BoardPilot74HC595 shift register with ESP32
Supply 3.3-5 V
Bus GPIO
Pins and ESP32 wiring
| Pin | Role | ESP32 pin | Notes |
|---|---|---|---|
| Q1 | Not wired to the ESP32 | — | Output 1 |
| Q2 | Not wired to the ESP32 | — | |
| Q3 | Not wired to the ESP32 | — | |
| Q4 | Not wired to the ESP32 | — | |
| Q5 | Not wired to the ESP32 | — | |
| Q6 | Not wired to the ESP32 | — | |
| Q7 | Not wired to the ESP32 | — | |
| GND | Ground | GND | |
| Q7S | Not wired to the ESP32 | — | Serial out to the next 74HC595 |
| MR | Not wired to the ESP32 | — | Master reset, active LOW: tie to VCC |
| SHCP | Input (the ESP32 drives it) | D25 | Shift clock |
| STCP | Input (the ESP32 drives it) | D26 | Latch clock |
| OE | Not wired to the ESP32 | — | Output enable, active LOW: tie to GND |
| DS | Input (the ESP32 drives it) | D27 | Serial data in |
| Q0 | Not wired to the ESP32 | — | Output 0 |
| VCC | Power | 3V3 |
Suggested wiring for the 30-pin ESP32 DevKit, avoiding flash, input-only and strapping pins. BoardPilot checks it for you as you wire.
Sources
- Nexperia 74HC595 datasheet, Pinning: pin 1 Q1 to pin 16 VCC; supply 2 to 6 V
Try it in 3D in BoardPilot
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Part data: CC BY 4.0, free to reuse with credit to BoardPilot.