agp.cooper
e-Paper Display
What is to like
- very wide viewing angle
- very low power
- sunlight viewable
- retains image when powered off
- high resolution
- work on Uno and Nano boards!
What is not to like
- no manual or documentation except for the demo code and library files.
- demo does not compile
- hook up not document.
- demo is not well presented
- some ghosting of previous image
- awkward coding
- 3.3v and not 5v tolerant (at least not said in the controller chip datasheet).
Library fixes
- replace <spi.h> with <SPI.h>
- replace <arduino.h> with <Arduino.h>
Hook up (Uno/Nano)
- BUSY <-> D7 (INPUT)
- RST <-> D8 (OUTPUT)
- DC <-> D9 (OUTPUT)
- CS <-> D10 (OUTPUT)
- SPI (2 MHz):
- CS <-> D10 (SS)
- DIN <-> D11 (MOSI)
- CLK <-> D13 (SCLK)
Surprises
The native screen orientaion is rotated (and upside down?):
Interfacing a 5v systm to a 3.3v system
There are a number of ways of interfacing a 5v system with a 3.3v system. In my case I used a signal diode (2n4148) and a 1k resistor (you could experiment with higher the resistor values to reduce power consumption.):
Here is the interface board:
Work to do
Although the demo once fixed up works nicely, the library needs simple some commands like that in the LCD library, like:
- lcd.setCursor(), and
- lcd.print()
However, I do think the rotated native orientation has merit for small displays.
Pretty happy with this display over all.
Magic
sidsingh
Frank Buss
Bharbour
Denis
buydisplay.com sells e-paper display modules and the panel only. Panel 212X104 $6.96, they have several sizes and the modules have FFC or PIN headers.