BoardPilotL298N with Nordic nRF52840 DK
Wiring for the L298N dual motor driver on the Nordic nRF52840 DK (nRF52840-QIAA, 3.3 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.
Wiring
| L298N pin | Role | Nordic nRF52840 DK pin | Notes |
|---|---|---|---|
| ENA | Input to the part | P1.03 | Motor A speed (PWM). Remove the jumper to use it |
| IN1 | Input to the part | P1.04 | Motor A direction |
| IN2 | Input to the part | P1.05 | Motor A direction |
| IN3 | Input to the part | P1.06 | Motor B direction |
| IN4 | Input to the part | P1.10 | Motor B direction |
| ENB | Input to the part | P1.11 | Motor B speed (PWM). Remove the jumper to use it |
| 12V | Not wired to the board | not connected | Motor supply 5 to 35 V from a separate supply |
| GND | Ground | GND | |
| 5V | Not wired to the board | not connected | 5 V output of the on-board regulator (jumper on, supply up to 12 V) |
| OUT1 | Not wired to the board | not connected | Motor A |
| OUT2 | Not wired to the board | not connected | Motor A |
| OUT3 | Not wired to the board | not connected | Motor B |
| OUT4 | Not wired to the board | not connected | Motor B |
Check before you power it on
- Motors, servos, relays and LED strips can draw more current than the Nordic nRF52840 DK’s pins or USB can give. Power them separately and connect the grounds together.
Test code (Arduino)
The Arduino core for this board numbers its pins differently from the chip names, so no code is shown here. Use the pin names from your core’s variant file.
Arduino board: adafruit:nrf52:pca10056. Plug USB into the port on the short edge (interface MCU, J2) and set the power switch to ON; before the first Arduino sketch, burn the Adafruit bootloader and SoftDevice once.
Questions
Which Nordic nRF52840 DK pins do I use for the L298N?
ENA → P1.03, IN1 → P1.04, IN2 → P1.05, IN3 → P1.06, IN4 → P1.10, ENB → P1.11, GND → GND.
Does the L298N work with the Nordic nRF52840 DK at 3.3 V?
Yes: the L298N runs at 5 V and the Nordic nRF52840 DK uses 3.3 V signals, so no level shifting is needed.
BoardPilot checks this wiring in 3D as you build it, and finds crossed or missing wires on the real board.
Download BoardPilotFull Nordic nRF52840 DK pinout · L298N dual motor driver: all pins and data
The L298N on other boards
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