

The 7-segment display, also known as the "seven-segment display," is made up of seven LEDs (hence the name) arranged in a rectangular pattern, Each of the seven LEDs is referred to as a segment because, when illuminated, it forms part of a numerical digit (both Decimal and Hex) to be displayed.


What are the advantages of 7-segment display?

The advantages of 7 Segment display are : 

  • It only contains LEDs, 
  • The entire 7 segment display module is very inexpensive. 
  • 7 segment displays in general, are extremely efficient. 
  • The heat dissipated by these displays is very low, which extends the life of the devices.

What is common cathode?

The term "common cathode" refers to the fact that the cathodes of all LEDs are connected to a single pin. Each LED's anode has its own pin. So driving one of these entails sending a current from the desired segment's anode (positive) pin to the common cathode pin.


How many pins are in a 7-segment display?

A seven segment display is a ten-pin electronic circuit. Eight of the ten pins are LED pins, which are left unconnected. Two pins in the middle are common pins that are internally shorted. Seven segment displays can be classified as common cathode or common anode depending on whether the common pin is cathode or anode.


What is common anode?

The term "common anode" refers to the fact that the anode (positive) side of all LEDs is electrically connected at one pin, while each LED cathode has its own pin. To turn on any particular segment, a current must be run from the common anode (positive) pin to the cathode (negative) pin for the desired segment.


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