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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8-bit binary to BCD decoding for three 7-segment displays
I've created a circuit that uses both binary and BCD counters to convert an 8-bit binary number into three BCD numbers, which then feed into BCD to 7-segment decoder chips, and finally to common-anode ...
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Driving a Strange 12-Pin, 7-Segment, 4-Digit LCD display
I am putting together a project that requires a 4-digit numeric display and wound up ordering this. Unfortunately, something I completely failed to notice when ordering the LCD was that its pin ...
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Display 7 segment HDSP-N101
I'm new in electronics and I have a doubt. Recently I bought a 7 segment display to practice with Arduino, but I don't know how it works. I have searched at the Datasheet:
I suppose that my display ...
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7 segment led light up specific decimal point
I have a 12 pin 7 segment led (ATA8041AB) which is working fine using my code, it just that when I try to light up the decimal point led, it either light up all dp or dont light up at all.
here is ...
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Where can I find a datasheet/info of/on this "music speakers" 35 segment LED display with 7 legs? [closed]
Bought some "music speaker" thingies, some with bluetooth and some without. They are cheap, for sure, about 3 or 4 euro's. With some capacitor tweaks, they seem to be very plausibel to use (why is the ...
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Max amps/volts for a 7 Segment LCD
I recently bought this LCD screen for a project:
https://www.jaycar.com.au/4-digit-field-effect-lcd/p/ZD1886
This LCD screen is just for testing at the moment, the final project will use these (I ...
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Having an issue connecting two 4-bit Synchronous Up Down counters
That's a Traffic Light circuit I designed on Multisim. I used 2 74LS191 Counters, 2 74LS47 Decoders, 2 Seven Segment Displays, a 555 timer and a J-K flip-flop as you see.
It should count from 29 down ...
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Create time counter with display with capacity for several hours
I am rather new to this and as part of a hobby project I'd like to end up with a simple display showing a time counter. Starting at 0 and going up from there, being able to support several hours (so ...
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8 bit code in 7 segment display without splitting into four bit [closed]
How to connect two 7 segments display to display 0 to 99 number by sending 8 bit code ( without splitting code into 4 code ) using 7447 ic?
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7-segment decoder RBI/RBO pins
I know that RBO/RBI pins are used to blank leading zeros in a multi-digit display, but I've never used them once. How do they work? I mean If I ground an active low RBI pin, does that automatically ...
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How to drive a 9V common cathode 7 Segment using Arduino and transistors?
I want to make a 4 digit timer with 9V CC 7 segment using arduino.
I tried the circuit below to switch the segments.
simulate this circuit – Schematic created using CircuitLab
The segments ...
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One digit on seven segment display not working
So I have a circuit using the 4510 and 4511 chips as well as 3 seven segment displays on a PCB (designed and created). What it is meant to do is count up to 9.99 in 1's, 10's and 100's by cascading ...
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Detecting Switch input in ARM 7 and multiplexing two seven segment displays
I am trying to multiplex two seven segment displays, once a switch input is detected.
If a switch is pressed then the seven segment displays should show 1
If ...
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Two multiplexed 7-segment displays flickering
I'm working on a temperature sensor.
I've got:
LM35 (Sensor)
LM741 (Op-amp to amplify LM35 Vout to 5V)
PIC 14F458
The temperature is shown on two 7-segment displays with only one BCD converter (...
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power supply noise causing resets of MAX7219 LED driver
I have wired up an ESP8266 wifi uC to a MAX7219 7-segment driver. The setup works well, except that the circuit seems susceptible to external noise. The main issue I have noticed is that activating a ...
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7 segment LED display multiplexing for 9 digits
I want to build a 9-digit 7 segment LED display with basic components.
I am planning to use a 4-inch 7 segment LED display and an Arduino board for my application.
According to my understanding, I ...
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What is the use of this 2-digit 7 segment display
I just came across this weird device while searching for a 2-Digit 7 segment display with an inbuilt BCD decoder. This is because I am using an MSP430G2553 with limited number of GPIOs with few ADCs &...
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How to create an output for LED brightness control using PWM in PIC
A PIC is multiplexing multiple common anode 7-segment displays.
An LED driver is being used so PIC does not have to source/sink a lot of current.
To help with multiplexing, each 7-segment display ...
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Can the SN54LS47 BCD to 7-segment display driver sink current of a full 7 segment display
The datasheet of the Texas Instruments SN54LS47 says that this part is for use with common anode 7-segment displays on pg 3 para 1 of the datasheet.
Common anode dispay is where all the segments are ...
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segment on 4 digit 7 segment not displaying
Segment E on digit 3 has stopped working for some reason. It was working fine when I first got but just recently stopped working. This segment displays fine on the other digits except digit 2, that ...
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Resistors of 7 Segment display [closed]
I'm trying to understand 7 segment display, In the picture below there is a resistor for the GND pin of the 7-segment display, My question is why it needs a resistor?
Because the other display pins ...
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How do I display a certain character on a 16-segment display?
I'm trying to display my name on 16-segment displays and I know that each pin corresponds with one segment. The problem is it is too much work to derive the pin assignments for each letter since there ...
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Driver for a 2 digit 7 segment display [closed]
I have two 7-segment displays (datasheet here). They are common cathode. The forward voltage for each segment is 2.0 V. The continuous forward current is 25 mA. What I'm looking for is a relatively ...
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Why does this 7-Segment Display not function properly?
I've provided details in image.
Although, I'll once again provide in text:
IC : 74LS47N (Binary to 7-Seg Display)
7 Segment : Common Anode
M.S.B : D
L.S.B : A
This ...
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Why does this 7-segment display not light up?
Why this (IC7447 and 7 -Seg combo) not light up?
I'm not sure as if what to do of the 3 lines of the IC7447 (Pin - 3,4,5) which I've depicted in GREEN below. Because at certain sites they have been ...
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Does my 7 segment display need a bypass capacitor?
I have circuit that includes various 74HCxxx series logic chips. Four of the logic lines represent a 4 bit number and I have a 7 segment display used to show the value of that 4 bit number. I use an ...
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How do I check the functionality of a 4511 x 7 segment display? [closed]
So this may sound so stupid but I can't find whats the problem. I have created 7 Segment display with BCD and my 4511 Decoder Driver is getting too hot.
I checked if I have short circuited but I ...
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Reverse engineering 7 segment display
I ran into a problem with one of my hobby projects and at this point I need some help. I'm attempting to sniff the signals going into a 7 segment display and use them for a purpose.
The display is a ...
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2.4 ghz RF radio and antenna - nrf24 underneath a 7-segment display
I have this tiny nrf24 module that I want to use underneath a 7-segment display.
How much will this affect the range and the quality of the radio signal?
I have done a lot of research and testing on ...
user83582
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Converting 7-Segment Display output to binary
I know this is very unusual but I need it. A PLC has outputs to drive 7-segment display. However, I have a new device that works only with Gray Code or Binary. This new display and the old 7-Segment ...
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7 Segment LED - What is the difference between driving 1-digit and driving 4-digits?
I read a few threads explaining how to drive a 1-digit (7-segment) LED correctly. After all, most threads recommend that I should connect 1 resistor for each segment (which make it the total of 8 ...
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Charlieplexing 7-segment display segments vs segment
I understand the principle of charlieplex and the use of tri-state. What I don't understand is, can I light all segments on a display at once or do I have to light one segment at a time?
Say I have 8 ...
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7 Segment Common Cathode LED Digit Display Circuit for Arduino
For the first time I am going to make a digital clock with 7 segment displays with Arduino Multiplexing. I am about to use the following circuit to run 4 large Common Cathode 7 Segment LED Digit ...
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How do you convert a number to its 4-bit binary equivalent using logic gates?
Circuit storing number as binary
]2
My aim is to store numbers from 0-15(4 bits) as binary. The numbers are inputted using a keypad with buttons labelled N0-N9.
The circuit works for single digit ...
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How to identify pinout of 7 segment display when data for it is not available online?
I found some 1-character 7-segment LED display in my toolbox with unusual pinouts. There is one however I can't seem to figure out and I even googled the part number with no results.
The part number ...
user116345
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Why did my LED resistor burn while lighting four LEDs in series?
I have tried to create a circuit to switch a large 7-segment LED display (LDS-CD16RI) using a pair of MOSFETs, as follows:
simulate this circuit – Schematic created using CircuitLab
Here I am ...
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Array of 4x7 Segment displays using demultiplexer. Need PNP transistors!
My first post here! I'm that most dangerous of EE-wannabes—a software guy with theoretical knowledge: V=IR, and transistors come in two flavours: "NPN" (1=On) and "...
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I want to create a custom LED segment display. What do I need to study? [closed]
I want to create and then order a small run of a customized mass-produced LED segment displays for an art project. They will use PWM. It is not much more complex or detailed than a 7 or 16-segment ...
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how to determine resistor value calculation for common anode 7-segment display multiplexed
Resistor is required to limit the current flow through the LED since otherwise so much current will pass through that power dissipation shall destroy the LED in less than a second.
For nonmultiplexed ...
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Driving large common anode 7 seg LED with NPN transistor and arduino, worked but is it the right way?
I'm newbie, the circuit designed myself for driving large LED worked but I'm not sure is there better ways? I have only NPN transistors and common anode 7 segment display.
Thank you.
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Display Double Digit Numbers on 2 seven segment displays
I'm making an Arithmetic Logic Unit(ALU) for an assignment and I'm on a point. So according to my circuit design on the link shared below, I am able to output 1 digit of my alu. It is a 4 bit ALU so ...
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Why can a 74HC595 drive 8 LEDs?
I don't understand, I have seen many people use the 74HC595 to drive 5V across 8 5mm green LEDs via 220Ohm resistors at the same time, whereas the datasheet says that the maximum Vcc current is 70mA. ...
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NPN or PNP for multiplex seven segment display?
I want to put three multiplexed seven segment displays on a pcb module which then will be connected to another board through a 1x12 Pin header housing an ATMega (so assume in the following that Pin 11 ...
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LED radio display - How to control multiple segments at a time?
I have a display from an old radio (I think it was a Watson).
Now, there are different wires connected to it: Let's call the first two A and B and one of the others (it seems to be not so important ...
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converting an analogue signal to be viewed on a 7 segment display
How do I convert an analogue signal to a digital signal and display it on 7 segment LED's. This must be done without using any programmable micro-controllers.
It's for a school project. The analogue ...
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Arduino based clock with 4 pieces 4" 7 Segment LED Displays [closed]
I was going through multiple tutorials on how to create an Arduino clock with 7 segment displays. I planned to build one and purchased 4 large (4 inches) 7 segment 1 digit displays. The displays run ...
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Using 7-Segment Display on pic18f
I want to show a decimal number between 0-99 on 7-segment display by using 2 push buttons. These buttons will be used for incrementing and decrementing the number on display. I'm using pic18f assembly ...
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MAX7221 experiencing 40C temperature rise above ambient
Each MAX7221 (2) in my current design is getting very hot. I used the FLIR One to get a general measurement. I observed a 40C rise above ambient. I'm not sure what the root cause is. Perhaps ...
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BCD to 7 Segment is producing too little voltage
I am trying to use a BCD to 7 segment decoder to power my 7 segment display. This is the decoder I'm using (http://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS47N/?qs=...
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Increase voltage from 5 to 12V to deactivate a display
I'm developing a timer based on this project: Digital Stop Watch with ATmega8 by Avinash Gupta (I cant put the link, because my reputation is too low)
Original schematic:
At first, I made the same ...
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