WiFi Water Flow Meter Design

Updated 18 connections

0:10

Connected J1:GND_A, J1:GND_B, D1:A, R1:P2, R2:P2, C1:P2, C2:P2, U1:GND, U2:GND_1, U2:GND_2, U2:GND_3, U2:GND_4, U2:GND_5, U2:GND_6, U2:GND_7, U2:GND_8, U2:GND_9, U2:GND_10, U2:GND_11, J2:2, J3:2, SW1:2, SW2:2, LED2:K, LED3:K, C3:P2, C4:P2, C5:P2, C6:P2, C6:P2, LED1:K to ^GND

Connected J1:VBUS_A, J1:VBUS_B, D1:K, Q1:S, R4:P1 to ^USB_5V_IN

Connected Q1:G, R3:P1 to ^USB_GATE

Connected Q1:G, Q1:D, R3:P2, R4:P2, U1:VIN, C1:P1, D1:K to ^VUSB_PROT

Connected J1:CC1, R1:P1 to ^USB_CC1

Connected J1:CC2, R2:P1 to ^USB_CC2

Connected U1:VOUT, U1:TAB(VOUT), U2:3V3, J2:1, J3:1, R5:P1, R6:P1, R8:P1, C2:P1, C3:P1, C4:P1, C5:P1 to ^3V3

Connected U2:EN, R5:P2, C6:P1, SW1:1 to ^ESP_EN

Connected U2:IO0, R6:P2, SW2:1 to ^ESP_BOOT

Connected U2:TXD0, J2:4 to ^UART_TX

Connected U2:RXD0, J2:3 to ^UART_RX

Connected U2:IO4, J3:3 to ^FLOW_TRIG

Connected J3:4, R7:P1 to ^FLOW_ECHO_IN

Connected R7:P2, U2:IO5, R10:P1 to ^FLOW_ECHO

Connected R8:P2, LED1:A to ^PWR_LED_DRV

Connected R9:P1, U2:IO6 to ^WIFI_LED

Connected R9:P2, LED3:A to ^WIFI_LED_R

Connected R10:P2, LED2:A to ^FLOW_LED_R

nets {

net GND = J1:GND_A, GND:GND, U2 GND_11 - J2 2:GND, LED1:K, C6:P2, C5:P2, C4:P2, C3:P2, LED3:K, LED2:K, SW2:2, SW1:2, J3:2, J2:2, U2:GND_11, U2:GND_10, U2:GND_9, U2:GND_8, U2:GND_7, U2:GND_6, U2:GND_5, U2:GND_4, U2:GND_3, U2:GND_2, U2:GND_1, U1:GND, C2:P2, C1:P2, R2:P2, R1:P2, D1:A, J1:GND_B;

net USB_5V_IN = J1:VBUS_A, R4:P1, Q1:S, D1:1, J1:VBUS_B;

net USB_GATE = Q1:G, D1:3, C1:P1, U1:VIN, R4:P2, R3:P2, Q1:D, R3:P1;

net USB_CC1 = J1:CC1, R1:P1;

net USB_CC2 = J1:CC2, R2:P1;

net 3V3 = U1:TAB(VOUT), U1:VOUT, C5:P1, C4:P1, C3:P1, C2:P1, R8:P1, R6:P1, R5:P1, J3:1, J2:1, U2:3V3;

net ESP_EN = U2:EN, SW1:1, C6:P1, R5:P2;

net ESP_BOOT = U2:IO0, SW2:1, R6:P2;

net UART_TX = U2:TXD0, J2:4;

net UART_RX = U2:RXD0, J2:3;

net FLOW_TRIG = U2:IO4, J3:3;

net FLOW_ECHO_IN = J3:4, R7:P1;

net FLOW_ECHO = R7:P2, R10:P1, U2:IO5;

net PWR_LED_DRV = R8:P2, LED1:A;

net WIFI_LED = R9:P1, U2:IO6;

net WIFI_LED_R = R9:P2, LED3:A;

net FLOW_LED_R = R10:P2, LED2:A;

}

40 days

Updated properties for 12 objects

0:09

Set R8's Role Details to "Power LED current limit resistor from 3.3V rail"

Set R10's Role Details to "Flow activity LED current limit resistor driven by ESP32 IO5"

Set R9's Role Details to "WiFi status LED current limit resistor driven by ESP32 IO6"

Set C3's Role Details to "3.3V decoupling capacitor at ESP32 module supply"

Set C4's Role Details to "3.3V decoupling capacitor for sensor connector supply filtering"

Set C5's Role Details to "3.3V decoupling capacitor at UART/programming header rail entry"

Set C6's Role Details to "Enable pin RC filter capacitor from ESP32 EN to ground"

Set LED1's Role Details to "Power present indicator LED tied to 3.3V rail through resistor"

Set LED2's Role Details to "Flow detection status LED driven by ESP32 IO5"

Set LED3's Role Details to "WiFi status LED driven by ESP32 IO6"

Set J2's Role Details to "UART header pinout 1=3.3V 2=GND 3=RXD0 4=TXD0"

Set J3's Role Details to "Ultrasonic sensor connector pinout 1=3.3V 2=GND 3=TRIG 4=ECHO"

40 days

flux

0:00

Work done
  • Added and wired a complete USB-C powered flow meter schematic around J1, Q1, D1, U1, and U2
  • Implemented the ESP32 support circuitry with R5, R6, C6, SW1, SW2, and the UART header J2
  • Added the external sensor interface on J3 with signal nets for trigger and echo plus supply filtering, and added status indicators LED1, LED2, LED3
  • Updated the project specification document with the system architecture and implemented net intent
Success criteria review
  • ✅ The schematic includes USB-C 5 V input, CC pull-downs, ESD protection, reverse protection, and bulk/decoupling capacitors
  • ✅ A 3.3 V regulator and distribution network were implemented for the ESP32 and external sensor interface
  • ✅ The ESP32, UART programming header, ultrasonic sensor connector, and status LEDs are fully integrated and wired
  • ✅ Enable/reset guidance circuitry was added for the ESP32 boot and reset behavior
  • ✅ Review checks for missing power, undriven nets, single-pin nets, and pin conflicts returned clean results
Next steps The schematic is ready for refinement in Flux. A good next step is assigning preferred production MPNs/footprints or moving into PCB constraints and layout.
40 days
Sign up to send
U1 TAB(VOUT) - U2 3V3
R10 P2 - LED2 A
U2 IO4 - J3 3
R9 P2 - LED3 A
U2 EN - R5 P2
R7 P2 - U2 IO5
R8 P2 - LED1 A
U1 TAB(VOUT) - U2 3V3
U2 IO0 - R6 P2
R8 P2 - LED1 A
U1 TAB(VOUT) - U2 3V3
U2 EN - R5 P2
R9 P1 - U2 IO6
J1 CC2 - R2 P1
U1 TAB(VOUT) - U2 3V3
R10 P2 - LED2 A
U2 IO0 - R6 P2
R9 P2 - LED3 A
J1 CC1 - R1 P1
J3 4 - R7 P1
J3 4 - R7 P1
R7 P2 - U2 IO5
U2 GND_11 - J2 2
U2 GND_11 - J2 2
GND
U2 GND_11 - J2 2
GND
U2 GND_11 - J2 2
U2 GND_11 - J2 2
U2 GND_11 - J2 2
LED2
R5
Resistance
10kΩ
LED1
R6
Resistance
10kΩ
R7
Resistance
1kΩ
R9
Resistance
330 Ω
R10
Resistance
330 Ω
R1
Resistance
5.1kΩ
R2
Resistance
5.1kΩ
R8
Resistance
330 Ω
J3
LED3
SW1
SW2
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Net Portal
    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
    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
    Generic Resistor
    A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Capacitor
    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, 10000uF 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, 220pF, 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
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
    15.8k
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
    jharwinbarrozo
    1.1M
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