nerve_pcb

PCB for CAN-based control systems dev platform.

• Firmware: nerve.

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Table of Contents

• nerve_pcb
  • 1 Overview
  • 2 Board Specifications
    • 2.1 Connectors
    • 2.2 Switches & Jumpers
  • 3 Release Notes
    • 3.1 v0.1.0-alpha
    • 3.2 v0.1.0-beta
    • 3.3 v0.1.0 (WIP)
  • 💖 Sponsors
    • PCBWay
      • Why PCBWay?

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This project is sponsored by PCBWay. You can learn more about their valuable support here: 💖 Sponsors/PCBWay.

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1 Overview

Top	Bottom

• Bottom row pictures show 4 Layer assembly variant of nerve_pcb, v0.1.0-alpha.

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2 Board Specifications

2.1 Connectors

Connectors fixed by hardware (PCB traces or the connector itself).

Connector	Ref	Description
Tag-Connect TC2050	J1	Programming/debug connector
USB-C 5 V power	J2	Power only USB-C, primary 5 V source
BOOT0 jumper	J3	Open for run flash memory (pull-down on open)
Hinge microSD card	J4	Portable storage, see Molex product video
Top side 2x8 board-to-board	J5	See schematic/layout for details
Bottom side 2x10 board-to-board	J6	See schematic/layout for details
UART3	J7	Pin 1: UART3 RX, Pin 2: UART3 TX
CAN1 (Transceiver U7)	J8	Pin 1: CAN1 High, Pin 2: CAN1 Low
CAN2 (Transceiver U8)	J9	Pin 1: CAN2 High, Pin 2: CAN2 Low

2.2 Switches & Jumpers

User controllable hardware and/or firmware driven inputs.

Switch/Jumper	Ref	Description
MCU NRESET switch	SW1	Generic 6 mm TH button, push to reset
MCU PA0 switch	SW2	Generic 6 mm TH button, designed for SYS_WKUP0
MCU 3.3VBATT	JP1	Bridge to short 3.3 V supply to MCU VBAT
SDIO card detect jumper	JP2	Open = card detected, closed = not detected
BNO085 clock select	JP3	Open = crystal, closed = external/internal
BMP390 I2C address	JP4	Open = 0x76, closed = 0x77

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3 Release Notes

3.1 v0.1.0-alpha

• Pre-release 4-layer development board variant.
• nerve_pcb_dev, commit 76bec6f.
  • Original commit on a different repo for automated workflow reasons.
  • Closest commit on this repo is f2d1f21.
• Order date: 2024/11/15.
• Order number: W837000ASB3.

3.2 v0.1.0-beta

• Pre-release 6-layer board variant.
  • Short-term pre-release board bring-up/testing release.
• Order date: 2025/01/13.

3.3 v0.1.0 (WIP)

• Minor changes from the previous v0.1.0-beta pre-release version.
  • CAN termination design switched from single 120 ohm termination to split 60 ohm termination with 4.7 nF capacitor.

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💖 Sponsors

PCBWay

This project is sponsored by PCBWay, whose PCB manufacturing services are essential in producing high-quality prototypes for its development. Their support ensures reliable boards that meet the project's demands.

Why PCBWay?

PCBWay stands out for their exceptional services and commitment to the community:

• PCB Manufacturing: High-quality fabrication with options for multilayer, rigid-flex, and advanced designs.
• PCB Assembly: Comprehensive solutions, including soldering, component sourcing, and assembly.
• CNC Machining & 3D Printing: Additional prototyping options to support complete product development.
• Fast Turnaround: Reliable and quick production times to keep projects on schedule.
• Support for Open Source & Education: PCBWay actively sponsors projects and provides educational resources like tutorials, videos, and documentation, empowering developers and hobbyists.
  • This commitment to education and open-source advocacy was a key factor in choosing them as a partner 🙂.

Their dedication to professional-grade services and fostering innovation makes PCBWay an invaluable partner in bringing this project to life.

Learn more here: Why PCBWay?