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64x64 HUB 75 LED Matrix

Me documenting my 64x64 LED matrix display


🗓️ Created: 2025-03-11 | Modified: 2025-08-03

Main

Display documentation

From Aliexpress seller

64x64 Indoor RGB HD P3 Led Module Video Wall High Quality P2.5 P4 P5 P6 P7.62 P8 P10 Panel Full Color Display - Aliexpress.com

Key Value
Item P3
Chip Epstar
Chip size Red 9 mil, Green 12. Blue 12mil
Light type SMD2121
Pixel Pitch 3mm
Module Size 192mmX192mm
Module Resolution 64 X 64 (dots)
Density of pixel 111111dots/m2
Pixel configuration 1R1G1B
Red wavelength 625±2nm
Green wavelength 525±2nm
Blue wavelength 470±2nm
Colors 16777216
Best viewing distance ≥2m
viewing angle 120°/90°
Maximum power consumption 20W
Brightness 1500cd/m2
Gray scale 14bits per color
Color temperature 6500k
Control method Synchronization or Asynchronization
Driving method 1/32 scanning
Frame frequency 60Hz
Refresh frequency ≥600Hz
Working Voltage DC5V
IP grade IP54
MTBF More than 8000hours
Life Span 80,000hours

Chips

  1. CHIPONE ICN74HC245TS A14276CA
  2. MBI5124GP A3YN72CTHB
  3. RUC7258 8W913170

Chip 1 Chip 2 Chip 3

Display IN connector

In left In right


Micro controller wiring

I use an ESP32 WEMOS LOLIN S2 Mini which has an ESP32-S2F chip on it

ESP32-S2F_chip

Display in wiring

    ┌────────┐
R1  ┤  1  40 ├ G1
B1  ┤  2  38 ├ N
R2  ┤  4  36 ├ G2
B2  ┤  6  34 ├ LE
LA  ┤  8  21 ├ LB
LC  ┤ 10  17 ├ LD
CLK ┤ 13  15 ├ LAT
OE  ┤ 14   ⏚ ├ GND
    └────────┘

ESP32 S2 Mini


PCB Connector board

The screen glitches unless you have a solid connection.

This PCB is a straight connection, except the gnd which is flipped with the adjacent pin.

esp32_display_pcb_top_plugged_in esp32_display_pcb_bottom

Half the display glitched out, untill i added a 100pf capacitor between lat pin and gnd as per: https://github.com/mrcodetastic/ESP32-HUB75-MatrixPanel-DMA/issues/130#issuecomment-867116753


Software

https://github.com/mrcodetastic/ESP32-HUB75-MatrixPanel-DMA

#define R1_PIN   1
#define G1_PIN  40
#define B1_PIN   2
#define R2_PIN   4
#define G2_PIN  36
#define B2_PIN   6
#define A_PIN    8
#define B_PIN   21
#define C_PIN   10
#define D_PIN   17
#define E_PIN   34 // required for 1/32 scan panels, like 64x64px. Any available pin would do, i.e. IO32
#define LAT_PIN 15
#define OE_PIN  14
#define CLK_PIN 13

HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};
HUB75_I2S_CFG mxconfig(
    64, // Module width
    64, // Module height
    1, // chain length
    _pins, // pin mapping
);
dma_display = new MatrixPanel_I2S_DMA(mxconfig);

I'm still experiencing some glitching, especially on the lower half of the display, albeit a better PSU made the problem go away for static sketches, plasma still struggles.


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