Project Idea Brainstorm
Worked for 1 min 31 sec
Unable to apply the requested corrections because no ACUs are currently available.
Accomplished:
- Parsed the complete correction requirements.
- Identified the required R7/R8, BOM, mechanical, OLED, consistency, and ERC workstreams.
- Confirmed the design must stop before further placement, routing, DRC, Gerbers, or export.
Remaining:
- All requested investigation, sourcing, schematic/PCB corrections, mechanical verification, BOM files, and final checks remain unapplied.
Thought for 4 sec
I’ll read the updated brief, reconcile it with the current project state, and carry out only the requested scope.
Worked for 4 mins 20 sec
Created a project doc
ATLAS X Control Board Revision A — Firmware Getting Started
Configure GPIO7 LOW before enabling it as an output. Never leave it floating and never pulse it during boot. To emulate one HP momentary pow...
The controlled update was fully parsed and scoped, but no schematic or documentation changes were applied because no ACUs are available.
Remaining: add and datasheet-verify the AQY212EH interface and JST connector, update the block diagram/firmware/BOM, run ERC, and prove isolation of
HP_PWR_SW_A/B. No placement, routing, DRC, or manufacturing work was performed.Find interface parts
Create AQY212EH part
Check isolation nets
Refine this doc
Ask about this doc
ATLAS X Control Board - Revision A
Status: Preliminary schematic development
Project Overview
A low-voltage control and monitoring carrier for an official Espressif ESP32-S3-DevKitC-1-N8R8 hardware revision v1.1. It supports user controls, an external OLED, temperature sensing, indicators, and expansion. It does not electrically bridge the MacBook and HP motherboard internal buses.
Intended Use
Prototype carrier board for the ATLAS X modular dual-computer system. The DevKit is removable and communicates with the Mac through its own accessible Micro-USB connectors. Revision A is intended for beginner-friendly assembly and validation.
What the Device Should Do
- Host a removable ESP32-S3-DevKitC-1 v1.1 on two 22-pin female headers.
- Connect a removable Soldered Electronics SSD1306 OLED SKU 333100 hardware V1.3.
- Read three active-low momentary buttons with external pull-ups and RC debounce.
- Read an externally powered 3.3 V DS18B20 probe.
- Provide true 3.3 V POWER indication and GPIO-controlled STATUS indication.
- Expose I2C and selected safe GPIO expansion.
- Provide 3V3, DevKit 5V/VBUS if available, and GND test points.
Main Features
- ESP32-S3 WiFi/BLE compute module on removable DevKit.
- 128 x 64 OLED over I2C at address 0x3C.
- ACTION 1, ACTION 2, ACTION 3 buttons.
- DS18B20 1-Wire probe connector.
- POWER and STATUS LEDs.
- Dedicated I2C expansion and general expansion headers.
- Four M3 mounting holes and two OLED module mounting holes.
System Architecture
Diagram
Hardware Subsystems
Controller
Official ESP32-S3-DevKitC-1-N8R8, hardware v1.1, populated with ESP32-S3-WROOM-1-N8R8. Carrier uses the official 2 x 22 header geometry. Both onboard Micro-USB connectors must remain accessible.
Power
The DevKit and peripherals are powered only through a DevKit Micro-USB input. No additional USB connector, charger, battery, HP power control, or alternate supply path is included. External fan power is absent.
User Interface
- OLED connector pin order: GND, VCC, SDA, SCL.
- Buttons connect GPIO to GND and use external pull-up plus RC debounce; firmware debounce is also required.
- POWER LED is connected to 3V3 through a current-limiting resistor.
- STATUS LED is controlled by GPIO15 through a current-limiting resistor.
Temperature Sensor
Three-pin connector: GND, 3V3, DATA. DS18B20 uses externally powered mode and a 4.7 kohm pull-up from DATA to 3V3.
Expansion
- I2C header: GND, 3V3, SDA, SCL.
- General header: GND, 3V3, GPIO10, GPIO11, GPIO12, GPIO13, FAN_PWM_FUTURE, FAN_TACH_FUTURE.
- FAN_PWM_FUTURE and FAN_TACH_FUTURE connect only to the expansion header.
Interfaces and Connections
Table
| Function | GPIO / Rail |
|---|---|
| ACTION_1 | GPIO4 |
| ACTION_2 | GPIO5 |
| ACTION_3 | GPIO6 |
| I2C_SDA | GPIO8 |
| I2C_SCL | GPIO9 |
| DS18B20_DATA | GPIO16 |
| STATUS_LED | GPIO15 |
| FAN_PWM_FUTURE | GPIO17 |
| FAN_TACH_FUTURE | GPIO18 |
| General expansion | GPIO10, GPIO11, GPIO12, GPIO13 |
| Spare, not exposed by requirement | GPIO7 |
Power and Runtime Expectations
USB-powered only. No battery or autonomous-runtime requirement applies. Peripheral loading must remain within the official DevKit 3.3 V regulator capability.
Power Tree and Power Budget
Diagram
Final current budget depends on the external expansion load and must be checked before attaching daughterboards.
Manufacturing and Assembly Expectations
- Two layers, 1.6 mm FR-4, 1 oz copper.
- Target outline approximately 100 x 80 mm or smaller with rounded corners.
- Through-hole connectors and buttons where practical.
- Four 3.2 mm non-plated M3 mounting holes near corners.
- Clear silkscreen for every connector, polarity, signal, and
ATLAS X - REV A. - No routing or manufacturing export is authorized at this stage.
Firmware-Relevant Hardware Requirements
- Initialize I2C on GPIO8/GPIO9.
- Configure GPIO4/GPIO5/GPIO6 as active-low inputs; use firmware debounce in addition to hardware RC filtering.
- Configure GPIO16 for DS18B20 1-Wire.
- Drive GPIO15 for STATUS LED according to final LED polarity.
- Leave GPIO17/GPIO18 unused unless a future external fan daughterboard is installed.
Physical Design Expectations
- DevKit antenna at the carrier edge with the official keepout free of copper, traces, and components on both layers.
- Both DevKit Micro-USB connectors mechanically accessible.
- OLED mounted removably on a 1 x 4 2.54 mm socket and two M3 nylon spacers; exact connector and hole coordinates must come from official V1.3 KiCad/STEP files.
- Connectors and buttons near board edges.
Important Design Decisions
- Fan circuitry is completely omitted from Revision A.
- GPIO17 and GPIO18 are reserved only as future fan-interface labels on the expansion connector.
- Native USB GPIO19/GPIO20 are preserved.
- No populated carrier I2C pull-ups unless verification of OLED V1.3 and expected expansion devices shows they are needed. Optional DNP footprints may be included.
- POWER LED indicates the actual 3.3 V rail and is not firmware-controlled.
GPIO Exclusions
Do not use GPIO0, GPIO3, GPIO45, or GPIO46 because they are strapping-related. Do not use GPIO19/GPIO20, GPIO35-GPIO37, GPIO38, GPIO39-GPIO42, or GPIO43/GPIO44. GPIO7 remains spare.
Assumptions and Items Requiring Confirmation
- Exact official DevKit v1.1 mechanical drawing and header coordinates must be verified before PCB placement.
- Exact OLED SKU 333100 V1.3 connector and mounting-hole coordinates must be imported or verified from the official KiCad/STEP package before layout.
- The DS18B20 probe connector family, mating plug, and cable pinout remain to be confirmed before footprint finalization.
- Button model, connector series, LED package/style, test-point style, and preferred resistor/capacitor mounting technology require final sourcing confirmation.
- The external expansion load is unspecified; no guaranteed 3.3 V current is allocated for it.
- Fan electrical and mechanical details are intentionally outside Revision A.
Change Notes
- Corrected the DevKit connector type from USB-C to the official v1.1 Micro-USB implementation.
- Removed all fan circuitry and fan-power provisions.
- Fixed GPIO17/GPIO18 as future fan daughterboard signals only.
- Changed POWER LED to a true 3.3 V rail indicator and left GPIO7 unused.
Project Overview
Intended Use
What the Device Should Do
Main Features
System Architecture
Hardware Subsystems
Controller
Power
User Interface
Temperature Sensor
Expansion
Interfaces and Connections
Power and Runtime Expectations
Power Tree and Power Budget
Manufacturing and Assembly Expectations
Firmware-Relevant Hardware Requirements
Physical Design Expectations
Important Design Decisions
GPIO Exclusions
Assumptions and Items Requiring Confirmation
Change Notes
