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.

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Strange Results With a 3x7 Segment LEDs

I'm trying to get a CPS03631BR 3 digit 7 segments LEDs to work. I've wired it to my Arduino UNO like this: And I'm using this code, which should light all the LEDs digit-by-digit, then light ...
Nathan Campos's user avatar
2 votes
1 answer
437 views

How to drive this 7 segment led?

Is there a single IC solution which will act as serial parallel driver for this 7 segment led
Pablo's user avatar
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LCD modules with I2C or SPI interface [closed]

I would like to add an LCD to my current design (a project that is to be produced in low volume, around 50 to 100 units). A small display size (around 8 or 16 characters) should be plenty since it is ...
boardbite's user avatar
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2 votes
1 answer
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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 ...
payne's user avatar
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How to connect this 7 segment LED display to Arduino?

I have the following LED display, which I want to hook up to Arduino UNO. According to datasheet, there is clock pin. Do I have to build external clock source for it or I can feed it from Arduino? ...
Pablo's user avatar
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1 vote
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Can a CD4056BP drive an LED display

I bought some 7-segment LED displays along with some BCD-7 segment decoders. The clerk said he didn't have the exact part I asked for and instead gave me a Texas Instruments CD4056BP. He said it was ...
bhillam's user avatar
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2 votes
4 answers
19k views

Logic gate counter on 7 segment display

Using logic gates with general purpose transistors, I want to display numbers on a 7-segment display depending on the 2 pushbutton input. If both buttons are not pressed, I want it to say 0. If 1 is ...
skyler's user avatar
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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 ...
Andy Graddis's user avatar
2 votes
6 answers
8k views

How do I exchange LCD display with 7-segment LED's?

I have bought a cheap radio controlled clock, and I want to make a hack that replaces the existing LCD display with 7-segment LED's. With my voltmeter in AC mode, I can measure voltages(with respect ...
hpekristiansen's user avatar
1 vote
2 answers
442 views

Do I need to solder on my DE2 board to replace a broken segment?

I've already posted a question here about this when I realized that all things were not right with my Altera DE2 board: Is this display broken or is it a bug? After verifying that the segment indeed ...
Niklas Rosencrantz's user avatar
2 votes
1 answer
2k views

Multiple 4-Digit 7 Segment Displays with Arduino

I have 3, 4-Digit 7-Segment Displays from Adafruit, and the included docs/ libraries say I should connect the display to pins A4 & A5. However, I have three of the displays, so I am looking for a ...
Andrew's user avatar
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6 votes
2 answers
2k views

Multiplexing 2 digit 7Segment with one Bit

I want to control a 2 digit 7-segment LED with a MSP430 micro controller. The display has 8 input pins per digit (8th pin is the dot, which I do not need) and two ground pins (common cathode). The ...
A.Schulz's user avatar
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3 votes
3 answers
11k views

Driving a large 7 segment display using a micro-controller

I need to drive a large seven segment display (segment length is a about 2 inches) using a micro-controller (PIC 16F877). I've driven normal seven segments directly from PICs without issues, but I ...
Anubis's user avatar
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6 votes
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Multiplexed Display

Need to develop a user display for a home appliance with: Two digit temperature display (Seven Segment). Four LEDs for 'Power ON' and three 'Modes of Operation' of the appliance. I came across a ...
Sohail's user avatar
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7 votes
4 answers
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4026 + 7-segment display: do I need transistors?

I'm a beginner and, as an exercise, I'm building a digital clock using without a microcontroller. The main IC that I'm using is a 4026, which counts and converts do 7-segment led format. The leds in ...
André Wagner's user avatar
4 votes
5 answers
5k views

Why is there a delay in a common anode 7-segment display?

I have a common anode 4-digit 7-segment display. I have each segment cathode connected to a 330-ohm resistor, and the resistor is connected to a shift register. Each segment cathode is connected to ...
blake305's user avatar
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1 answer
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Inexpensive Frequency Counter and Display for clock generator

I have the desire to add a frequency display for a clock generator. Certainly not necessary, I can use my DNN, but it would be nice, I found a veritable plug & play frequency counter and LDC ...
rdivilbiss's user avatar
9 votes
1 answer
21k views

Using 4 digit 7 segment LED

I have a 7 segment display that has 4 digits. What will I need to make use of this? Can a single microcontroller handle the operation? I mean PIC16F690...I saw also a MAXIM chip that drives these kind ...
Dumbo's user avatar
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2 votes
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Need details on 35-year old Unisonic VFD (from a calculator)

I have a very old Vacuum Fluorescent Display that I took out of a Unisonic Calculator, that I'd like to resurrect in a clock. It's a cylindrical glass tube, about 4 inches long and 1/2 inch wide - ...
The Programmer's user avatar
2 votes
2 answers
2k views

Can't figure out this seven segment display

I recently bought four of these seven segment displays: http://www.electrokit.com/en/leddisplay-7segment-58mm-red-green-ca.49450 I'm having no luck however to make it to work, and since there is no ...
monoceres's user avatar
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7 votes
3 answers
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Improving brightness of multiplexed 7-segment led display

I have a two digit 7-segment LED display which is driven multiplexed by a microcontroller. PORTA is for the anodes. In my code I shift a 1 through ...
arminb's user avatar
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44 votes
5 answers
7k views

Why do 7 segment LED displays break apart when I brush my teeth?

This question might sound silly, but it is very serious (although geeky, I must admit). When I use my electric toothbrush in front of my alarm clock (one of those with a big red LED display), the ...
Max's user avatar
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4 votes
6 answers
11k views

How to power 24 7-segment displays with Arduino?

I'm working on an Arduino project where I need to power 24 7-segment displays (model Kingbright SC56-11YWA). I decided to control them using 8 bit shift registers (model 74LS164N). This is ...
Dyte's user avatar
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3 votes
1 answer
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LED Driver IC STLED316S

I am struggling with reading the datasheet for the STLED316S 7-segment/Discrete LED driver IC. I'm writing code for an STM32 chip, but also using Arduinos as well. I'm having no problems writing the ...
PatchedUp's user avatar
3 votes
2 answers
4k views

Arduino + Max7221 + Common anode 4-digit 7-seg LED array?

I'm trying to hookup a common anode 4-digit 7-segment LED array to my Arduino via a Max7221 IC. Here's a hard-to-see (sorry!) pinout for my LED array (my LED array is the bottom common anode one, ...
Michael's user avatar
  • 53
0 votes
1 answer
840 views

Multiplexing segment LCD

I have a segment LCDs of 29 segment and a single BP. I can display the digits as i wish with a 40 Pin PIC microcontroller. But now my problem is to multiplex two LCDs of above type, so that i need ...
Saneesh A T's user avatar
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2 votes
4 answers
8k views

Binary to BCD converison

I have an 8-bit number that the values ranges from 0 to 99. I need to convert that to a proper 8-bit BCD representation of the number using digital circuits. In case you need to know, the original ...
Sednus's user avatar
  • 183
1 vote
1 answer
4k views

Creating a one-digit scoreboard using logic circuits

I'm creating a one-digit scoreboard on a breadboard. Naturally, I have a BCD to 7-segment decoder and a 7-segment display. But I don't know how to automatically increment the display. (It's for a game,...
skytreader's user avatar
0 votes
2 answers
1k views

Linking two 4511's to drive two independent seven digits displays

I kind of remember to had linked two seven digits displays. using a single 7 bits output with two 4511's linked together, but can't find nothing about that in Internet. The only way I had found is ...
levhita's user avatar
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4 answers
10k views

Is it possible to drive 4 seven segment display with MSP430G2231?

I'm trying to teach myself electronics and my goal is to create a digital clock with 4 digits. I have an MSP430G2231 which has only 8 available ports as far as I can tell. I saw some methods for ...
frbry's user avatar
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5 votes
4 answers
2k views

What's the best way to connect a 4-digit 7-Segment LED to Atmega168

I'm working on a device with a 4-digit 7-segment counter and wondering what is the best way to drive all the LEDs. Right now I have a custom PCB that's driving them all from an Atmega168, using most ...
user4101's user avatar
5 votes
7 answers
2k views

Binary coded decimal ICs

Is there any IC that can be use to convert 9 bit binary code to seven segment display? EX: 100101100->300 I want to display 300 in seven segment display when 100101100 binary code applied to input.I ...
hisker's user avatar
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1 vote
7 answers
2k views

7 Segment Display - Hiding the electronics

I'm building a basic thermometer that displays the temperature on 4 seven segment LEDs. I want to put the circuit in a box with a clear plastic lid. I'll mount the LEDs on the PCB around the other ...
BG100's user avatar
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4 votes
2 answers
1k views

Need help finding smallest possible 8 digit 7 Segment LCD TN Display

I can find a number of LCD TN 8 digit 7 segment displays but they are far to big. The kind of size I'm looking for is the ones you usually find in mini calculators. The size im looking for is around ...
Scott's user avatar
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4 votes
1 answer
7k views

MAX7219 Arduino Issue with 7 Segment display

I have followed the tutorial here MAX7219 Now when i wire it up to a 4 Digit 7 Segment display, and run any code changing the display I get all the segments on all digits lit up ...
Ashley Hughes's user avatar
2 votes
3 answers
1k views

I2C 7seg driver

Does anyone know of any good I2C 7segment display drivers. I swear a previous answer referenced a chip for this on chiphacker but I cannot find it. I would also be happy with SPI, but I I2C would ...
Kortuk's user avatar
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