Importing Components for Project

flux

Work done
  • Updated project description with E-stop goals and hashtags (#E_STOP #MOSFET #PH2.0 #SAFETY)
  • Defined system architecture and saved the following Mermaid diagram in the “System Architecture” property:
Diagram



  
    
  
  
    
  



Power









10kΩ Pull-up\n3.3V Rail










"ESP32\n(IO12)"
"PH2.0 Conn1\nE_STOP_IN1"
"PH2.0 Conn2\nE_STOP_IN2"
"MOSFET Gate\n(E_STOP_DRIVE)"
"3.3V Rail"
"36V Bus"
"Contactor Coil"
"MOSFET Drain\n(E_STOP_PATH)"
"MOSFET Source"
"System Ground"
Tasks not yet done
  • Place two series-connected PH2.0 connectors (E_STOP_IN1, E_STOP_IN2)
  • Select and place a logic-level N-channel MOSFET (≥50 V, 60 A)
  • Add 10 kΩ pull-up and gate-to-source resistors
  • Wire ESP32 IO12 through connectors to MOSFET gate and add resistors
  • Insert MOSFET into ground return path and sever the direct ground link
  • Rename nets to E_STOP_CONN1, E_STOP_CONN2, E_STOP_DRIVE, E_STOP_PATH
  • Run ERC to verify there are no floating pins or violations
Success criteria
  • E-stop circuit not yet integrated; criteria are not met.
Next step Move on to the “Key components” phase: pick and add the two PH2.0 connectors and the 50 V/60 A MOSFET to the schematic.

Flux stopped

J1
R21 P2 - R22 P2
U5 GND - CN1 -
U5 GND - CN1 -
U5 GND - CN1 -
U5 GND - CN1 -
U5 GND - CN1 -
R25 P2 - R26 P2
U5 GND - CN1 -
R25 P2 - R26 P2
D2 3 - D3 3
R21 P2 - R22 P2
D2 3 - D3 3
R25 P2 - R26 P2
R21 P2 - R22 P2
U5 GND - CN1 -
R21 P2 - R22 P2
R12
Resistance
290kΩ
R20 P2 - Q8 B
R23
Resistance
10kΩ
R10
Resistance
193.38kΩ
J2 Pin_13 - U2 IO25
R24
Resistance
10kΩ
U3 CANH - J2 Pin_3
U2 IO5 - U4 AP_CS
K1 - - K2 -
R26
Resistance
330Ω
U2 IO22 - U4 AP_SCL/AP_SCLK
J3 Pin_6 - U2 IO21
J3 Pin_2 - U2 IO33
LED2 1 - R26 P1
K1 - - K2 -
U5 SW - L2 P1
U3 CANL - J2 Pin_4
U3 D - U2 IO17
U2 IO0 - R18 P1
K1 - - K2 -
U2 IO14 - R9 P1
J7 CC1 - R21 P1
K1 - - K2 -
R25
Resistance
330Ω
J7 VBUS4 - U6 VBUS
U6 RXD - U2 TXD0
U2 IO15 - R16 P1
R27
Resistance
330Ω
R3
Resistance
120 Ω
D14 K - R27 P1
U3 CANL - J2 Pin_4
U2 IO5 - U4 AP_CS
U5 FB - R12 P2
LED1 K - R25 P1
L2 P2 - R12 P1
R14 P2 - C13 P1
J2 Pin_14 - U2 IO26
J3 Pin_3 - U2 IO27
J7 DA+ - U6 D+
J3 Pin_2 - U2 IO33
R22
Resistance
5.1kΩ
U5 COMP - R14 P1
U3 D - U2 IO17
J7 DA- - U6 D-
U5 COMP - R14 P1
R21
Resistance
5.1kΩ
U2 IO5 - U4 AP_CS
U3 CANH - J2 Pin_3
U6 TXD - U2 RXD0
U2 EN - R20 P1
U6 TXD - U2 RXD0
K1 - - K2 -
R16
Resistance
10kΩ
J7 CC2 - R22 P1
J7 DA+ - U6 D+
R9
Resistance
10kΩ
J7 DA- - U6 D-
U3 R - U2 IO16
L2 P2 - R12 P1
K1 - - K2 -
J7 VBUS4 - U6 VBUS
J3 Pin_1 - U2 IO32
J3 Pin_3 - U2 IO27
J7 CC1 - R21 P1
R4
Resistance
10kΩ
U2 EN - R20 P1
U3 CANL - J2 Pin_4
U4 INT1/INT - U2 IO34
J2 Pin_14 - U2 IO26
LED2 1 - R26 P1
J3 Pin_6 - U2 IO21
U5 VIN - CN1 +
U6 RXD - U2 TXD0
K1 - - K2 -
U2 IO4 - U4 AP_SDO/AP_AD0
R14 P2 - C13 P1
D14 K - R27 P1
R5
Resistance
71.5kΩ
J3 Pin_1 - U2 IO32
L2 P2 - R12 P1
U2 EN - R20 P1
U5 SW - L2 P1
J3 Pin_5 - U2 IO19
R13
Resistance
10kΩ
R7
Resistance
8.06kΩ
J7 DA- - U6 D-
U2 IO0 - R18 P1
U5 VIN - CN1 +
J_COIL P2 - CN1 +
U5 FB - R12 P2
U6 TXD - U2 RXD0
U2 EN - R20 P1
U2 IO4 - U4 AP_SDO/AP_AD0
K1 - - K2 -
R1
Resistance
124kΩ
U2 IO0 - R18 P1
K1 - - K2 -
J3 Pin_5 - U2 IO19
U3 CANH - J2 Pin_3
U2 IO0 - R18 P1
J3 Pin_4 - U2 IO18
U6 RXD - U2 TXD0
U3 CANH - J2 Pin_3
R14
Resistance
200 Ω
U3 CANL - J2 Pin_4
U3 CANL - J2 Pin_4
R11
Resistance
10kΩ
U2 IO22 - U4 AP_SCL/AP_SCLK
R6
Resistance
100kΩ
U5 VIN - CN1 +
LED1 K - R25 P1
R18 P2 - Q6 B
U4 INT1/INT - U2 IO34
K1 - - K2 -
J2 Pin_13 - U2 IO25
U5 FB - R12 P2
L2 P2 - R12 P1
J3 Pin_4 - U2 IO18
U3 CANH - J2 Pin_3
J7 CC2 - R22 P1
R15
Resistance
100 Ω
J_COIL P2 - CN1 +
K1 - - K2 -
R2
Resistance
39.2kΩ
U3 R - U2 IO16
L2 P2 - R12 P1
L2
Inductance
4.7 uH
U1
U4
CN5
D1
C6
Capacitance
100nF
U9
LED2
C11
Capacitance
47 uF
U8
C10
Capacitance
10uF
C12
Capacitance
47 uF
C4
Capacitance
100 nF
CN6
L1
Inductance
Inductance
C9
Capacitance
1uF
C13
Capacitance
4.7nF
C14
Capacitance
47pF
ESP_EN
Resistance
4.7kΩ
Q1
SW2
JP1
C1
C3
Capacitance
22uF
C2
Capacitance
0.1uF
CN1
C8
Capacitance
1pF
CN2
D3
U6
U3
R8
Resistance
1KΩ
CN3
D2
SW1
ESP_IO0
Resistance
4.7kΩ
J3
J2
U12
CN4
U11
J5
D4
J6
U10
U2
C7
Capacitance
470pF
D14
D13
LED1
J4
J7
J_COIL
U7
Q2
U5
TP1
C5

No files yet

Documents

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

    Assets

    No assets added.

    PCB E-dolly

    PCB E-dolly thumbnail
    36 V Contactor Coil Driver with Safe Kill Loop, 3.3 V Logic, SPI IMU, 24 V/5 A Buck, and ESP32 IO12-Driven E-Stop MOSFET via Series PH2.0 Safety Connectors #E_STOP #MOSFET #PH2.0 #SAFETY

    Properties

    36 V contactor coil driver with safe kill input loop interface and 3.3 V logic control.

    Base-emitter pull-down for Q1 ensuring coil off when IC1 output is high-Z or low.

    Low-side NPN transistor (Q1 MMBT5551) with flyback diode (D2 UF4007) across coil between Net 1 (36 V) and Net 14 (Q1 collector).

    Base/gate series resistor limiting drive from IC1 to Q1 (switching control).

    R3 (10k), C4 (100nF) to GND provide RC filtering; R4 (1k) provides series input protection and loop termination from CN3.

    2-pin connector for external safe kill loop input (Safe Raw on pin 1, GND on pin 2).

    Diagram
    


  
    
  
  
    
  



Power









10kΩ Pull-up\n3.3V Rail










"ESP32\n(IO12)"
"PH2.0 Conn1\nE_STOP_IN1"
"PH2.0 Conn2\nE_STOP_IN2"
"MOSFET Gate\n(E_STOP_DRIVE)"
"3.3V Rail"
"36V Bus"
"Contactor Coil"
"MOSFET Drain\n(E_STOP_PATH)"
"MOSFET Source"
"System Ground"

    Net 11

    Automotive

    Transistor

    Steps 36 V down to 3.3 V (Net 7) for logic and control electronics.

    Standard flyback / freewheeling diode D2 from 36 V supply to transistor collector (Net 14) to clamp inductive kick on turn-off.

    Battery

    Schmitt Trigger Inverter

    High-side 36 V supply for contactor coil and buck converter input.

    36

    V

    3.3 V logic rail powering ESP32 and SN74LVC1G14 Schmitt inverter.

    Integrated Circuit

    Diode

    Safe kill input loop sensed via R3/R4 and filtered by C4 into Schmitt-trigger IC1.

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $13.20–$17.92

    Digi-Key

    $14.27–$24.75

    LCSC

    $17.43–$18.53

    Mouser

    $30.31

    TME

    $15.72

    Verical

    $14.03–$35.93

    Controls