Adafruit 4814 2.13 inch HD Tri-Color eInk / ePaper Display FeatherWing

The Adafruit 4814 is a high-definition tri-color electronic ink display module designed for Feather-compatible microcontroller boards, offering 250x122 pixel resolution with red, black, and white color capability. Professional developers and IoT engineers use this FeatherWing for battery-powered applications requiring persistent visual output without continuous power consumption, such as environmental monitoring dashboards, inventory tracking systems, and smart home displays. This product solves the critical challenge of creating low-power, always-visible information displays that maintain image retention without backlight power drain, making it ideal for remote sensing applications and portable embedded systems.

Product Overview

The Adafruit 4814 utilizes advanced electrophoretic display technology where charged pigment particles suspended in microcapsules move in response to electrical fields, creating visible images that persist even when power is removed. The tri-color variant incorporates red and black pigments alongside white background, enabling sophisticated visual communication with three distinct color states. This FeatherWing form factor integrates seamlessly with Adafruit Feather development boards through standard 0.1-inch header pins, eliminating complex wiring while maintaining full SPI communication protocol support for rapid image updates up to 1 Hz refresh rate.

What distinguishes the 4814 from standard monochrome e-ink displays is its 212x104 active display area combined with 250x122 pixel addressability, delivering crisp text rendering and detailed graphics suitable for professional applications. The display operates on a dual-voltage system requiring both 3.3V logic and 5-15V for driving the electrophoretic elements, with integrated power management circuitry handling voltage regulation. The module features a flexible ribbon cable connector and includes mounting holes for secure integration into enclosures, while consuming minimal standby power of approximately 0.3mA when displaying static content, making it exceptionally suitable for battery-backed IoT deployments.

Key Specifications

Specification	Details
Product Type	Tri-Color eInk ePaper Display FeatherWing Module
Brand	Adafruit Industries
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Display Resolution	250x122 pixels addressable
Active Display Area	212x104 pixels
Color Capability	Tri-Color: Red, Black, White
Communication Interface	SPI (Serial Peripheral Interface)
Logic Voltage	3.3V
Display Driver Voltage	5-15V
Refresh Rate	Up to 1 Hz
Standby Power Consumption	Approximately 0.3mA
Form Factor	Feather FeatherWing Compatible

Key Features

• High-Definition Tri-Color Display: 250x122 pixel resolution with red, black, and white color support enables professional-grade information visualization and status indication without color bleeding or crosstalk
• Ultra-Low Power Consumption: Electrophoretic technology maintains displayed content indefinitely without power, consuming only 0.3mA during standby operation, extending battery life to months in IoT applications
• Feather-Compatible Integration: Standard FeatherWing form factor with 0.1-inch header pins provides plug-and-play connectivity to Adafruit Feather boards, eliminating breadboard prototyping and reducing assembly time
• Fast SPI Communication: Direct SPI interface supports rapid image updates at 1 Hz refresh rate, enabling real-time data display updates while maintaining low power architecture
• Flexible Ribbon Cable Connection: Detachable FPC connector allows flexible display positioning and integration into custom enclosures without soldering
• Integrated Power Management: Onboard voltage regulation and charge pump circuitry handles dual-voltage requirements, simplifying power supply design and reducing external component count

Applications and Use Cases

• Remote Environmental Monitoring: Deploy in weather stations and agricultural sensors where continuous WiFi connectivity is unavailable; the display shows temperature, humidity, and pressure readings that persist for weeks without power, with updates transmitted via LoRaWAN or cellular modules
• Battery-Powered Inventory Management: Integrate into warehouse shelf tags and asset tracking systems where electronic labels must update inventory counts while running on coin-cell batteries for 6-12 months between replacements
• Smart Home Status Displays: Create wall-mounted dashboard panels showing energy consumption, security status, and weather forecasts that remain visible during power outages, with updates synchronized through home automation networks
• Portable Data Logging Devices: Build handheld field instruments for environmental surveys and scientific research that display real-time sensor data on high-resolution tri-color screens while maintaining 40+ hour battery runtime
• Medical Device Interfaces: Implement patient monitoring displays in portable diagnostic equipment where the persistent image reduces EMI sensitivity and allows clinical staff to view vital signs without continuous display backlight power

How to Use

To begin using the Adafruit 4814, first install the Adafruit GFX and Adafruit IL0373 libraries through the Arduino IDE Library Manager, which provide abstracted graphics functions and display initialization routines. Connect the FeatherWing to your Feather board by aligning the header pins and pressing firmly until seated; the SPI pins (MOSI, MISO, SCK) connect automatically, while chip select (CS) typically routes to pin 10 and data/command (DC) to pin 9, though these are configurable in code. Power your Feather board with a USB cable or battery, then initialize the display in your sketch using the IL0373 class constructor, specifying the CS and DC pin assignments along with the display dimensions (250x122).

For optimal performance, configure the display refresh sequence by calling setBlackBuffer() and setColorBuffer() to allocate memory for image data, then use the standard Adafruit GFX drawing functions such as drawPixel(), drawLine(), drawRect(), and print() to compose your visual content. Update the physical display by invoking display() after drawing operations, which sends the buffered image data to the e-ink controller via SPI and initiates the electrophoretic refresh cycle lasting 1-2 seconds. For battery-powered applications, place the display in deep sleep mode using powerDown() when updates are not required, reducing current draw to microampere levels; wake the display with powerUp() when new data needs transmission, typically on interrupt triggers from real-time clock modules or sensor threshold events.

Frequently Asked Questions

What is the difference between the Adafruit 4814 and standard monochrome e-ink displays?

The Adafruit 4814 incorporates tri-color electrophoretic technology with red and black pigments, enabling three distinct visual states (red, black, white) compared to monochrome displays offering only black and white. This tri-color capability allows simultaneous display of warning indicators in red, primary information in black, and background in white within a single 2.13-inch screen, reducing the need for multiple displays in status monitoring applications. Additionally, the 4814 features higher pixel addressability at 250x122 resolution compared to many monochrome alternatives, providing sharper text rendering and finer graphical detail suitable for professional dashboards and data visualization.

How long does the display image persist without power?

Electrophoretic display technology enables indefinite image persistence without power consumption because the pigment particles remain in their final position due to mechanical friction within the microcapsules. The Adafruit 4814 will maintain its last displayed image for weeks or months without any electrical supply, making it ideal for battery-powered applications where periodic updates suffice. However, environmental factors such as extreme temperature fluctuations, physical vibration, and high humidity may gradually degrade image contrast over extended periods; for critical applications requiring permanent archival, periodic refresh cycles every 2-4 weeks are recommended to restore full contrast.

Can the Adafruit 4814 be used with microcontrollers other than Adafruit Feather boards?

Yes, the Adafruit 4814 FeatherWing can be integrated with any microcontroller supporting SPI communication and GPIO pins for chip select and data/command control. The standard 0.1-inch header pins can be soldered directly to custom PCBs or breadboards, with the SPI interface (MOSI, MISO, SCK) connecting to the corresponding SPI bus of your microcontroller, and CS and DC pins routed to any available GPIO pins. Arduino-compatible boards including Arduino Uno, Arduino Mega, and third-party variants such as ESP32 and STM32 platforms are fully supported through the open-source Adafruit IL0373 library, which abstracts hardware-specific SPI timing and provides cross-platform compatibility.

What power supply specifications are required for the Adafruit 4814?

The Adafruit 4814 requires dual-voltage operation with 3.3V for logic-level SPI communication and microcontroller interfacing, and 5-15V for the electrophoretic driver circuitry that generates the electric fields for pigment particle movement. The onboard charge pump and voltage regulation circuitry accepts input voltages between 5V and 15V, making it compatible with standard USB power supplies, lithium-polymer batteries, and regulated DC power sources. Current consumption during display refresh cycles peaks at approximately 100-150mA for 1-2 seconds while the electrophoretic elements are active, then drops to 0.3mA during standby; for battery-powered applications, a 2000-3000mAh lithium-polymer battery can sustain 100+ update cycles before requiring recharge.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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