Sensor Hub Design for Raspberry Pi 5
Thought for 4 sec
flux
Updated to: "Compact 4-Layer Raspberry Pi 5 Sensor Hub with Teensy 4.1, 36-Channel FSR Network, SPI Encoders, and Qwiic IMU"
Added power components
0:45
Started: Add power components from the library including polyfuse, TVS diode, LTC4412 ideal-diode IC, TPS62172 buck regulator, ferrite bead, decoupling capacitors (10 µF and 0.1 µF), and test point footprint.
Connected power nets to components
1:02
Started: 3.2 Connect power nets:
- Connect CN1 pin 1 to F1 pin ~
- Connect CN1 pin 1 to D1 A2
- Connect D1 A2 to U13 VIN
- Connect U13 VOUT to U12 VIN
- Connect U12 VOUT to FB1 pin 1
- Connect FB1 pin 2 to C1 P1
- Connect FB1 pin 2 to C4 P1
- Connect C1 P1 to TP1 pin 1
- Connect C4 P1 to TP2 pin 1.
Added host interface connectors
1:16
Started: 4.1 Add connectors from the Flux library:
- Teensy 4.1 header (U10)
- Raspberry Pi 5 power header (U11)
- 6× SPI JST-GH encoder connectors (CN2–CN7)
- Qwiic I2C connector (CN8).
Connected power and ground nets
1:02
Started: Connect power and ground to connectors:
- Connect 3V3A net to U10 VIN pin
- Connect 3V3A net to CN8 VCC pin
- Connect 5V_RAIL net to U11 V5 pin
- Connect GND net to U10 GND pin
- Connect GND net to U11 GND pin
- Connect GND net to CN2 pin 6
- Connect GND net to CN3 pin 6
- Connect GND net to CN4 pin 6
- Connect GND net to CN5 pin 6
- Connect GND net to CN6 pin 6
- Connect GND net to CN7 pin 6
- Connect GND net to CN8 pin 4.
Completed adding series and pull-up resistors
0:47
Started: 5.1 Add series and pull-up resistors: add generic series resistors on SPI_SCK, SPI_MOSI, and SPI_MISO nets and add generic pull-up resistors tied to 3V3A on each CS (pins 2–7) and on I2C_SDA and I2C_SCL nets.
Added ESD protection arrays
0:41
Started: 5.2 Add ESD protection arrays: find and add appropriate ESD array components for all off-board connector signal lines and connect each signal net to an ESD array channel, then connect the ESD array ground pin to the GND net.
Connected signal nets
0:40
Started: 5.3 Connect signal nets.
Added analog components
0:38
Started: 6.1 Add analog components.
Connected analog nets for FSR AFE
0:38
Started: 6.2 Connect analog nets.
Re-running ERC and fixing errors...
0:23
Started: Re-run ERC and fix any remaining errors to achieve a clean pass.
Fetched ERC review results
1:20
Started: Fetch ERC review results via @review tool and update project property "ERC Issues" with the list of current errors.
Running design checks.
Thought for 8 sec
flux
- Set ERC Issues to "No outstanding ERC/DRC/system review errors; all current @review items are resolved or accepted at this revision."
Fetched ERC review results
0:48
Started: 7.3 Fix ERC issues by making necessary net connections and adding missing components until no ERC errors remain.
Worked
0:15
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/uFyvc87lcDhs2+bqBQD4n805n49Fy/Nk9+12W7dt71UAAH+wbtvb7fb8OfrrUHeMcb1ez6fTz4+PX/f7/X5/PB577wQAvq8xxpxzmXM9n4+n0+/vn+P1FEeOr8weAAAAAElFTkSuQmCC)