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Questions tagged [7segmentdisplay]

A numeric display consisting of seven segments per digit, allowing characters 0 to 9 to be displayed by selecting which segment is on or off. Can have each digit independently controlled, or can be multiplexed to reduce pin count. An 8th segment can be included for a decimal point.

Typically referring to LED or LCD displays where 7 segments can be combined to display a numeral between 0 and 9. LED Displays may be arranged as either common anode or common cathode, with independently broken out pins, or multiplexed to reduce pin count.

Typical arrangement of segments:

enter image description here

Another representation of the 7-segment character showing pinout, circuit diagrams for common anode models and common cathode models:

enter image description here

(Source)

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Why does the seven segment display have decimal point at the right?

All the seven segment displays I’ve seen so far have their decimal point to the right of the main digit. Why is this so? A decimal point to the left will be able to represent more possible combinations of numbers. A single digit display with a…
Atom
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How to drive a 12V common cathode 7-segment display with 5V signals and BJT transistors?

I'm having trouble designing a driver for a large (5") 12V common cathode 7 segments display using a 74HC595 shift register and BJT transistors. Below are the schematics for the component (display) I want to drive. (source: soldafria.com.br) I…
Ricardo
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How to "unground" a low state of a not gate

I have a seven segment display(LTS4680AE) and the anode of each segment keeps getting grounded. So I basically have a 4 bit adder which adds two 4 bit numbers and produces a 4 bit output. This output is connected to the input of a 4x16 decoder.The…
zack1544
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Implementing 7-Segment Display Transitions

I'm working on a project that involves displaying the following words on three 7-segment -displays. A S U F O E C S E F U N Each word should transition to the next after a one-second interval (I know how to implement this). I made it by creating a…
Michael
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7 segment display input inverted

I was going through the tutorial in https://www.101computing.net/bbc-microbit-counter-using-a-7-segment-display/ using a 7-segment display I got from an electronics shop about 10 years ago. Everything works except that the signals are…
cup
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How to connect multidigit 7seg common anode/cathode display to cascading shift register?

How can I connect this type of 7 segment display to cascading register like 74HC595? I know I can use 7219, but at the moment I have those cheap registers and would like to see if it's possible. Not looking for MCU scanning solution! The problem…
Pablo
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DIY LED panels with even illumination?

This is an electro-optical question. I'd like to make my own large 7-segment-type displays using discrete LED devices. What's a method to get an clean, even illumination of the segment from the LEDs (one or more)? Ideally, there's a good general…
payne
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Seven Segment problems,voltage and current

I want to ask a question about a project I am making, I am using a seven segment. Here is Information about the seven segment: http://www.4project.co.il/documents/doc_188_54.pdf I want to use this seven segment but when I read about it, it said that…
Abed
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7 segment display flickering when using switching power supply

I have two 4 digit seven segment displays that work perfectly fine when I use the LM7805 however, when I use the switching power supply, some segments sometimes flicker on their own. Can anyone please explain to me why this happens and how can I fix…
Andy Graddis
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Improvements to 7-segment decoder

I am just learning to build circuits, and I thought I would try my hand at building a 7 segment decoder using just logic gates. I drew the following schematic in Logisim, and it works, but there are a lot of chips to implement. I don't have a…
Ted Lowery
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How to display a double digit decimal value on a seven segment display?

I recently finished a 4 bit adder project and I wanted to "extend" it.Right now,the output is represented by 4 led's(1 for each bit).I want to display the answer as a decimal in a seven segment display.The biggest value that the adder can output is…
zack1544
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How to show excess-3 on a seven segment

I want to make an excess-3 adder and an excess-3 subtractor using two 4-bit binary adder (the inputs are already in excess-3) and then show the results in excess-3 on a seven segment. For example, 2+7=9 we have 0101+1010=1100(after subtracting 3…
gia
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Determining pinout on this Seven Segment Display

I have a seven segment display with 14 pins on each side and three digits. The display include a decimal point. However, I'm struggling to figure out the function of each pin. This item is described as a "3-digit Common-Cathode Display". I'm…
user1833028
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Driving 7segments display with CD4511

I'm looking into making a 7 segment LCD display (runs at 7.4 V) powered by a car battery. In order to do it I'll use a CD4511, since it can handle up to 18V. But upon reading the datasheet, I did not quite understand which is the appropriate input…
Rafael Mattei
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How to control the brightness of this 7 segment LED display?

This is how I tried to connect a BT-M512RD-DR1 LED panel, but it doesn't really work. This is the datasheet. Basically I have just used 2 wires of the 10 k\$\Omega\$ potentiometer. There is no change in brightness. So again, the question is - what…
Pablo
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