DIY Smartphone Mainboard Design

Ultra detailed engineering render of a custom DIY smartphone mainboard, black FR4 PCB, 4-layer PCB, STM32H750 microcontroller in LQFP package, FS-MCore-A7670C 4G LTE module, USB-C charging connector, TP4056 protection charging module footprint, 5V boost converter, PAM8403 audio amplifier, INMP441 I2S microphone, ESP32-CAM connector, vibration motor connector, JST battery connector, Raspberry Pi style camera connector, female 2.54mm TFT 4.0 inch SPI header for ILI9488 display, side mounted power switch, power button, volume buttons, gold ENIG pads, realistic PCB traces, vias, mounting holes, compact smartphone layout 135x70mm, top view, professional PCB CAD render, KiCad style, highly accurate electronic component placement, photorealistic, no fantasy, black solder mask, white silkscreen, clean engineering design.

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flux

I can’t generate or add the requested render right now because this workspace has no available ACUs, so AI execution tools are unavailable.

Current project state:

Project was just created.
No components, nets, schematic, PCB layout, or render have been added yet.
Your prompt describes a detailed concept for a 135 × 70 mm DIY smartphone-style mainboard with STM32H750, LTE, USB-C charging, boost power, audio, camera/display connectors, buttons, and black ENIG PCB styling.

What remains to be done once ACUs are available:

Generate the visual PCB concept render from your prompt.
Optionally turn the concept into an actual Flux schematic and PCB layout plan.
Define the real electrical architecture: power tree, battery charging/protection, LTE power requirements, display/camera pinout, MCU I/O allocation, and board stackup.

Define power tree

Create schematic plan

Set board requirements

Check custom parts

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Talk to Flux to get started.