LED Blinker Circuit Design
Thought for 1 min 22 sec
Manufacturing files generated successfully:
- Gerber ZIP
- https://cdn2.flux.ai/flux-comment-files/files/commentFileId-0fcb9cebade9136f20aa75363445c0678a6467a5900e4c7ae97399cb41610659.csv?GoogleAccessId=autopilot-sa-d60c62b%40graviton-mvp.iam.gserviceaccount.com&Expires=4935217148&Signature=qxIdw2muNMkvlxRMQDsxXiRWAJ6D1V0ojJJjYrOFn5b4qANEr5Nzlr3AiOVkuuJxozNbHUCd3imPJpt7JKCutVaat05Lc7zahP395b6QvxEq8BRSVvAw72uDkGHd57jB%2BDuJzknkedn7csdAm5KlP%2BsiZvk1VSkmtFb3ENVCaYVwU5LgUKXKcWc4qSWTSb4xQa5LY2s29OgeWYEXDoFJnGfk2KOm2vn1Pjx6CF6tNhLkCsWEA%2FwSP0OrtR2qRUZS5mzsL73XV4J3HkhrnrLGk%2B6IP3eEx7Iu6eZNuM0jX64BkZaYvxU52CuOgCI3VhVD%2Ba9mcNwTwXjMMmUAp7skUQ%3D%3D
- https://cdn2.flux.ai/flux-comment-files/files/commentFileId-d0f0f0a9d255f45deb56cd5b33d0f22abe06e385384e741c4f488a7a9345be39.csv?GoogleAccessId=autopilot-sa-d60c62b%40graviton-mvp.iam.gserviceaccount.com&Expires=4935217149&Signature=lC3VinI9geHZQwGJ7Ge2QdBYK8UhZc%2Bc5jm0fr%2BTIyjv87yVCO1dUA0VS1yW2h6lEf4GlxvBLI0x%2BfOCtjJtxFFd6dAFFQMRUr1JjZi8mIGivrsOQ4QgWITpHazDhX9hrWBu4U%2BrYrVZNX7R%2BvSv%2B7npOzOH9IPzMeMvLCYdAA3GkB44Gk5P41pTmkJTr%2FaYxvZrlwzNbaCZdavhl9kpkmY6ZRJquFw2Jl9kVBikUIni3YCHLB%2FwMxAyVLAwFBExBif2O27zfhSc%2BD0MTzLjqzHVhgB9c1b0awXGpM%2FyTN%2FtJ5T9RWAjflGG1F0Skni%2BJUxyk7lHBBurvUZqjIOYmg%3D%3D
- https://cdn2.flux.ai/flux-comment-files/files/commentFileId-5e25aba74de45ca8f45a42cc4239d11e1da914de457f4cfca86c2e678f2b0b43.csv?GoogleAccessId=autopilot-sa-d60c62b%40graviton-mvp.iam.gserviceaccount.com&Expires=4935217149&Signature=YDf8QeeXJPhw%2Fh4Jbl0OfHV1Scece1LoJX7CNSWmBpLsTKVqR1EEibuIMHY3FZwQv5hJ%2BIPNHp2BeWDLLLH%2B%2FILBmjREk65YWuQhRgid%2Bwfz9QtgRbylToFJq96JjRbL3sf%2BzBszxj8zg4jsR%2BxHhjdVvKuCTmwjfGJsW9Xr2bC8sn17AW8GumxxmilV0gJ2GfK8wCaQHLxXD5nwqRyOYGLarJCCvHLBCBCvix0yyQyZUpHnowuXarDOIUKZZ3vXInWn%2FKbyEDO7VPUH5N4sfbb39WzfnoPgKs6FrWBhWgbusD4DDYnHwcdTKSWkST1La%2BQMm8%2BThI0n4lPAQGUwAw%3D%3D
DXF Drawing
Failed to load DXF drawing.
The DXF uses a
MILLING_CUTOUT layer and shows the 1.5mm non-plated full-height isolation slot centered at x=85mm on the 200×140mm board. Specify 2-layer FR4, ENIG in the fab order notes.Review package and DRC
Review Gerbers
Check DXF alignment
Run final reports
Regenerate after manual routes
Refine this doc
Ask about this doc
Project Specification: GLECS V4 Pure Logic Controller
Project Overview
- Status: Draft from uploaded specification
- Device: GLECS V4 PURE LOGIC CONTROLLER, Onboard 4G Module Edition
- PCB: 200mm x 140mm rectangular, 2-layer FR4, 1.6mm, 1oz copper, ENIG finish
- Purpose: STM32-based clean logic controller with onboard 4G connectivity, isolated relay/switching section, sensors, display/debug headers, and strict ground isolation between relay and logic zones.
Intended Use
- Controller board for monitoring and command/control, including Ganga starter coil command wiring through an isolated relay contact interface.
- Intended as a production-intent or advanced prototype PCB with onboard cellular connectivity.
What the Device Should Do
- Accept 12V DC input through a barrel jack.
- Generate 5V, 3.3V, and 4.0V LTE rails.
- Run STM32F103C8T6 firmware.
- Communicate with an onboard A7672S/SIM7600 4G module through UART.
- Provide relay command output through an optically isolated relay zone.
- Read DS18B20, DHT22, and ACS712 sensor signals.
- Provide OLED I2C, SWD programming, UART debug, reset test point, SIM, and U.FL antenna interfaces.
Main Features
- STM32F103C8T6 MCU with 8MHz crystal, reset, BOOT0, SWD, and UART debug.
- A7672S/SIM7600-style onboard 4G module header with nano SIM holder and U.FL antenna connector.
- Separate Zone 1 relay/switching ground and Zone 2 logic/star ground.
- 12V relay output contact interface via SPDT relay.
- 12V input protection: fuse, TVS, reservoir capacitor.
- Multiple regulated rails: 5V, 3.3V, and 4V LTE.
System Architecture
Diagram
Hardware Subsystems
Power
- J_PWR: DC-005 5.5mm/2.1mm center-positive barrel jack.
- F1: 1A polyfuse specified in uploaded spec.
- D_TVS: P6KE15A across VCC_12V_INPUT and GND_STAR.
- C_RES: 1000uF/25V reservoir capacitor.
- U_5V: AMS1117-5.0 from 12V to 5V.
- U_3V3: AMS1117-3.3 from 5V to 3.3V.
- U_4V: LMR33630 buck from 5V to 4.0V LTE rail with 100k/51.1k feedback.
MCU
- STM32F103C8T6 powered from 3.3V.
- VDD/VDDA decoupling, reset pull-up/cap, BOOT0 pull-down, 8MHz crystal with 22pF load capacitors.
Cellular
- A7672S/SIM7600-type module on 2x20 header.
- Dedicated 4V rail with local 100uF and 100nF decoupling.
- SIM holder and U.FL connector with antenna keepout.
Relay Isolation
- Zone 1 is left of x=85mm isolation slot.
- GND_RELAY and GND_STAR must never connect.
- Only RELAY_CTRL crosses the slot through PC817 LED input path.
Sensors and Headers
- DS18B20, DHT22, ACS712-20A, OLED I2C, SWD, UART debug, status LED, reset test point.
Interfaces and Connections
- Power input: 12V DC barrel jack.
- Relay terminals: J1 12V relay drive, J2 starter coil COM/NO/NC.
- Cellular: SIM card holder and U.FL/IPEX antenna.
- Sensors: DS18B20, DHT22, ACS712 current sense.
- Debug: SWD and UART headers.
- Display: 4-pin I2C OLED header.
Power Tree and Power Budget
Table
| Rail | Source | Loads |
|---|---|---|
| VCC_12V_INPUT | J_PWR through F1 | 5V regulator input, reservoir/protection |
| VCC_12V_RELAY | Direct 12V relay feed per spec | Relay coil/screw terminal zone only |
| VCC_5V | AMS1117-5.0 | Sensors, OLED, pullups, feeds 3.3V and 4V regulators |
| VCC_3V3 | AMS1117-3.3 | STM32, SWD/debug references |
| VCC_4V_LTE | LMR33630 buck | A7672S/SIM7600 4G module |
Important engineering concern: The uploaded spec feeds AMS1117-5.0 from 12V while also feeding LTE through downstream conversion. This may exceed safe thermal dissipation depending on sensor/OLED/current loads and should be verified or changed to a buck-first power tree before layout.
Manufacturing and Assembly Expectations
- 2-layer FR4, 1.6mm, 1oz copper, ENIG.
- Mixed components from spec include SMD and through-hole; hand-soldering ease must be considered when choosing footprints.
- Zone isolation slot: 1.5mm physical cutout at x=85mm, full height.
Firmware-Relevant Hardware Requirements
- STM32 boot from flash via BOOT0 pulldown.
- SWD programming header and UART debug header required.
- UART2 to LTE module.
- GPIO controls: LTE_PWRKEY, LTE_RESET, RELAY_CTRL.
- Inputs: LTE_STATUS, DS18B20, DHT22, ACS712 ADC.
Physical Design Expectations
- Board size: 200mm x 140mm.
- Zone 1: x=0-85mm isolated relay/switching zone.
- Zone 2: x=85-200mm clean logic zone.
- 4G antenna top-right with copper keepout.
- STM32 crystal keepout: no copper fill within 5mm and away from LTE/antenna trace.
Important Design Decisions
- Preserve separate GND_STAR and GND_RELAY nets.
- Use optocoupler for relay control isolation.
- Use 4.0V dedicated regulator for LTE module.
- Use 200x140mm board to relieve routing congestion around LTE and power clusters.
Assumptions
- Uploaded DOCX is the controlling specification and replaces the previous LED blinker request.
- Exact Flux library availability may require acceptable equivalent parts when specified MPNs are unavailable.
- Power architecture from the spec will be checked against regulator thermal/current limits before finalizing.
Change Notes
- Initial project created from uploaded GLECS V4 Onboard 4G 200x140 schematic specification.
Project Overview
Intended Use
What the Device Should Do
Main Features
System Architecture
Hardware Subsystems
Power
MCU
Cellular
Relay Isolation
Sensors and Headers
Interfaces and Connections
Power Tree and Power Budget
Manufacturing and Assembly Expectations
Firmware-Relevant Hardware Requirements
Physical Design Expectations
Important Design Decisions
Assumptions
Change Notes
