These displays are small, only about 1.3" diagonal, but very readable due to the high contrast of an OLED display. This display is made of 128x64 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 can communicate in two ways: I2C or SPI. The OLED itself require a 3.3V power supply and 3.3V logic levels for communication, but Adafruit include a 3.3V regulator and all pins are fully level shifted so you can use with 5V devices!
The power requirements depend a little on how much of the display is lit but on average the display uses about 40mA 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.
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 1K of RAM since the display must be buffered. The library can print text, bitmaps, pixels, rectangles, circles and lines. It uses 1K of RAM since it needs to buffer the entire display but its very fast! The code is simple to adapt to any other microcontroller.
Breakout Board Dimensions:
- PCB: 35mm x 35mm x 5mm / 1.4" x 1.4" x 0.2"
- Mounting Holes Distance: 27mm / 1.1" apart
- Mounting Hole Diameter: 2.5mm / 0.1"
- Screen: 23mm x 35mm / 0.9" x 1.4"
- Weight: 8.5g
- This board/chip uses I2C 7-bit address between 0x3C-0x3D, selectable with jumpers
OLED Display Details:
- Diagonal Screen Size：1.30"
- Number of Pixels：128 × 64
- Color Depth：Monochrome (White)
- Module Construction：COG
- Module Size (mm)：34.50 x 35.00
- Panel Size (mm)：34.50 x 23.00 x 1.45
- Active Area (mm)：29.420 x 14.70
- Pixel Pitch (mm)：0.23 x 0.23
- Pixel Size (mm)：0.21 x 0.21
- Weight (g)：2.18
- Brightness ( cd/m2)：100 (Typ) @ 12V
- 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 ~25mA or so in practice but for precise numbers you must measure the current in your usage circuit.
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Documentation and Resources:
- How to Rotate Raspberry Pi Video Display / Screen
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- The Maker Revolution
The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...
- Character Displays with Particle
Crunching numbers is fine, but sometimes you really need to visualise what’s going on in the tiny brain of your Photon. There are numerous different ways to visualise data or text on a microcontroller from binary LEDs, to HDMI displays, however...
Making a dumb coffee grinder slightly less dumb. This is a programmable timer tethered to a Rancilio Rocky coffee grinder. The Rocky is a "dumb" grinder and electrically very simple. Basically it's an ac motor with an on/off switch and a momentary push-button to grind. This project adds an electronic timer so that repeatable grind quantities can be produced without having to stand over the grinder. Features: - Four programmable ...
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