The $52 7.5-inch E-paper screen connects to ESP32 boards

Until now, LILYGO’s ESP32 boards with an E-Paper screen such as TTGO T5 or Mini E-Paper Core featured smaller screens from 1.02 to 2.9 inches. But the company now offers a larger 7.5-inch screen that works with most of its T5 cards except the one used with a 4.7-inch screen.

The black and white e-paper display features 800 x 480 pixel resolution, is Arduino-programmable, and backwards compatible with the earlier T5 e-paper solution, and should be one of the most cost-effective ways to create e-paper without thread. display.

7.5 inch E-paper screen with ESP32 “T5 2.4.1” board.

Specifications of the LilyGO 7.5 inch E-paper screen:

  • Panel SKU – DKE DEPG0750_U790F3 (See PDF datasheet. Note the insecure link so your browser can complain)
  • Size – 7.5 inches diagonal
  • Resolution – 800 x 480 pixels (124 DPI)
  • Active area – 163.2 x 97.92mm
  • Pixel Pitch – 0.204 x 0.204mm
  • Host Interface – SPI
  • Dimensions – 170.2 x 111.2 x 1.2mm
  • Weight – Approximately 44 grams

I couldn’t find any info on the refresh rate.

Lilygo T5 ePaper Screen

If you already have a T5 card with an integrated E-paper screen, the new 7.5 inch screen is compatible with the cards that come with it. 1.54, 2.13, 2.6, 2.7, 2.9 or 3.7 inch, but not the 4.7 inch T5 card. You can check our previous article on the TTGO T5 board for more details, but in a nutshell, it’s an ESP32 WiFi and Bluetooth board with a microSD card slot, a speaker (depending on the model), a 24-pin IO header, a few buttons, and powered by 5V via USB or a LiPo battery.

If you do not have this card, the LilyGO 7.5 inch E-paper screen is also offered with the T5 V2.4.1 board (using ESP32 + CH9102 USB to TTL chip) as shown below.

ESP32 T5 V2.4.1 board
Card T5 V2.4.1

The board would typically be sold fitted with a 1.54in, 2.13in or 2.9in screen, but in this case it would simply be attached to the larger screen as shown in the first photo of this article. You will find documentation on Github explaining how to use the Arduino IDE with the Adafruit-GFX library to drive the E-paper display from the ESP32 microcontroller.

7.5 inch LilyGO e-paper screen is sold for around $52, but you might want to spend $59 to get a bundle with the T5 2.4.1 card. It offers a cheaper alternative to Inkplate screens, also based on ESP32, although the Wireless Inkplate screen should be much better with higher resolutions, possibly higher refresh rates (we can’t know for sure since LilyGO did not disclose this information), a front light, battery charging circuit and optional features such as touch screen.

About Debra D. Johnson

Check Also

Scientists invent a paper battery that works with just a drop of water

A new “just add water” disposable paper battery could power small-scale electronics such as smart …