Monochrome 128x32 I2C OLED graphic display

SKU: ADA931 Brand: Adafruit

Retired Product

Search for an alternative

This product has been retired. It is no longer available, but this page has been kept for reference.

These displays are small, only about 1" diagonal, but very readable due to the high contrast of an OLED display. This display is made of 128x32 individual white OLED pixels, each one is turned on or off by the controller chip. Because the display makes its own light, no backlight is required. This reduces the power required to run the OLED and is why the display has such high contrast; Adafruit really like this miniature display for its crispness!

The driver chip SSD1306, communicates via I2C only. 3 pins are required to communicate with the chip in the OLED display, two of which are I2C data/clock pins.

The OLED and driver require a 3.3V power supply and 3.3V logic levels for communication. To make it easier for Adafruit's customers to use, Adafruit have added a 3.3v regulator and level shifter on board! This makes it compatible with any 5V microcontroller, such as the Arduino.

The power requirements depend a little on how much of the display is lit but on average the display uses about 20mA from the 3.3V supply. Built into the OLED driver is a simple switch-cap charge pump that turns 3.3v-5v into a high voltage drive for the OLEDs, making it one of the easiest ways to get an OLED into your project!

Of course, Adafruit wouldn't leave you with a datasheet and a "good luck": Adafruit have a detailed tutorial and example code in the form of an Arduino library for text and graphics. You'll need a microcontroller with more than 512 bytes of RAM since the display must be buffered.

You can download Adafruit's SSD1306 OLED display Arduino library from github which comes with example code. The library can print text, bitmaps, pixels, rectangles, circles and lines. It uses 512 bytes of RAM since it needs to buffer the entire display but its very fast! The code is simple to adapt to any other microcontroller.

Technical Details

Datasheet, EagleCAD PCB files, and Fritzing available in the product tutorial

Dimensions:

PCB: 20mm x 35mm (0.8" x 1.4")
Display area: 7mm x 25mm
Thickness: 4mm

Display details:

Diagonal Screen Size：0.91"
Number of Pixels：128 × 32
Color Depth：Monochrome (White)
Module Construction：COG
Module Size (mm)：46.30× 11.50 × 1.45
Panel Size (mm)：30.00 × 11.50 × 1.45
Active Area (mm)：22.384 × 5.584
Pixel Pitch (mm)：0.175 × 0.175
Pixel Size (mm)：0.159 × 0.159
Duty：1/32
Brightness ( cd/m2)：150 (Typ) @ 7.25V
Interface：I2C
Display current draw is completely dependent on your usage: each OLED LED draws current when on so the more pixels you have lit, the more current is used. They tend to draw ~15mA or so in practice but for precise numbers you must measure the current in your usage circuit.
This board/chip uses I2C 7-bit address 0x3C

This product is listed in:

Retired

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!

Write Your Own Review