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Given OpAmp current draw to be around ~7mA, what resistors values could be chose...

@copilot Given OpAmp current draw to be around ~7mA, what resistors values could be chosen?
1y
To determine the resistor values for an operational amplifier configuration, it's important to know the specific configuration you're considering—such as inverting, non-inverting, voltage follower, etc.—and the input and output requirements.
However, if you're focusing on the TLV2372ID in your schematic, which is a dual op-amp, we can make some general suggestions based on common configurations:
  1. Power Supply Consideration: Since the op-amp's quiescent current is around 7mA, ensure that your power supply can handle this current in addition to any load current.
  2. Voltage Gain Configuration: The resistors around an op-amp are often selected based on the desired gain. For example:
    • Inverting Amplifier: G=RfRinG = -\frac{R_f}{R_{in}}
    • Non-Inverting Amplifier: G=1+RfRgG = 1 + \frac{R_f}{R_{g}}
    Where $R_f$ is the feedback resistor, $R_{in}$ or $R_g$ is the input or ground resistor, and $G$ is the gain.
  3. Typical Values:
    • For general-purpose applications, choosing resistor values between 1kΩ and 100kΩ is a good starting point.
    • If minimal power consumption is needed, use higher value resistors, but be aware of potential noise issues.
  4. Feedback Network: For a simple voltage follower where no gain is needed, you typically don't require additional resistors since the output is fed directly to the inverting input.
  5. Load Considerations: Ensure that the resistors can handle the load current and that the output impedance is compatible with your circuit requirements.
Please let me know if you have a specific configuration in mind or if you need more detailed calculations.
1y
are there any issues in this project?

@copilot are there any issues in this project?
1y
Upon reviewing the project's components and connections, here are some potential issues and suggestions:
  1. Duplicate Designators:
    • The designator CAM_D1_P is listed twice. Ensure each component in the project has a unique designator.
  2. Power Connections:
    • Ensure all components that require power have connections to appropriate power nets. In this project, make sure U1 (TLV2372), U2 (ADS1115), and U3 (SCD41) have their power pins correctly connected to the 3.3V net. It seems U1 is missing an explicit ground connection, verify if it is correctly implemented in Net: GND.
  3. Floating Inputs:
    • Check for any floating inputs like U1$:-IN 1$ and U1$:-IN 2$, and ensure they are connected to valid signals or properly terminated.
  4. I2C Connections:
    • Make sure that both serial clock (SCL) and serial data (SDA) lines are properly connected for I2C communication. In this case, U2 and U3 should be correctly connected. Verify the connections:
      • For U2, ensure U2:SCL is connected to the I2C clock net, and U2:SDA is connected to the I2C data net.
      • For U3, ensure U3:SCL is connected to the I2C clock net, and U3:SDA is connected to the I2C data net.
  5. Shared Nets:
    • Double-check shared nets such as Net 4, Net 6, etc., to ensure they serve the intended purpose and do not introduce unintentional connections.
  6. Connection Completeness:
    • Ensure that all required pins for functional blocks like the sensor U3 and ADC U2 are connected properly, based on the desired functionality you want to achieve.
I recommend verifying these points against the schematic and making sure all connections are as intended. If any assumptions are incorrect or further clarification is needed, feel free to provide more details.
1y
4
R1
Resistance
2400 Ω
GPIO2
U1
GPIO3
CAM_SCL
3.3V
R3
Resistance
2400 Ω
GPIO2
R2
Resistance
2400 Ω
3.3V
GPIO3
GPIO2
CAM_D1_N
CAM_SDA
GPIO3
J1
C_3V3
3.3V


  • Ground
    A common return path for electric current. Commonly known as ground.
  • 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
  • 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
  • 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 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
  • 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
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
  • 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

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Raspberry Pi plant monitoring HAT

Raspberry Pi plant monitoring HAT
Description

Created
Last updated by sudheep
1 Contributor(s)
sudheep

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