Board for addressable LED strip (based on ESP32)

Technical assignment

Project: NeoPixel Board (based on ESP32)

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1. General information

Create a new printed circuit board NeoPixel Controller based on ESP32,

using the existing board on ATmega328P as a prototype for dimensions, component placement, and design.

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2. Source data

• There is a ready-made sample board in EasyEDA (based on ATmega328P).

    •    It is required to preserve:

    •    overall dimensions of the board;

    •    placement of connectors and mounting holes;

    •    maximum possible compliance with the appearance and routing.

3. Main technical parameters

4. Main functions

    1.    Control of two independent lines of addressable LED strip (12 V).

2. Communication with the central network via CAN Bus.

3. Ability to flash and debug via USB Type-C.

4. Support for complete power shutdown of LED strips via relay.

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5. Additional requirements

• Add contact pads on the sides of the board for connecting multiple modules with jumpers.

• Conduct an evaluation of the components used (in the existing project on ATmega328P):

    •    if necessary, replace with more suitable ones (considering operation with ESP32, 12 V power supply, thermal resistance, and noise immunity).

Maximally using components from Basic-parts (for cost savings when ordering)

• Conduct a safety analysis:

    •    protection against incorrect power connection;

    •    protection against overvoltage;

    •    protection against short circuits (for power and control lines).

• Implement an electronic relay or transistor switch that provides complete power shutdown of LED strips.

6. Work result

1. A completed project in EasyEDA, fully compatible with production at JLCPCB.

    2.    A set of files:

    •    .json / .pcb / .sch (EasyEDA project);

• Gerber files;

• BOM (bill of materials);

• Pick-and-Place (DOM).

    3.    After assembly, the board should provide:

    •    correct connection and power to ESP32;

    •    stable operation of CAN Bus;

    •    control of two 12-volt LED lines;

    •    safe operation under possible connection errors.