• 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
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2mo
Someone is typing...
please explain what U2 does.

@copilot please explain what U2 does.
2mo
The component U2, with the manufacturer part number AP7331-33WG-7, is a Low-Dropout Regulator (LDO). Here is a brief explanation of its function:
  • Voltage Regulation: The primary function of U2 is to provide a stable output voltage $3.3V$ in this case from a higher input voltage, even with variations in input voltage or load current.
  • Low Dropout Voltage: The LDO’s design allows it to maintain the regulated output voltage with a relatively small difference between input and output voltage, which is the "dropout voltage."
  • Efficiency: Typically, LDOs are used in applications where power efficiency is important, especially when the input to output voltage difference is small.
  • Noise Filtering: LDOs are often used to reduce voltage noise in sensitive electronic circuits.
  • Enable Pin: U2 includes an enable pin, which allows the regulator to be turned on or off. This feature can help conserve power.
In your project, it seems to stabilize the $3.3V$ supply line necessary for various components, ensuring they operate correctly without unexpected drops or fluctuations in voltage. If you have specific areas you would like more detail on, feel free to ask!
2mo
Someone is typing...
9
what is q2 doing

@copilot what is q2 doing
2mo
In your project, Q2 is designated as a transistor with the part number RU1C001ZPTL. This specific component is a MOSFET, typically used as a switch or amplifier in electronic circuits.
Based on the provided net connections for Q2, here are some insights into its role:
  • Gate (G): Connects to the net labeled VUSB via a diode D2 and through resistor R10 to the Gate of Q2. This connection suggests that Q2 is controlled by the voltage present in the VUSB net, which could imply conditional powering or enablement based on USB connection status.
  • Source (S): Connects to the "Net 2," which includes various components such as the battery and the charging IC connection for battery voltage input, suggesting control over power management.
  • Drain (D): Connects to the "Net 50," which includes a few resistors and is connected to the negative side of the battery. This indicates that Q2 may act as a switch to disconnect or connect the battery circuit.
Overall, Q2 is likely being used as a power switch that regulates the connection between the USB power or signaling and the battery subsystem, depending on other conditions or controller logic not visible just from these connections.
2mo
Someone is typing...
10
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2mo
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1
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2mo
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2mo
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2mo
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4
C39
Capacitance
0.1u F
C37
Capacitance
TBD F
C36
Capacitance
TBD F
L2
Inductance
TBD H
SW3
ANT1
R12
Resistance
5.1k Ω

Biskuit AI: Project Showcase

Biskuit AI: Project Showcase
Description

Created
Last updated by collinsemasi
1 Contributor(s)
collinsemasi

Controls

Properties

Domain
Consumer Electronics
Compliance
RoHS, REACH
Operating Voltage
3.3
Operating Temperature
-20 to 50
Reliability Target (MTBF)
10000 hours
Power Requirements
Battery
Connectivity
WiFi, Bluetooth
Human Interface
Button, Display
Battery Lifetime
150hrs
Construction
Aluminum body
IP Rating
IP68
Device Input
Microphone Array
Software compatibility
IOS, WINDOWS, ANDROID
Description
Biskuit is a compact, ESP32-S3-powered wearable device designed for real-time transcription and effortless note-taking. Featuring a 3-microphone array and wireless communication to sync to to the cloud instantly.

Availability & Pricing

DistributorQty 1
Arrow$4.27–$5.32
Digi-Key$10.27–$10.98
LCSC$10.48–$20.02
Mouser$16.52
Verical$1.58–$6.41

Assets

Simulation

µs

Simulation Speed

Pi Matching Network Design

connect L2, C36, and C37 to form a pi impedance matching network and then connect the antenna ANT1 and U4 to the network

Using

General
Project Schematic
C36
C37
L2
LoRa_TX
Below is a suggested schematic update to form a pi impedance matching network with the selected components. The intent is to use the two shunt capacitors ([C36] and [C37]) and the series inductor ([L2]) so that one capacitor is connected at the source side (from [U4] to ground), the series inductor bridges to a new node, and the second capacitor is connected from that node to ground. The antenna ([ANT1]) is then connected at the network’s output node.
Schematic Update Suggestion:
  1. Source Side:
    • From the [U4] RF output, create a node.
    • Connect [C36] between this node and ground.
  2. Series Element:
    • Connect [L2] in series from the [U4] node (after [C36] is tapped) to a new node.
  3. Load Side:
    • Connect [C37] between the new node and ground.
    • Attach [ANT1] to this new node (this now becomes the output of the pi matching network).
You can use the "Apply changes" button to update your schematic with these connections.
Direct Pi Network Wiring
Reconfigure to Form Pi Network
Create Pi Matching Network
Set Up Pi Impedance Network
add a led to a free pin

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.
Reports issues with Auto-Layout if Copilot cannot route something or must ignore a configuration.
Reports copper elements that are shorting.
Reports parts that have no footprint.
Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.
Designator
Ruleset
Reports nodes that are using rules that are not supported anymore.
Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.
Detect any via, trace or copper fill island that is not connected to any net.