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// 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