A shield for a ESP32 board (Mini 32 or 30P WROOM-32) that connects to a RGB LED Matrix panel 64x32 pixels.Designed by LIGHTWELL in Bulgaria
This board is designed to work with SmartMatrix (by Louis Beaudoin) and ESP32-P3RGB64x32MatrixPanel (by NeoCat) libraries. SmartMatrix github.com/pixelmatix/SmartMatrix/tree/teensylc P3RGB64x32Matrix…Read More…
This board is designed to work with SmartMatrix (by Louis Beaudoin) and ESP32-P3RGB64x32MatrixPanel (by NeoCat) libraries.
A RGB matrix panel with 2048 bright RGB LEDs arranged in 32 rows and 64 columns. Row and column driver circuits are built on the back side of the matrix panel. The data and control signal pins are accessible through a HUB75 (8x2 IDC) connector. It requires 13 of 14 digital I/O pins (depends of using library) of ESP32 for full color control. Most displays module comes with necessary cables (a ribbon cable and a power cable) for easy wiring between the RGB panel and the RGB matrix panel shield.
This board makes wiring them really simple! The board just slots directly onto the input header pin, uses the ribbon cable that comes provided with most of these panels to connect the pins of the output header and has screw terminals to connect the power cable that comes with most panels.
Some panels won't work with the 3.3V levels output by the ESP32, and we added 5V level shifting buffers.
Each RGB Matrix panel Shield is a kit and comes with the following:
RGB Matrix panel Shield PCB
3 pcs logic buffer 74LCX245 (option)
10uF 25V Capacitor
4 (or 2) pcs 16 pin right angle male header (2x8)
3 pcs 3 male pin headers (for use 5V logic levels to control LED Matrix Panel) (option)
2Pin Plug-in Screw Terminal Block Connector 5.08mm
NOTE: Most RGB LED panels work normally with a logic level of 3.3V and do not require logic buffer.
The following components are not provided, but are required to use this board.
RGB LED Matrix Panel module P4 256128mm 6432 pixels 1/16 Scan Indoor SMD - $10 from Aliexpress
Power supply 5V 8A - $11 from Aliexpress
To assemble the boards, place the parts on the PCB as indicated by the markings on the PCB. All parts are places on the top of the PCB (as seen in the photos).
ESP32 Development Board (30P WROOM-32 or Mini32 ESP32) is placed on the board in accordance with the marking (USB and Antena).
NOTE: Please pay attention to the polarity of the capacitor and the direction you are soldering the connectors!
Insert the ribbon cable that came with the display into the "Pout" connector on the shield (according to the used library and logical levels), insert the other end into the "Output" connector of the panel Plug the power wire that came with the display into the power pins of the panel. Attach the power wires to the 2Pin screw terminals on the shield (Pay close attention to the polarity!)
You can use one of two libraries (SmartMatrix or P3RGB64x32MatrixPanel) to control the RGB LED matrix panels. Connect the matrix panel to the appropriate connector. The name of the library is marked on the PCB. Some panels do not work with 3.3V levels. To use 5V level, connect the RGB LED matrix panel to the connectors marked “5V” and set the jumper to the “ON” position. Setting the jumper to the “OFF” position turns off the logic buffers.
These displays require a 5V power supply capable of doing roughly 4A of current Use the 2x8 connector for data and use a separate 5V 2A or 5V 4A adapter directly to the panel.
To use the display you will need to install the following libraries: SmartMatrix or P3RGB64x32MatrixPanel It can be installed from the Arduino library manager or download directly. Example sketch of using the board can be found in example directory of libraries.
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Giuseppe | Feb. 1, 2021
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