// display
MAX7219 8x8 / 7-seg driver
SPI driver for LED matrices and 7-seg displays
€1.50
avg eur
no image
SPI
Pins
5
Specs
4
Libraries
2
Protocols
1
// wiring → esp32 devkit v1
3V3
EN
GPIO36
VP
GPIO39
VN
GPIO34
GPIO35
GPIO32
GPIO33
GPIO25
GPIO26
GPIO27
GPIO14
GPIO12
GND
GND
GPIO13
ESP32
WROOM-32
devkit v1
USB
VIN
5V
VCC
GND
GPIO23
DIN
GPIO22
SCL
GPIO1
TX0
GPIO3
RX0
GPIO21
SDA
GPIO19
MISO
GPIO18
SCK
CLK
GPIO5
SS
CS / LOAD
GPIO17
TX2
GPIO16
RX2
GPIO4
GPIO2
GPIO15
sensor pin (left)
sensor pin (right)
unused
// pinout → esp32
| Sensor Pin | ESP32 Connection |
|---|---|
| VCC | 5V |
| GND | GND |
| DIN | GPIO 23 (MOSI) |
| CS / LOAD | GPIO 5 |
| CLK | GPIO 18 (SCK) |
// technical specs
Outputs
64 LEDs (8x8) or 8 digits
Brightness
16 levels (PWM)
Cascade
yes (DOUT chain)
Voltage
5V
// github libraries
// notes & warnings
Cascade up to 8 modules from one CS line for long scrolling tickers. Power-hungry at full brightness — don't run from ESP32 5V pin.
// related sensors · display