Sensor Hub Design for Raspberry Pi 5

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.

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

R6 P1 - CN1 5
R34 P1 - C8 P1
R26 P1 - CN1 4
R6 P1 - CN1 5
R35 P1 - C9 P1
R20 P1 - CN1 2
CN7 2 - R8 P1
CN1 1 - F1 ~
R6 P2 - R1 P2
CN7 1 - R7 P1
R14 P1 - CN1 3
C1 P1 - C4 P1
R34 P1 - C8 P1
R6 P1 - CN1 5
R26 P1 - CN1 4
R26 P1 - CN1 4
R20 P1 - CN1 2
R20 P1 - CN1 2
R33 P1 - C7 P1
R35 P1 - C9 P1
CN1 1 - F1 ~
C1 P1 - C4 P1
R6 P1 - CN1 5
CN1 1 - F1 ~
R6 P1 - CN1 5
R14 P1 - CN1 3
R6 P2 - R1 P2
R33 P1 - C7 P1
R34 P1 - C8 P1
R26 P1 - CN1 4
R20 P1 - CN1 2
R26 P1 - CN1 4
R14 P1 - CN1 3
R20 P1 - CN1 2
CN7 2 - R8 P1
R14 P1 - CN1 3
R14 P1 - CN1 3
R35 P1 - C9 P1
R26 P1 - CN1 4
R26 P1 - CN1 4
R14 P1 - CN1 3
CN7 1 - R7 P1
R20 P1 - CN1 2
R14 P1 - CN1 3
R6 P1 - CN1 5
R33 P1 - C7 P1
R6 P1 - CN1 5
CN1 1 - F1 ~
CN1 1 - F1 ~
R20 P1 - CN1 2
U11
U5
U10
U2
U4
U1
U6
U12
U3
R35
Resistance
1kΩ
R38
Resistance
10kΩ
R57
Resistance
10kΩ
R58
Resistance
10kΩ
R10
Resistance
33Ω
R39
Resistance
10kΩ
R34
Resistance
1kΩ
R47
Resistance
10kΩ
R67
Resistance
10kΩ
R49
Resistance
10kΩ
R11
Resistance
33Ω
R23
Resistance
33Ω
R17
Resistance
33Ω
R62
Resistance
10kΩ
R32
Resistance
33Ω
R24
Resistance
33Ω
R7
Resistance
10kΩ
R19
Resistance
33Ω
R26
Resistance
33Ω
R12
Resistance
33Ω
R66
Resistance
10kΩ
R54
Resistance
10kΩ
R65
Resistance
10kΩ
R31
Resistance
33Ω
R27
Resistance
33Ω
R52
Resistance
10kΩ
R5
Resistance
10kΩ
R28
Resistance
33Ω
R29
Resistance
33Ω
R8
Resistance
10kΩ
R15
Resistance
33Ω
R4
Resistance
10kΩ
R50
Resistance
10kΩ
R44
Resistance
10kΩ
R30
Resistance
33Ω
R2
Resistance
10kΩ
R51
Resistance
10kΩ
R37
Resistance
10kΩ
R43
Resistance
10kΩ
R18
Resistance
33Ω
R46
Resistance
10kΩ
R60
Resistance
10kΩ
R20
Resistance
33Ω
R6
Resistance
10kΩ
R3
Resistance
10kΩ
R25
Resistance
33Ω
R33
Resistance
1kΩ
R22
Resistance
33Ω
R1
Resistance
10kΩ
R36
Resistance
10kΩ
R48
Resistance
10kΩ
R13
Resistance
33Ω
R14
Resistance
33Ω
R69
Resistance
10kΩ
R42
Resistance
10kΩ
R53
Resistance
10kΩ
R56
Resistance
10kΩ
R68
Resistance
10kΩ
R71
Resistance
10kΩ
R70
Resistance
10kΩ
R64
Resistance
10kΩ
R40
Resistance
10kΩ
R21
Resistance
33Ω
R41
Resistance
10kΩ
R59
Resistance
10kΩ
R9
Resistance
33Ω
R16
Resistance
33Ω
R61
Resistance
10kΩ
R55
Resistance
10kΩ
R45
Resistance
10kΩ
R63
Resistance
10kΩ
D2
C1
Capacitance
0.1 µF
C4
Capacitance
10 µF
R34 P2 - C8 P2
D3
CN1
CN2
R33 P2 - C7 P2
R35 P2 - C9 P2
R33 P2 - C7 P2
CN4
CN5
GND
CN3
C5
Capacitance
10 µF
C7
Capacitance
10nF
GND
C6
Capacitance
10 µF
D4
GND
R34 P2 - C8 P2
R35 P2 - C9 P2
C2
Capacitance
0.1 µF
CN6
C3
Capacitance
0.1 µF
R34 P2 - C8 P2
R35 P2 - C9 P2
C9
Capacitance
10nF
C8
Capacitance
10nF
R33 P2 - C7 P2
U17
U22
U19
TP2
CN7
U16
U18
U24
U21
U23
U20
TP1
U12
U13
F1
U1
U2
D1
U10
U3
U14
U8
U7
U13
U9
FB1
U11
U15

No files yet

Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    Brainstorm w Copilot.png

    Brainstorm w Copilot.png

    Brainstorm w CopilotThumbnail

    Brainstorm a new project with AI [Example]

    Brainstorm a new project with AI [Example] thumbnail
    Compact 4-Layer Raspberry Pi 5 Sensor Hub with Teensy 4.1, 36-Channel FSR Network, SPI Encoders, and Qwiic IMU

    Properties

    Control Bus

    No outstanding ERC/DRC/system review errors; all current @review items are resolved or accepted at this revision.

    Diagram
    


  
    
  
  
    
  



""5V Power Entry""


""3V3 Regulation""


""Host Interfaces""


""SPI Encoder Network""


""Qwiic IMU""


""FSR Network""


""Connector ESD Protection""























































Pi node_5V Header
Polyfuse 1.5-2A
5V TVS Diode
Ideal Diode / Power Path
5V Bulk + Decoupling Caps
5V to node_3V3 Buck Regulator
Ferrite Bead node_3V3A
3V3A Local Decoupling + Test Points
Raspberry Pi Header
Teensy 4.1 Header
6x JST-GH 6-pin SPI Encoders
Series Rs SCK/MOSI/CS/MISO
CS Pullups
ESD Arrays
Qwiic I2C Connector
Optional node_4k7 Pullups via Jumpers
IMU INT/SYNC GPIO
36x FSR Divider Network node_3V3A -> FSR -> Sense -> RREF
CD74HC4067 #1
CD74HC4067 #2
CD74HC4067 #3
Address Lines S0-S3 from Teensy
3x Quad Op-Amp Buffers
RC Filters + BAT54S Clamps to ADC
ESD Arrays at All Offboard Connectors

    Initial ERC run requested – please execute ERC and log all current issues from @review; no schematic or layout edits to be made in this step.

    Power

    Power

    I2C Bus

    USB

    10

    ERC run via @review at this revision; all reported ERC/DRC/system checks are currently resolved or accepted, no outstanding errors remain.

    5

    V

    #PowerManagement, #SensorHub, #Teensy4_1, #SPI, #I2C, #FSR

    ohwr.org/project/cernohl/wikis/home

    Scientific

    SPI Bus

    USB

    Arduino

    Analog

    30000

    hours

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $30.88–$35.62

    Digi-Key

    $23.10–$26.12

    LCSC

    $41.57–$41.58

    Mouser

    $55.46

    TME

    $22.94

    Verical

    $17.37–$27.70

    Controls