• Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
  • Ground
    A common return path for electric current. Commonly known as ground.
  • Net Portal
    A net identifier used to create connectivity to other Net Portal with the same designator. #portal
  • Power Net Portal
    Power net portal is a special schematic object used to define a power or ground net. Power ports allow you to conveniently indicate a power net at any location in the design. Power nets of the same designator automatically connect throughout your design #portal #power
  • 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
  • Generic Capacitor
    A generic fixed capacitor 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 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
  • 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
  • RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
  • 875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
  • CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
please review U6 and it's connected components. Are there any issues?

@copilot please review U6 and it's connected components. Are there any issues?
10mo
After reviewing the connections related to U6 (LTC3401EMS#TRPBF) and its associated components, here's a detailed analysis focusing on the connections as per the provided project description and the relevant LTC3401 datasheet excerpts.
U6: LTC3401EMS#TRPBF Connections:

  1. Vin Connection (Pin 3)

    • Connected through net 8e518ede73636a8a1a1202e4c19ca084 to L2:P1, VIN:P1 (multiple instances), and C11:P1.
    • Analysis: The LTC3401 can operate with an input range of 0.5V to 5.5V[1]. Ensure the provided VIN falls within this range. Also, considering the inductor and capacitor are connected correctly, this setup appears to be standard for power input smoothing and supply decoupling.
  2. VOUT (Pin 7)

    • Connected through net fdd7bd98dd9ab769dcf795b16dee66cc to D3:K, R19:P2, C9:P1, +3V3:P1 (multiple instances).
    • Analysis: This connection supports the output voltage distribution. Ensure the output requirements align with the capabilities of the LTC3401 and the needs of connected devices, especially since the LTC3401 can efficiently convert voltages with high efficiency[2]. Check connected components to confirm compatibility with the output voltage.
  3. Ground (GND, Pin 5)

    • Connected to C9:P2, C11:P2, R17:P1, C12:P2, R20:P1, R18:P1 through net 21c3c6d3056bc3b35372fd7fb60ef9d2.
    • Analysis: Ground connections are crucial for the common return path and noise reduction. This seems correctly implemented.
  4. FB (Feedback, Pin 8)

    • Connected with R17:P2 and R19:P1 via net 56cf4c15479043e73ce5a94464e9ed27.
    • Analysis: The feedback network using R17 and R19 is critical for regulating the output voltage. The values of these resistors determine the output voltage as per the LTC3401's feedback mechanism. Ensure these values are correctly calculated to achieve the desired VOUT, based on the formula provided in the LTC3401 datasheet or application notes.
  5. Switching Node (SW, Pin 4)

    • Connected to D3:A and L2:P2 through net a03e556dbbeb71fa842a0f125068eb4d.
    • Analysis: The connection with the Schottky diode (D3) and inductor (L2) is a part of the standard configuration for a boost converter. Verify the current rating of D3 and the inductance value of L2 to ensure they match the design requirements, incorporating switching frequency and desired output current.
  6. *Shutdown and Mode Select (MODE/SHDN, Pin 10 and Pin 2)

    • Not detailed in the description for connections, but it's essential to manage these pins correctly according to the desired operational mode (fixed frequency or burst mode)[3]. Ensure MODE/*SHDN pin is correctly configured based on the operating mode.
  7. Compensation Network (VC, Pin 9)

    • Connected to C10:P1 and C12:P1 through net 402d7d15528ab1d6b84a23e01bfd46ca.
    • Analysis: The compensation network consisting of C10 and C12 is crucial for stabilizing the feedback loop. Ensure these capacitor values are suitable for the desired transient performance and loop stability.
General Concerns and Recommendations:

  • Ensure that the inductance value of L2 and the ratings for D3 are adequate for the application's current and efficiency requirements, considering the operation of the LTC3401 at up to 3MHz with 1A switch current rating[1].
  • Verify the calculation of the feedback network resistors (R17 and R19) to ensure they set the correct output voltage as per your requirements and the LTC3401 design guidelines.
  • Check the compensation network components (C10 and C12) to confirm they are optimized for the operational frequency and load requirements, as this will impact the converter’s response to load transients and overall stability.
  • Review the operation mode of the LTC3401 (fixed frequency vs. burst mode) and confirm if the MODE/*SHDN pin is appropriately managed to suit power efficiency and noise requirements of your application.
Overall, the connections related to U6 appear to be generally consistent with the typical application circuit of a boost converter based on the LTC3401, assuming the unspecified details such as specific operation mode and exact output voltage requirement are correctly implemented.
[1] Page 1
[2] Page 7
10mo

SC - Detailed

SC - Detailed
Description

Created
March 8th 2024
Last updated by nico
10 months ago
1 Contributor(s)
nico

Controls

Properties

Sensors
High-precision temperature sensor, PM2.5 sensor, VOC sensor, and CO2 sensor.
Connectivity
Wi-Fi 802.11 b/g/n
Power Requirements
Rechargeable battery with a USB-C charging port.
Accuracy
Temperature sensor accuracy of ±0.5°C, PM2.5 sensor accuracy within ±10 µg/m³
Battery Life
Minimum of 30 days on a single charge under normal usage.
Operating Temperature
-10°C to 50°C
Humidity
10% to 90% non-condensing
Capacitor Derating
Derate max voltage to 60%
Resistor Tolerance
All resistors should be 1%

Availability & Pricing

DistributorQty 1
Digi-Key$16.04–$24.33
LCSC$77.65–$78.62
Mouser$69.27

Assets

    Simulation

    µs

    Simulation Speed

    generate a markdown-formated list of all the components that are missing in this...
    @copilot generate a markdown-formated list of all the components that are missing in this project. I need to know ifI need any decoupling capacitors, pull up or down resistors, connectors, etc.
    10mo
    Based on the provided project description and considering best practices in electronics design, here is a markdown-formatted list of missing components and recommendations for your EcoSense IoT Environmental Monitor project. These components are critical for ensuring the stability, reliability, and proper functionality of your design.
    Missing Components and Recommendations

    • Decoupling Capacitors: Every power pin on digital ICs should be decoupled with a capacitor close to the IC to stabilize the power supply and filter out high-frequency noise.

      • For U2 (STM32L476ZGT6P), a 0.1μF capacitor should be placed as close as possible to each VDD pin.
      • For U3 (BME280), a 0.1μF capacitor close to VDD.
      • For U4 (NORA-W106-00B), a 0.1μF capacitor close to VCC and VDD_SPI pins.
      • For U5 (SCD41-D-R1), a 0.1μF capacitor close to VDD.
      • For U6 (LTC3401EMS#TRPBF), a 0.1μF capacitor close to VIN and a 10μF capacitor between VIN and GND for input decoupling.
    • Pull-up/Pull-down Resistors: These are required for stabilizing input pins or configuring device modes.

      • I2C Bus (for sensors like U3): 4.7kΩ pull-up resistors on SDA and SCL lines.
      • Reset Line: If there's a reset line (e.g., NRST on U2), consider a 10kΩ pull-up resistor to ensure a defined level when not actively driven.
      • BOOT0 pin of U2: Requires a pull-down resistor (10kΩ) if you intend for the microcontroller to boot from its main flash memory.
    • USB Connector (for U1, PMS5003 sensor):

      • If data communication over USB is required, ensure you have a USB connector, like Micro-USB or USB-C, based on the design requirement, for U1's USB communication.
    • Connectors for Sensors and Peripherals:

      • For easy maintenance, replacement, or upgrades, consider adding connectors for each of the sensors (U1: PMS5003, U3: BME280, U5: SCD41-D-R1) and any other modular components.
    • Power Connectors:

      • USB-C connector for the charging port, considering designator J1 might already fulfill this role but ensure its specification matches the requirement for power delivery and data.
    • Protection Elements:

      • ESD Protection on USB and external interface pins.
      • TVS Diodes on the power input for transient voltage suppression.
    • Indicators:

      • LEDs for power status (connection to the net associated with +3V3 may serve this purpose if intended for power indication).
      • Charge Status Indicators if not integrated into the chosen charging IC.
    • Test Points:

      • For critical signals, VCC, GND, and data lines for troubleshooting and validation.
    Assumptions Made

    • The design did not explicitly list pull-up/pull-down resistors which are often needed for proper operation.
    • USB connectivity for programming or communication was not detailed past the connector, assuming standard data lines and potential for USB power.
    • ESD protection and other protective measures are assumed to be missing but recommended for a robust design.
    Please review these recommendations compared to your specific needs and constraints, adjusting values and selections based on your application and environment considerations.
    10mo
    Someone is typing...
    Checks that the power traveling across a given resistor is under its rating with 50% headroom.
    Learn more
    Checks that IC pins that require pull up or pull down resistors have them.
    Learn more
    Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.
    Checks that all parts have a part number and are available from distributors.
    Des
    Net
    Des
    Net
    P8
    GND
    P4
    Net 3
    P8
    GND
    P5
    Net 1
    P8
    GND
    GND_2
    P3
    Net 6
    DNC_14
    P3
    Net 6
    DNC_13
    P4
    Net 3
    GND_2
    P4
    Net 3
    VDDH
    P2
    Net 7
    PC15
    P2
    Net 7
    PC14
    +3V3
    Net 12
    Trace 324a
    SDO
    Net 15
    Trace 324a
    SDO
    Net 15
    Trace 324a
    SDO
    Net 15
    Trace 324a
    SDO
    Net 15
    2
    SDI/SDA
    Net 14
    Via
    SDI/SDA
    Net 14
    Trace 324a
    Trace 324a
    SDI/SDA
    Net 14
    Trace 324a
    SDI/SDA
    Net 14
    Trace 324a
    CSB
    Net 11
    Trace 324a
    SCL/SCK
    Net 10
    Trace 324a
    SCL/SCK
    Net 10
    SCL/SCK
    Net 10
    Trace 324a
    Trace 324a
    SCL/SCK
    Net 10
    Via
    SCL/SCK
    Net 10
    Trace 324a
    GND
    Net 13
    GND
    Net 13
    Trace 324a
    Trace 324a
    K
    Net 13
    K
    Net 13
    Trace 324a
    P2
    Net 12
    Trace 324a
    P2
    Net 12
    Trace 324a
    P2
    Net 12
    Trace 324a
    PIN1
    Net 13
    Trace 324a
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    PIN1
    Net 13
    PIN2
    Net 12
    Trace 324a
    B
    Net 11
    Trace 324a
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    B
    Net 11
    A
    Net 12
    Trace 324a
    A
    Net 12
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    A
    Net 12
    Trace 324a
    PIN1
    Net 13
    Trace 324a
    PIN2
    Net 12
    Trace 324a
    VDD
    Net 12
    Trace 324a
    Trace 324a
    VDD
    Net 12
    CSB
    Net 11
    Trace 324a
    Trace 324a
    VDDIO
    Net 12
    GND
    Net 13
    Trace 324a
    Trace 324a
    GND
    Net 13
    Trace 324a
    2
    Net 12
    Trace 324a
    Pin_1
    Net 10
    Pin_3
    Net 12
    Trace 324a
    Pin_6
    Net 15
    Trace 324a
    Pin_4
    Net 13
    Trace 324a
    Pin_2
    Net 14
    Trace 324a
    Trace 324a
    Pin_2
    Net 14
    Pin_5
    Net 11
    Trace 324a
    1
    Net 13
    Trace 324a
    1
    Net 13
    Trace 324a
    Trace 324a
    P1
    Net 12
    P1
    Net 12
    Trace 324a
    Trace 324a
    P1
    Net 12
    P1
    Net 12
    Trace 324a
    P2
    Net 13
    Trace 324a
    Trace 324a
    P2
    Net 13
    B
    Net 12
    Trace 324a
    Trace 324a
    P1
    Net 12
    Trace 324a
    P1
    Net 12
    P1
    Net 12
    Trace 324a
    Trace 324a
    P1
    Net 12
    Trace 324a
    P2
    Net 13
    Trace 324a
    P2
    Net 13
    Designator
    PMS5003 U1
    Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.
    Designator
    Ruleset
    Layout
    Designators
    Net
    P7, P8
    GND
    MODE, P3
    Net 6
    P1, VOUT, P4, P2, K
    Net 3
    PGOOD, P6
    Net 8
    RT, P2
    Net 9
    P1, VC, P1
    Net 4
    P5, *SHDN, P1, P1, VIN
    Net 1
    FB, P2, P1
    Net 5
    A, SW, P2
    Net 2
    GND, GND, GND
    Net 18
    P2, P2
    Net 7
    Reports nodes that are using rules that are not supported anymore.
    Layer
    Net
    All
    GND, GND
    Name
    Trace 2998
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