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PaPiRus 2.7 eInk Display HAT for Raspberry Pi from Pi Supply
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The PaPiRus Screen HAT from Pi Supply is an ePaper / eInk screen HAT designed for the Raspberry Pi. Think of it as the older sibling of the PaPiRus Zero.ePap...
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The PaPiRus Screen HAT from Pi Supply is an ePaper / eInk screen HAT designed for the Raspberry Pi. Think of it as the older sibling of the PaPiRus Zero.
ePaper / eInk is a display technology that mimics the appearance of ink on normal paper. Unlike conventional displays, ePaper reflects light – just like ordinary paper – and is capable of holding text and images indefinitely, even without electricity. Because of this, ePaper displays and single board computers or microcontrollers are a match made in heaven as together they use a very small amount of power whilst still bringing a display to your project.
The PCB assembly has a lot of driver circuitry required to keep the display running smoothly as well as an EEPROM for HAT compatibility and easy plug and play operation with the Raspberry Pi. All signals are broken out to a 40 pin female header. Also included is a battery-backed real time clock (RTC) with wake on alarm functionality via an optional reset pin and four optional slimline switches for maximum project versatility. The driver board can take either 3V3 or 5V power and logic control do this PaPiRus HAT will work with virtually any microcontroller or CPU, not just the Raspberry Pi.
The ePaper display that comes with this PaPiRus HAT is a 2.7″ diagonal and 264 x 176 resolution ePaper display. These are intended for use as small dynamic signage in grocery stores since a barcode displayed on it can be scanned by a laser barcode-reader. The display does not require any power to keep the image and will stay ‘on’ without any power connection for many days before slowly fading. Of course, it's also daylight readable and is very high contrast. This makes it excellent for data-logging applications, outdoor displays, or any other ultra-low power usages. Just like a Kindle, you can read whatever is on your screen in daylight without any reflection. More information including wiring diagrams, datasheets & and links to example code are available at rePaper.
Potential uses:
- An eInk / ePaper name tag
- Display the latest weather forecast
- A Raspberry Pi ePaper watch
- Display your own Twitter Feed
- Small dynamic digital signage (such as displaying prices for products in a store)
- Outdoor displays where you don’t want the screen to be affected by sunlight reflection
- Any sort of data-logging applications
Compatible with Raspberry Pi Zero, A+, B+, 2B, and 3B (any 2x20 connector Pi). For a Pi Zero-sized pHAT, find the PaPiRus Zero here.
Note: Raspberry Pi computer not included!
Jargon buster
Plain-language definitions for the technical terms used above.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- ePaper
- A display technology that looks more like printed paper than a glowing screen and usually keeps its image visible with very little power. It matters for projects such as labels, badges, and status screens where readability and low power use are more important than fast animation.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- pHAT
- A smaller add-on board format for Raspberry Pi, similar in idea to a HAT but usually not full-sized. It matters because pHAT compatibility can affect how neatly a board stacks or fits into a Raspberry Pi project.
- RTC
- A Real-Time Clock keeps track of time even when the main processor is asleep or powered down, usually with a small backup battery. It matters for data logging and tracking projects that need accurate timestamps.
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