Importing Components for Project

Thought

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

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

R21 P2 - R22 P2

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

R23

Resistance

10kΩ

R10

Resistance

193.38kΩ

R24

Resistance

10kΩ

R26

Resistance

330Ω

R25

Resistance

330Ω

R27

Resistance

330Ω

Resistance

120 Ω

R22

Resistance

5.1kΩ

R21

Resistance

5.1kΩ

R16

Resistance

10kΩ

Resistance

10kΩ

Resistance

10kΩ

Resistance

71.5kΩ

R13

Resistance

10kΩ

Resistance

8.06kΩ

Resistance

124kΩ

R14

Resistance

200 Ω

R11

Resistance

10kΩ

Resistance

100kΩ

R15

Resistance

100 Ω

Resistance

39.2kΩ

R20 P2 - Q8 B

J2 Pin_13 - U2 IO25

U3 CANH - J2 Pin_3

U2 IO5 - U4 AP_CS

K1 - - K2 -

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 -

J7 VBUS4 - U6 VBUS

U6 RXD - U2 TXD0

U2 IO15 - R16 P1

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

U5 COMP - R14 P1

U3 D - U2 IO17

J7 DA- - U6 D-

U5 COMP - R14 P1

U2 IO5 - U4 AP_CS

U3 CANH - J2 Pin_3

U6 TXD - U2 RXD0

U2 EN - R20 P1

U6 TXD - U2 RXD0

K1 - - K2 -

J7 CC2 - R22 P1

J7 DA+ - U6 D+

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

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

J3 Pin_1 - U2 IO32

L2 P2 - R12 P1

U2 EN - R20 P1

U5 SW - L2 P1

J3 Pin_5 - U2 IO19

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 -

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

U3 CANL - J2 Pin_4

U2 IO22 - U4 AP_SCL/AP_SCLK

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

J_COIL P2 - CN1 +

K1 - - K2 -

U3 R - U2 IO16

L2 P2 - R12 P1

Inductance

4.7 uH

Inductance

CN5

Capacitance

100nF

LED2

C11

Capacitance

47 uF

C10

Capacitance

10uF

C12

Capacitance

47 uF

Capacitance

100 nF

CN6

Capacitance

1uF

C13

Capacitance

4.7nF

C14

Capacitance

47pF

ESP_EN

Resistance

4.7kΩ

SW2

JP1

Capacitance

22uF

Capacitance

0.1uF

CN1

Capacitance

1pF

CN2

SW1

ESP_IO0

Resistance

4.7kΩ

Resistance

1KΩ

CN3

CN4

U12

U10

U11

Capacitance

470pF

D14

D13

LED1

J_COIL

TP1

Reviews

Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
16.6k
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, 10000uF 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, 220pF, 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 Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
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
RMCF0805JT47K0
General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
jharwinbarrozo
1.2M
875105359001
10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
jharwinbarrozo
1.1M
1070TR
Battery Holder (Open) Coin, 20.0mm 1 Cell SMD (SMT) Tab bate or batt #forLedBlink
jharwinbarrozo
700.5k
Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius

Project Name

PCB E-dolly

Description

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

Layout Rules

Dimension Unit

Enabled

Yes

Grid Spacing

10mm

Layer

Top

Rotation Unit

deg

Properties

Project Description

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

R9 Role

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

Contacto…opology

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

R8 Role

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

SAFE_IN …ponents

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

CN3 Role

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

System Architecture

Diagram

SAFE_IN Net Name

Net 11

Domain

Automotive

Q1 Part Type

Transistor

Buck Co…MP2565)

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

Coil Flyb… Strategy

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

Power R…rements

Battery

Logic Fu…on (IC1)

Schmitt Trigger Inverter

Net 1 Role

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

Operating Voltage

Net 7 Role

3.3 V logic rail powering ESP32 and SN74LVC1G14 Schmitt inverter.

IC1 Part Type

Integrated Circuit

D2 Part Type

Diode

SAFE_IN Role

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

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