BoardPilotMAX7219 8-digit 7-segment display with ESP32
Supply 5 V
Bus SPI
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| VCC | Power | VIN | Needs 5 V: use VIN |
| GND | Ground | GND | |
| DIN | SPI MOSI | D23 | Data in |
| CS | SPI chip select | D5 | Load (CS) |
| CLK | SPI clock | D18 | Clock |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
This module is sold for 5 V. Its outputs may be 5 V: use a level shifter or a voltage divider on ESP32 inputs.
Sources
- Maxim MAX7219 datasheet, Serial interface DIN, CLK, LOAD (CS)
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.