Questions tagged [oled]

An OLED (organic light-emitting diode) contains a film of organic material that emits light when current is applied. They may be used to create digital displays that do not require a backlight giving a deeper black level and higher contrast than LCD displays.

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STM32 Nucleo f401RE 1.44 inch OLED ST7735

I try to drive ST7735 OLED display with nucleo board. I worked with a ready-made example I found on the internet, but I could not print anything to the screen. When I compile my code, I don't get any ...
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OLED screen not working when I change code on Arduino from 128x32 to 128x64

I am having an issue with my new OLED screen (128x64). I was using the SSD1306 driver to run an OLED screen 128x32 screen without any issues with the Arduino. Then I swapped out the screen with a ...
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Could providing 3V instead of 3.3V have damaged my OLED Screen Module?

I'm a beginner trying to attach an OLED screen module made by Waveshare (schematic, datasheet of OLED screen) to my nRF5340 DK devkit (schematic sadly only available as part of a .zip file here) via ...
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SSD1327 OLED-driver C-library

Since a pre-made I2C C-lib for the SSD1327 does not exist anywhere, I'm trying to create one by hand for the STM32 HAL without ...
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Refresh synchronisation with an SSD1322

Question: Is it possible to determine when the SSD1322 OLED driver module is "between redraws" of the screen? I'm thinking in a similar way to how game consoles/PCs are able to wait until ...
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How to supply an OLED module with 13V?

I have an OLED module that uses 3V for logic signals and 13V for the LEDs. What is the common way to drive the 13V for OLEDs? With a regulator or some kind of special LED driver? I have seen some LED ...
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understanding inductor parameters when choosing inductors

I need a voltage regulator to drive an OLED display with 13V/ 50mAmp. I have 3.3 Volt to feed it with. I am thinking of using this boost regulator (because it is cheap): regulator This regulator(...
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Why do IPS/OLED need to be covered with glass when e-paper does not?

I wonder why the major criteria of comparison of IPS/OLED displays is how reflective they are, but e-paper seems just to "enjoy" direct incoming light without that side effect. I've tried ...
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Wiring a SSD1306 OLED with SPI

I have this SSD1306 OLED display, and I'm trying to figure how to connect it to my NodeMCU with SPI. It looks like this: I browsed several sites, and I could see that the SCK is the clock, SDA is ...
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SSD1351 PMOLED display pixel color affected by other pixels on the same row

I am currently writing software that makes use of a SSD1351-based display (from Waveshare). I have noticed an issue most visible with a dark blue background: when some brighter colors are on the same ...
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Changing the I2C address of a different type of OLED display

I am working with 2 OLED displays. Both use the SSD1306 chip which has interchangeable addresses. One chip looks like this : This chip has a clear indicator on what to connect to change the I2C ...
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What determines the current consumption in LEDs?

I analyzed some data obtained for some experimental LEDs, and I have asked myself why in some LEDs, the current and current density is higher than others. Obviously, I am using different materials ...
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Can't connect SSD1327 I2C

I just recieved 2 OLED displays SSD1327 128x128 16bits, 1.5", but I can't connect them to my arduino uno R3. I first tried with the Adafruit library, set the address 0x78 as printed on the ...
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How to write simple text or display image on the SSD1322 OLED display

As anyone been successful to display a simple text or a grayscale image to the OLED display using the SSD1322 controller like the Newhaven Display 25664? I have managed to initialize the display using ...
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WAVGAT Arduino Pro mini I2C pins?

I'm trying to hook up an OLED display using I2C communication to my Arduino Pro Mini clone(with ATmega 168, 16MHz) from WAVGAT but I can't figure out where the I2C pins are on the Arduino.
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Transform TFT to AMOLED

I was wondering if it is possible to transform a TFT LCD into an AMOLED as both are active matrixes. The composition seems to be similar. AMOLED TFT (LCD) And if it wouldn't be possible, could I at ...
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How is a TFT array made?

The more I get into TFT arrays, the more I'm lost. I know what it does, but how does it look like? Can you split a display and just hold a TFT? Can you buy a TFT on glass, without the rest of the ...
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Why OLED/AMOLED screen technology create ilussion colour?

OLED and AMOLED screen unit is pixel that made by three main LED colour. They are RED, GREEN, and BLUE. For other color, like YELLOW it combined from RED and GREEN. But, is it really combined? I mean ...
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Extension from OLED display to driver board

I have purchased this display for a prototype in development. Product: https://www.displaymodule.com/collections/oled/products/2-8-256x64-monochrome-graphic-oled-display-module-spi-mpu Datasheet: ...
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2 votes
1 answer
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How to compare OLED and LCD brightness

I am trying to build a night clock projector, inspired by this project: https://microengineer.eu/2018/05/01/diy-night-clock-projector/ As I am more a computer scientist than an electrical engineer, I ...
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Why are monochrome red OLED display hard to come by [closed]

It looks like the majority of monochrome OLED display modules available on the market are white, orange/yellow, green or blue. There seems to be only a very limited amount of red displays available. ...
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How to setup and use oled SSD1306 I2C screen(UG-2864HSWEG01) in proteus 8.8

i am trying to simulate an 128 x 64 I2C oled screen with arduino but cannot get to work. I am using the arduino compiler and the libraries adafruit gfx 1.1.5 and adafruit ssd1306 1.1.2 ( light size ...
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I2C OLED does not display properly

I am using a 1.3' 128x64 OLED display bought from a site I don't remember(probably no-name), using the SSD1306 drivers, with an Arduino Nano. I have connected the SDA->A4, SCL->A5, as indicated ...
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3 answers
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Why are graphic displays still so expensive? [closed]

As a new electronics enthusiast, I've been able to score a lot of components for very cheap, ranging from beefy MCUs in the 10$ ballpark to heaps of ICs for sub-dollar prices. However, buying a coffee-...
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PCF8574 and OLED SSD1306 I2C conflict

I have a ESP12 module which is connected to multiple I2C devices such as an 24C08 EEPROM, DS1307 RTC and a PC8574 expander. Everything works fine until I decided to add an OLED module to this setup. ...
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Are OLEDs in cell phone applications able to be restored?

OLED displays on cellphones have a display burn in, which creates colormetric non-uniformity in the display. Is this degredation recoverable? There are applications which display bright constant ...
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How do I connect display to board

I’m experimenting when some OLED displays similar to this and here’s the data sheet. My question is how do I connect the display to the PCB? I’m unfamiliar with the flat ribbon type cable and how to ...
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Why do LED/OLED HD and UHD displays have "global refresh rates"?

What is the benefit to scanning vs. individually addressing and updating lines or pixels or screen areas? Is there a standard interface to the majority of HD or UHD displays that allows the ...
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Drive 50 SPI oled displays with a single ESP32

i need for a logistics project to use A LOT of Oled Displays in the mezzanine warehouse to show some details about the items. Now, i want to use this base hardware and build around them the needed ...
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SSD1306 128x32 OLED Initialization problem

I'm trying to run the SSD1306 128x32 on a NUCLEO board. But I can't get the thing to properly initialize. This is my initialization sequence. ''' ...
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1 answer
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Adafruit SSD1306 Scrolling Function

So, there is a function in the Adafruit SSD1306 Library that prints a scrolling text. For examples, display.startscrollright(0x00,0x0F); will print a text scrolling towards the right. What are the ...
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SSD1306-based OLED display E/RD# and R/W# pins

This is the OLED display in question and this is the datasheet of the display. I am going to connect to it using I2C. The datasheet provides mostly understandable explanations for the pins as far as ...
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How to wire 0.91/0.86 inch display to i2c?

I have a 0.91 inch display with a 4 pin I2C connection. I then realised that I needed to use a 0.86 inch display with the connector in the above image. I have searched on google on this but nothing ...
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1 answer
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How to connect a Sparkfun LiPoly Charger to an Arduino Nano?

I was able to upload the Adafruit SSD 1306 OLED Library to an OLED Display using an Arduino Nano. Now I want to power the Arduino Nano via a Lipo Battery but the battery must be rechargeable and I ...
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OLED SS1306 displays on one side only when using AVR

I have an I2C 128x64 OLED display here. I've tried using Arduino and everything works flawlessly. Now I'm trying this but just writing in straight-up C code. Majority of the display is garbled up. I'...
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ssd1306 (30 pin) oled display eagle library

I am designing an electronic project in Eagle PCB software. The project having a 30Pin SSD1306 Oled Display. I searched in the internet for the eagle library and i cloud not find a matching one. The ...
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OLED ssd1306, "Set the Oscillator Frequency"?

I am working with a OLED SSD1306 and in the datasheet there is a parameter named "Set the Oscillator Frequency." It is a four bit value to adjust. I can't understand the purpose of this. Can ...
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Display Design - would combining OLED with a white source be more efficient?

To be clear, I'm not an electrical engineer, nor do I claim complete knowledge of how displays work. However, I have done research into displays (televisions, computer monitors, AMOLED phone screens)...
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1 vote
1 answer
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What could cause 45FPS limit for SSD1306?

I'm porting U8G2 display library to ESP32 microcontroller (no suitable tag) with ESP-IDF (its official platform) as the platform, I2C protocol for now, using SSD1306 display for testing. After all ...
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13 votes
2 answers
3k views

Why are OLEDs used in screens insted of LEDs?

I was trying to google this question and couldn't find any information. And from reading some info on how they work i didn't find any significant difference asides from OLEDs being made out of organic ...
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33 votes
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How do devices like the Game Boy Advance achieve their frame rate?

I've been designing my own handheld gaming device based around an AVR microcontroller and a small OLED display. I started off with a monochrome display 128x64 pixels and can comfortably draw to it at ...
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3 votes
1 answer
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How to power a OLED 128x128 display from 3.3v microcontroller board?

I recently purchased a small 1 inch OLED screen. In the datasheet, it shows the max power requirements as: Operation: 3.5v Logic: 2.6v IO: 3.5v Display: 13.5v I figure I can directly connect the ...
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Why aren't laptops with transparent displays a thing? [closed]

I just realized that the display on my 2012 Macbook Air is transparent. I had the screen brightness of the built in display on the lowest (off) while using an external monitor, and the sun came ...
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Terminology - VDD vs VSS?

What is the correct voltage terminology for VDD and VSS? I've been installing a Winstar WEH001602D OLED and was struggling until I realised that it appears to have pins 1 and 2 reversed compared to ...
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Passive reset circuit for multi-chip game design

I've been building a small handheld gaming device based around the ATTiny85 and an SSD1306 OLED screen. It's a very limited system and as such I needed to be creative about how I used the I/O pins. I ...
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1 answer
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HMI design industerial [closed]

I'm planning to design HMI for a product that i want to design. but, I've questions that I couldn't find answers to: 1- TFT or OLED screens, are they reliable? do they last for > 10 years? (ok, yes ...
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609 views

ssd1306 registers

I got confusion while reading datasheet of the OLED display(128x64).I do not understand why to use two column start registers. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
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Send a single pulse low/high pulse then stay high

I have a small OLED display that I'd like to drive with an ATtiny85 micro controller. The OLED is the 4 wire SPI type, with no CS. It has a Reset pin that is required to be pulsed low-high at power on ...
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2 answers
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SSD1306 128x32 Connector

What's the name of connector which can be used here? I know that I can always solder it to PCB, but I was looking for more "elegant" solution, and I remember seeing these connectors before on PCB's ...
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Connecting an Arduino oled display without a breadboard

I am new to Arduino and over all electrical and computer engineering. I need some help with connecting an OLED display to my Arduino. The problem is, I do not currently have a breadboard. If I need a ...
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