Schematic for ESP32 Dual Ultrasonic Water Level Monitoring System:...

Ultrasonic Sensor Selection

flux

0:43

General

Chat History

Project

Schematic

Using Schematic Tool.

Here’s your schematic index: components and brief descriptions.

Major ICs and Modules

U1 ESP32-WROOM-32D — WiFi/BLE microcontroller module.
U2 LM2596S-5.0/NOPB — 5 V buck regulator IC.
U12 AMS1117-3.3 — 3.3 V linear regulator.

Power and Protection

C5 680 uF electrolytic — Buck input reservoir.
C6 220 uF electrolytic — Buck output reservoir.
C1, C7, C8, C9 10 uF — Decoupling/bulk caps.
L1 33 uH inductor — Buck output inductor.
D5 SS34 — Schottky rectifier for buck stage.
Power portals: 7-30V, 5V, 3V3, and multiple Ground symbols tying to GND net.

Relays and Indicators

RL1, RL2, RL3, RL4 — 5 V relay module headers (VCC, GND, IN, indicator).
Indicator LEDs: LED1, LED2, LED3, LED4 — Status indicators for each relay.
Series resistors: R7, R8, R9, R10 — LED current-limiters.
Enable pull-up/boot parts: R5 10 kΩ to 3V3 for IO0/boot, R6 10 kΩ to EN.

Connectors and IO

Main headers: J1 2x10, J2 2x10.
Peripheral headers: J3 1x6, J5 1x4 (I2C), J6 1x4 (I2C), J11 1x6 (ultrasonic).
Power input: J4 TE 282837-3 3-pin terminal for VIN/GND/?
Push buttons: IO0 PTS636, EN PTS636.
Mounting: M3, M4 — M3 holes.

Signal Portals (ESP32 IO nets and labels)

I2C: SDA, SCL to U1 IO21/IO22 and headers J5/J6.
UART: RXD, TXD via headers.
SPI/SDIO lines: SD0, SD1, SD2, SD3, CMD, CLK.
ADC and misc: VP, VN, IO14, IO12, IO13, IO15, IO16, IO17, IO18, IO19, IO21, IO22, IO23, IO27, IO34, IO35, IO2, IO0, EN.
Ultrasonic channel portals:
- Channel 1: ULTRASOUND TRIGGER 1, ULTRASOUND ECHO 1.
- Channel 2: ULTRASOUND TRIGGER 2, ULTRASOUND ECHO 2.

Notes/Text

POWER SECTION, OLED DISPLAY, MODULAR RELAY 4X — documentation labels (not in BOM).

If you want, I can also list all nets with their connected pins, or filter by a subsystem (power, I2C, ultrasonic, relays).

65 days

Ready.

U12

AMS1117-3.3

IO14

ULTRASOUND TRIGGER 2

IO0

IO18

IO19

IO13

Resistance

4.7k Ω

IO35

Relay3

IO2

TXD

IO5

CMD

3V3

TXD

IO22

IO35

SD1

Relay3

IO23

IO0

ULTRASOUND ECHO 2

Capacitance

680u F

RL2 STATUS

SD3

LED2

IO34

SD1

IO15

Relay2

IO15

Relay1

IO4

IO5

IO17

Relay4

Resistance

10k Ω

TXD

LED1

SD0

RL4 STATUS

3V3

R10

Resistance

4.7k Ω

POWER SECTION

IO5

3V3

RL1

RL2

IO27

RXD

Relay1

SD3

SDA

IO18

RXD

RL2 STATUS

Relay3

SD0

OLED DISPLAY

IO34

SDA

SCL

IO22

IO17

Relay4

LED4

CLK

Capacitance

10u F

IO13

Resistance

4.7k Ω

3V3

LED3

IO0

J11

Resistance

4.7k Ω

IO21

IO23

IO4

Relay2

ULTRASOUND TRIGGER 1

SDA

Relay4

CLK

ULTRASOUND ECHO 1

Capacitance

220u F

IO16

SD2

Manufacturer Part Number

LM2596S-5.0/NOPB

SCL

IO27

RL1 STATUS

RL3 STATUS

Capacitance

10u F

IO22

ULTRASOUND ECHO 1

Capacitance

10u F

MODULAR RELAY 4X

IO14

Capacitance

10u F

RL4

SCL

3V3

Relay1

Resistance

10k Ω

ULTRASONIC SENSOR CONNECTOR

RXD

IO2

EN1

IO13

Relay2

ULTRASOUND TRIGGER 1

3V3

IO16

RL4 STATUS

Manufacturer Part Number

ESP32-WROOM-32D

IO0

ULTRASOUND ECHO 2

RL3

7-30V

IO21

ULTRASOUND TRIGGER 2

SD2

IO0

7-30V

CMD

Inductance

33u H

IO19

IO27

IO12

IO21

RL1 STATUS

RL3 STATUS

IO12

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 51

Des	Net	Des	Net
Trace 6ca5	COM	RL2:COM	COM
Trace 6ca5	COM	RL2:PIN2	COM
Trace 6ca5	COM	RL2:PIN2	COM
Trace b7c1	COM	RL4:COM	COM
Trace b7c1	COM	RL4:PIN2	COM
Trace b7c1	COM	RL4:PIN2	COM
Trace cfe2	COM	RL3:COM	COM
Trace cfe2	COM	RL3:PIN2	COM
Trace cfe2	COM	RL3:PIN2	COM
Trace 6ca5	NC	RL2:NC	NC
Trace 6ca5	NC	RL2:NC	NC
Trace 6ca5	NC	RL2:PIN3	NC
Trace b7c1	NC	RL4:NC	NC
Trace b7c1	NC	RL4:NC	NC
Trace b7c1	NC	RL4:PIN3	NC
Trace cfe2	NC	RL3:NC	NC
Trace cfe2	NC	RL3:NC	NC
Trace cfe2	NC	RL3:PIN3	NC
RL2:1	Net 2	Trace 6ca5	Net 2
RL2:P2	Net 2	Trace 6ca5	Net 2
RL3:1	Net 2	Trace cfe2	Net 2
RL3:P2	Net 2	Trace cfe2	Net 2
RL4:1	Net 2	Trace b7c1	Net 2
RL4:P2	Net 2	Trace b7c1	Net 2
Trace 6ca5	Net 6	RL2:B	Net 6
Trace 6ca5	Net 6	RL2:P1	Net 6
Trace 6ca5	Net 6	RL2:P1	Net 6
Trace b7c1	Net 6	RL4:B	Net 6
Trace b7c1	Net 6	RL4:P1	Net 6
Trace b7c1	Net 6	RL4:P1	Net 6
Trace cfe2	Net 6	RL3:B	Net 6
Trace cfe2	Net 6	RL3:P1	Net 6
Trace cfe2	Net 6	RL3:P1	Net 6
RL2:3	Net 10	Trace 6ca5	Net 10
RL2:3	Net 10	Trace 6ca5	Net 10
RL2:P2	Net 10	Trace 6ca5	Net 10
RL3:3	Net 10	Trace cfe2	Net 10
RL3:3	Net 10	Trace cfe2	Net 10
RL3:P2	Net 10	Trace cfe2	Net 10
RL4:3	Net 10	Trace b7c1	Net 10
RL4:3	Net 10	Trace b7c1	Net 10
RL4:P2	Net 10	Trace b7c1	Net 10
Trace 6ca5	NO	RL2:NO	NO
Trace 6ca5	NO	RL2:NO	NO
Trace 6ca5	NO	RL2:PIN1	NO
Trace b7c1	NO	RL4:NO	NO
Trace b7c1	NO	RL4:NO	NO
Trace b7c1	NO	RL4:PIN1	NO
Trace cfe2	NO	RL3:NO	NO
Trace cfe2	NO	RL3:NO	NO
Trace cfe2	NO	RL3:PIN1	NO

Invalid Layer

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

Component Overrides • 44

	Designator	Ruleset
	Fab Shapes	Override rule for Fab Shapes
	Model	Hide J1 3D model
	Model	Hide J3 3D model
	Model	Hide J2 3D model
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀VALUE｀＊	Override rule for ＊｀VALUE｀＊
	LM2596S-5.0/NOPB	Override rule for LM2596S-5.0/NOPB
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes
	Silk Shapes	Override rule for Silk Shapes

Airwires

Reports missing routed traces between pads in a net.

Deprecated Rules

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

Layers with Multiple Fills • 1

	Layer	Net
	All	GND, GND, GND, GND, GND

Floating Copper • 27

	Name
	Via
	Trace 6ca5, Through-hole - 1
	Trace 6ca5
	Trace 6ca5
	Trace 6ca5
	Trace 6ca5
	Trace 6ca5
	Trace b7c1, Through-hole - 1
	Trace b7c1
	Trace b7c1
	Trace b7c1
	Trace b7c1
	Trace b7c1
	Trace cfe2, Through-hole - 1
	Trace cfe2
	Trace cfe2
	Trace cfe2
	Trace cfe2
	Trace cfe2
	Via
	Trace 5b0c
	Trace 04e5, Trace 506a
	Trace 55ff
	Trace 6aee
	Trace 4184, Trace a6db, Trace 61ff, Trace c720
	Trace 249a, Trace 93dd, Trace d40a
	Trace ff5b

Protected Intrusions

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

Manufacturing

Manufacturer Part Number • 25

	Designator	MPN
	C1	None
	C5	None
	C6	None
	C7	None
	C8	None
	C9	None
	J1	None
	J2	None
	J3	None
	J5	None
	J6	None
	J11	None
	L1	None
	LED1	None
	LED2	None
	LED3	None
	LED4	None
	M3	None
	M4	None
	R5	None
	R6	None
	R7	None
	R8	None
	R9	None
	R10	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.

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Pull Up/Pull Down Presence

Beta

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

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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

ESP32 Dual Ultrasonic Water Level Monitoring System

Controls

Properties

Availability & Pricing

Distributor		Qty 1
	Arrow	$4.74–$6.32
	Digi-Key	$9.03–$10.04
	LCSC	$2.50–$3.16
	Mouser	$8.62–$8.79
	TME	$7.55
	Verical	$4.42–$7.34

Assets

Thumbnail

project-3d.png

id=project-3d

square.svg

id=square

ultrasonic.svg

id=ultrasonic

3d Model

SSD1306_OLED_Display-128x64.step

id=SSD1306_OLED_Display-128x64

Default

layout-shape.svg

id=layout-shape

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