Ultrasonic Emitter PCB Design
Thought
Work completed
- Updated project description with goals, features, and named nets
- Added core components: ESP32-WROOM-32E (U1), CP2102N USB-UART bridge (U2), TPS561208 buck regulator (U3)
- Integrated connectors & USB interface: USB-C (J1), CC pull-downs (R1/R2), USB ESD diode (D3)
- Added power input: 2-pin screw terminal (J2), TVS diode (D1)
- Placed U.FL antenna footprint (J10) and keep-out annotation
- Added test/program pads TP1–TP6 for 3V3, GND, TX, RX, EN, IO0
- Populated buck converter passives: L1, D2, C1–C7, R3/R4
- Configured EN/BOOT pull-ups (R7–R9) and decoupling capacitor (C4)
- Implemented reset & boot buttons (SW1/SW2)
- Placed MOSFET driver channels Q1–Q3 with gate resistors (Rg1–Rg3), pulldowns (Rpd1–Rpd3), thermal-via arrays, and transducer connectors (J3–J5)
- Added status LEDs (LED1–LED3) with resistors R14–R16
- Completed net wiring per spec for PWR_12V_IN, 3V3, GND, DRV_CHx, LED_NET/LED_PWR/LED_EMIT
Tasks unfulfilled
- Continuous ground plane optimization and wide power paths (layout task)
- USB D+/D– impedance matching and additional ESD on differential lines
- Placement of mounting holes and silkscreen labels
- ERC/DRC schematic checks for thermal via implementation under MOSFETs
Success criteria
- ✅ All major blocks (ESP32, USB, buck, MOSFETs) added and correctly net-named
- ✅ LEDs, reset button, U.FL, and programming pads present and functional
- ✅ ESD/TVS protection and thermal via arrays are in schematic
- ✅ RF/power partitioning organized in schematic
- ℹ️ Layout-specific items (ground plane, impedance, mounting) remain for PCB stage
Next step
Prepare the PCB layout: review footprints, define stackup and bump rules, set trace-width and via rules, then auto-place and auto-route.
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