MACHIP3.0

MACHIP 3.0 Hardware Terminal (PCB & Schematic)

This directory contains the official KiCad 8/10 hardware design files, production Gerbers, bill of materials (BOM), and assembly guides for the MACHIP 3.0 Access Control Terminal.

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Quick Navigation

• KiCad Project File: MACHIP3.0.kicad_pro
• Schematic File: MACHIP3.0.kicad_sch
• PCB Layout File: MACHIP3.0.kicad_pcb
• Production Gerbers (JLCPCB Ready): MACHIP3.0_JLCPCB_READY.zip
• Verified Component BOM (LCSC): MACHIP3.0_JLCPCB_BOM_CORRECTED.csv
• Hardware Assembly & Bring-Up Guide: MACHIP3_HARDWARE_BRINGUP_AND_ASSEMBLY_GUIDE.md
• Pre-Fab Engineering Audit Report: MACHIP3_PCB_LAYOUT_AUDIT_REPORT.md

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How to Open on Your Laptop

Option 1: In KiCad (Full Design & Editing)

1. Install KiCad 8.0+ (or KiCad 10).
2. Clone this repository or download this folder.
3. Open KiCad $\to$ File $\to$ Open Project $\to$ Select MACHIP3.0.kicad_pro.
4. Custom Footprints & Symbols: The included fp-lib-table, sym-lib-table, and machip_footprints.pretty/ will load all custom footprints automatically without library warnings.

Option 2: In Web Browser (No Installation Needed!)

You can view the schematic and PCB interactively online:

1. Go to kicanvas.org.
2. Drag and drop MACHIP3.0.kicad_sch or MACHIP3.0.kicad_pcb directly into your browser.

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Hardware Specifications

• Controller: ESP32-WROOM-32 (38-Pin DevKit Socket)
• Operating Voltage: 9.0V DC Regulated Input (5.5mm × 2.1mm Center-Positive Barrel Jack)
• Onboard Regulators:
  • U1 (LM7805 TO-220 + Aluminum Heatsink): 5V System Bus
  • U3 (RT9080-33GJ5 SOT-23-5): 3.3V Logic Rail (600mA Low-Dropout)
• Peripherals Supported:
  • J2: Inside MFRC522 RFID Reader (SPI, 7-Pin JST-XH)
  • J3: Outside MFRC522 RFID Reader (SPI, 7-Pin JST-XH)
  • J4: Outside ST7789 TFT Display (SPI, 9-Pin JST-XH)
  • J5: Inside ST7789 TFT Display (SPI, 9-Pin JST-XH)
  • J6: R307 Optical Fingerprint Sensor (UART, 4-Pin JST-XH)
  • J7: Active Buzzer Module (3-Pin JST-XH)
  • J8: 12V Door Strike / Maglock Relay Driver (3-Pin JST-XH)
• Protection:
  • Reverse Polarity: P-Channel MOSFET (AO3401) + Zener (BZT52C10)
  • Overcurrent: Resettable PTC Fuse (RXEF110, 1.1A Hold)
  • Overvoltage / Surge: Bidirectional TVS Diode (SMBJ10CA)
  • ESD Protection: Multichannel TVS Arrays (ESDSRV05-4) on peripheral lines
• Dimensions: $111.5,\text{mm} \times 101.0,\text{mm}$ (2-Layer FR-4, 1.6mm thickness, 1 oz copper)
• Mounting: 4× M3 Mounting Holes (H1–H4) with $>6.5,\text{mm}$ annular clearance