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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
3
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
https://cdn2.flux.ai/flux-comment-files/files/commentFileId-458257244cdd9edbb884...

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1y
2
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


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Raspberry Pi plant monitoring HAT

Raspberry Pi plant monitoring HAT thumbnail
Plant monitoring HAT for Raspberry Pi 4 model B with light intensity, temperature, humidity, CO2 sensing, and camera attachment

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$36.17–$41.47

Digi-Key

$52.61–$55.35

LCSC

$65.54

Mouser

$62.31

Verical

$42.11–$43.99

Controls