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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:

Image

Net: node_9cb2b1d3207df54b01c1f6e4302a6654
Net: node_2e79598adb9cc0973589b99d9a0262d4
Net: abb6c0094b0f5d45c059501b1638c974
P1
P2
A1, A2
Connection to load and feedback network
9cb2b1d3207df54b01c1f6e4302a6654
To Load and Feedback Network
U1:FB (LM2678SD-5.0/NOPB)
2e79598adb9cc0973589b99d9a0262d4
C2 (100u)
J1:VBUS
J2:VBUS
D1 (PDS760-13)
C1 (0.01u)
L1 (Inductor)
U1:SW (LM2678SD-5.0/NOPB)
abb6c0094b0f5d45c059501b1638c974
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
    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 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
    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 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
    jharwinbarrozo
    1.5M
  • Generic Inductor
    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
    jharwinbarrozo
    15.1k
  • 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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Raspberry Pi 4 Hat Template

Raspberry Pi 4 Hat Template
Created
Last updated by debbi763763
6 Contributor(s)
wokeengineer
yoitsjigs
frankinstine
avivasapphirebenquadinaros491957
+2

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