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Add a switch here
yoitsjigs

yoitsjigs

@copilot Add a switch here
1y

copilot

To add a switch to your Raspberry Pi 4 Hat template, you'll need to decide on its function. For instance, it can serve as a power switch, toggling the supply to the Raspberry Pi, or it might control a specific feature on the Hat itself.
Assuming the goal is to add a simple power toggle for the Raspberry Pi, you can incorporate a single-pole, single-throw (SPST) switch between the power source and the power net feeding the Raspberry Pi and the rest of the Hat's circuit. Here's how you could do it based on the project description you've provided:
  1. Select a Switch: Choose an SPST switch that can handle the current and voltage requirements of your Raspberry Pi 4. For example, the Raspberry Pi 4 can draw up to 3A under maximum load at 5V. Ensure the switch is rated for at least 3A at 5V.
  2. Add the Switch to Your Schematic:
    • Designator: SW1
    • Pins: 2 (typically named, 1 and 2 or IN and OUT)
    • Element Properties:
Assuming the +5V PowerNet is used both to power the Pi and to distribute power within the Hat, you can integrate the switch as follows:
  • Location: It's efficient to place the switch close to where the power enters the Hat to easily control power to the entire board.
  • Connections:
    1. Disconnect J1:VBUS from directly connecting to the +5V PowerNet and instead connect it to one terminal of the switch.
      • Connect J1:VBUS to SW1:1
    2. Connect the other terminal of the switch to the +5V PowerNet to distribute power when the switch is closed.
      • Connect SW1:2 to +5V:P1
By integrating the switch in this manner, you have an effective means to control power to your Raspberry Pi 4 Hat, ensuring you can easily turn it off or on without needing to disconnect the power source physically.
Remember, this is a basic implementation meant as a starting point. Depending on your specific use case or requirements (e.g., a soft power switch, controlled shutdown to prevent SD card corruption, etc.), the implementation details might vary.
1y
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create a high level mermaid block diagram of L1. Include key component's manufac...
yoitsjigs

yoitsjigs

@copilot can you suggest a few inductors to use
1y

copilot

For your Raspberry Pi 4 Hat project, selecting the appropriate inductor is crucial for various applications such as filtering, power supply, or RF circuits. The choice depends on the application's requirements like the desired inductance value, current handling capability, and size constraints. Given the information in your project, it seems like the inductor would likely be used in power management or filtering roles associated with the Raspberry Pi and peripherals' power supply.
Considering a typical power management application in your project, here are a few inductor choices from Bourns, based on different inductance values and their characteristics. Please cross-reference these suggestions with your specific requirements, such as maximum current (I rms) and saturation current (I sat), to ensure compatibility:
  1. For Moderate Inductance and High Current Applications:
    • Bourns Part No.: SRR1210-270M
      • Inductance: 27 µH
      • I rms (A): 5.0
      • I sat (A): 4.2
  2. For High Inductance and Moderate Current Applications:
    • Bourns Part No.: SRR1210-680M
      • Inductance: 68 µH
      • I rms (A): 3.0
      • I sat (A): 2.7
  3. For Low Inductance and Very High Current Applications:
    • Bourns Part No.: SRR1210-1R8Y
      • Inductance: 1.8 µH
      • I rms (A): 10.2
      • I sat (A): 13.2
  4. For High Inductance and Low Current Applications:
    • Bourns Part No.: SRR1210-820M
      • Inductance: 82 µH
      • I rms (A): 2.8
      • I sat (A): 2.5
Each of these inductors has its unique application based on the current requirements and inductance needed for your project. Ensure the chosen inductor fits into your design's physical space and meets any other specific requirements like the Quality factor (Q) or Self-Resonant Frequency (SRF) that might be critical for your application.
1y
yoitsjigs

yoitsjigs

@copilot create a high level mermaid block diagram of L1. Include key component's manufacturer part number in each block whenever possible.
1y

copilot

Certainly! Based on the project description you've provided, let's create a high-level Mermaid block diagram focusing on the inductor L1, its immediate connections, and including manufacturer part numbers (MPN) wherever possible.
For L1, we're noting its connection within the switching network of the voltage regulator circuit, specifically connected to the U1 (LM2678SD-5.0/NOPB) switching regulator and integral in forming the output stage with D1 (PDS760-13) and capacitors C1, C4, C5, and C6. The MPN for L1 isn't provided, so it will be marked as unspecified in the diagram.
Here is a text-based representation of the Mermaid diagram:
graph TD;
    L1["L1 (Inductor)"] --- |"P1"| FatPath["abb6c0094b0f5d45c059501b1638c974"];
    L1 --- |"P2"| L1_to_U1_FB["2e79598adb9cc0973589b99d9a0262d4"]

    subgraph abb6c0094b0f5d45c059501b1638c974[""Net: abb6c0094b0f5d45c059501b1638c974""];
        C1["C1 (0.01u)"] --> D1["D1 (PDS760-13)"];
        U1_SW["U1:SW (LM2678SD-5.0/NOPB)"] --> L1;
        L1 --> U1_SW;
    end

    subgraph node_2e79598adb9cc0973589b99d9a0262d4[""Net: node_2e79598adb9cc0973589b99d9a0262d4""];
        L1_to_U1_FB --> U1_FB["U1:FB (LM2678SD-5.0/NOPB)"];
        L1_to_U1_FB --> C2["C2 (100u)"];
        L1_to_U1_FB --> J1_VBUS["J1:VBUS"];
        L1_to_U1_FB --> J2_VBUS["J2:VBUS"];
    end

    U1_SW --> SW_to_D1["9cb2b1d3207df54b01c1f6e4302a6654"];

    subgraph node_9cb2b1d3207df54b01c1f6e4302a6654[""Net: node_9cb2b1d3207df54b01c1f6e4302a6654""];
        D1 --> |"A1, A2"| SW_to_D1;
        SW_to_D1 --> |"Connection to load and feedback network"| Load["To Load and Feedback Network"];
    end
Note: In this Mermaid syntax:
  • The blocks represent components and their respective MPNs when available or specified.
  • The connecting lines (--- and -->) represent electrical connections between components, with the line labels indicating the pin or the net number associated with that connection.
  • Due to the limitations of text representation, the precise layout of nets and their connections are simplified. The diagram illustrates L1's pivotal role in the buck converter configuration surrounding U1, C2's interaction with the 5V supply, and D1's connection to the switching node managed by U1.
  • "P1" and "P2" next to edges represent the connection points to and from L1 in the respective nets.
This abstracted view centers on L1 and its critical relationships with other components in the buck converter circuit. It doesn't encapsulate every detail of the circuit but highlights the most relevant connections based on your request.
1y
Someone is typing...
7
  • 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
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  • 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
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  • 875105359001
    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
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  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
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    1.1M
Raspberry Pi 4 Hat Template thumbnail
Template for Raspberry Pi 4 Shield. Include an official pinout so you will always know Raspberry Pi names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Raspberry Pi itself along with the board outline on the silkscreen. #RaspberryPi #Raspberry #Pi #RPi #Shield #template #project #project-template #raspberry

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