Schematic for PCBWay 4 Layer Stackup: Compact 2-Layer ESP32-WROOM-...

Ultrasonic Emitter PCB Design

flux

0:00

Autopilot

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.

50 days

Plan completed.

Show Plan

J2 P1 - D1 A

C4 P2 - GND GND

R7 P1 - U1 3V3

J2 P2 - D1 K

GND

Resistance

500 Ω

Resistance

5.1kΩ

LED3

Inductance

2.2uH

Capacitance

100uF

LED1

LED2

Resistance

5.1kΩ

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 15

Des	Net	Des	Net
U1:IO0	IO0	R7:P1	3V3
J1:DB-	None	R7:P2	RSTb
J1:DB+	None	R7:P2	RSTb
J1:GND2	None	LED1:A	3V3
J1:GND3	None	LED1:A	3V3
J1:GND4	None	U1:IO0	IO0
J1:RX1-	None	R7:P1	3V3
J1:RX1-	None	U1:IO0	IO0
J1:RX1+	None	U1:IO0	IO0
J1:RX2+	None	LED1:A	3V3
J1:TX2+	None	LED1:A	3V3
J1:VBUS4	None	R7:P1	3V3
J1:VBUS4	None	U1:IO0	IO0
Q2:D	None	U1:GND	GND
Rg1:P1	None	J2:P2	GND

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides

Reports components that have been modified using the "!important" flag.

Airwires • 22

	Designators	Net
	C11:P1, C12:P1	3V3
	C11:P1, C13:P1	3V3
	C13:P1, R16:P1	3V3
	C14:P1, R9:P1	3V3
	LED1:A, R8:P1	3V3
	R7:P1, LED1:A	3V3
	R7:P1, U1:3V3	3V3
	R8:P1, R9:P1	3V3
	R14:P1, R16:P1	3V3
	R15:P1, C14:P1	3V3
	R15:P1, R14:P1	3V3
	U2:VDD, U1:3V3	3V3
	R8:P2, SW1:1	EN
	SW1:1, C4:P1	EN
	U1:EN, R8:P2	EN
	U2:GND, Via-4-5:Via-4-5	GND
	SW2:1, R9:P2	IO0
	U1:IO0, SW2:1	IO0
	C1:P1, U3:VIN	PWR_12V_IN
	D1:A, J2:P1	PWR_12V_IN
	U3:VIN, D1:A	PWR_12V_IN
	U2:RSTb, R7:P2	RSTb

Deprecated Rules

Reports nodes that are using rules that are not supported anymore.

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper

Detect any via, trace or copper fill island that is not connected to any net.

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Manufacturing

Manufacturer Part Number • 34

	Designator	MPN
	C1	None
	C4	None
	C8	None
	C9	None
	C10	None
	C11	None
	C12	None
	C13	None
	C14	None
	L1	None
	LED1	None
	LED2	None
	LED3	None
	R1	None
	R1	None
	R2	None
	R7	None
	R8	None
	R9	None
	R14	None
	R15	None
	R16	None
	Rg1	None
	Rg2	None
	Rg3	None
	Rpd1	None
	Rpd2	None
	Rpd3	None
	TP1	None
	TP2	None
	TP3	None
	TP4	None
	TP5	None
	TP6	None

Parts Available

Beta

Checks that all parts have a part number and are available from distributors.

System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

Learn more

Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

Learn more

Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Inspect

PCBWay 4 Layer Stackup

Controls

Properties

Board Thickness

1.6 mm

Inner Layers Copper Thickness

1 oz

Outer Layers Copper Thickness

0.5 oz

Preferred Distributors

Availability & Pricing

Distributor		Qty 1
	Arrow	$6.58–$10.37
	Digi-Key	$12.30–$14.32
	LCSC	$18.75–$18.88
	Mouser	$7.75
	TME	$1.37
	Verical	$9.78–$17.65

Assets

Thumbnail

pcbway-4L.png

id=pcbway-4L

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