ePaper displays with front light from GooDisplay

Other Hardware Displays
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Hi, I'd like to create an alarm clock for my daughter and, therefore, consider using an eInk display. Since I won't show the seconds, the provided refresh rate of about 3s is acceptable.

However, an alarm clock must be read under dark light, so I'd like to use one with a front light. This is the product I am talking about: 2.9 inch Touch & Frontlight ePaper Display - Ultimate Portable Reading Solution

I have never worked with an eInk displays before, and I am confused since I can't find any proper documentation from Good Display on how to interface with the 6-pin FPC to switch it on and off.

The display can also be bought with a front light driver board, however, I don't see how I could use this in conjunction with a Arduino board as it only provides an USB port.

Any points to proper documentation or even demo projects would be very appreciated. Thanks in advance!!!

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Hi, I suggest you look on the main Good Display website https://www.good-display.com/.

You find additional connection boards here: https://www.good-display.com/product/121/

As you need a connection module for the e-paper panel anyway, you could use one of these:
e paper hat arduino_24 pin ePaper HAT Adapter Board with Touch Function Support, ESP32-T01_Good Display (good-display.com)
Caution: it would match on Arduino UNO, but doesn't have level converters.
Sorry, no front light connection.

DESPI-C03 seems no longer available. But there are still 140 there:
Multifunction HAT connection adapter board for e-Paper display demo kit DESPI-C03 (buy-lcd.com).
SOLD OUT not noticeable until you scroll down.
Not the first time I am tricked by contradicting information on a single web page!

24 pin ePaper HAT Adapter Board with Touch & Frontlight Function Support, DESPI-K154_Good Display (good-display.com)
which seems to be more general.

For more information you could take a look at the schematics provided on these pages.

Note that you would need level converters for use with 5V (IO pins) Arduinos.

I don't have any experience with these yet.
-jz-

You need a separate pin to switch it on or off, and a transistor and a resistor.
If you don't use touch, then you can do with just a DESPI-C02 connection module. And use the 6 pin FPC connector that comes with the display plus a transistor and a current limiting resistor.

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