PCB Design Step-by-Step Guide

create a new document Build GLECS V4 Motor Controller PCB. Follow these steps in exact order, complete each step fully before moving to next: STEP 1 — BOARD OUTLINE ONLY: Create board outline 150x100mm. Add 4 mounting holes 3.2mm NPTH at corners (5,5) (145,5) (5,95) (145,95). Nothing else yet. STEP 2 — ISOLATION SLOT ONLY: Draw isolation slot on Edge.Cuts at X=60mm, width 1.5mm, from Y=5mm to Y=95mm. Add keepout rule — absolutely no copper, no traces, no vias within 0.5mm of slot on either side. Confirm slot exists before continuing. This slot divides board into LEFT switching zone (X=0 to X=59mm) and RIGHT logic zone (X=61mm to X=150mm). STEP 3 — PLACE SWITCHING ZONE COMPONENTS (LEFT SIDE ONLY X=2 to X=58): Place these components only in left zone:

J2 screw terminal 3P 5mm LCSC C557652 at X=8 Y=78 (12V power input)
J3 screw terminal 3P 5mm LCSC C557652 at X=8 Y=22 (motor output)
F1 fuse 500mA 1812 LCSC C12559 at X=25 Y=10
D1 SM6T12A TVS LCSC C133698 at X=38 Y=10
K1 SRD-12VDC relay LCSC C30431 at X=28 Y=65
D2 1N4007 diode LCSC C727111 at X=28 Y=48
U5 ULN2003ADR SOIC-16 LCSC C164883 at X=42 Y=55
U4 PC817C DIP-4 LCSC C115500 at X=54 Y=55
R10 330R 0603 LCSC C98220 at X=56 Y=48 Do not place anything in right zone yet. STEP 4 — PLACE LOGIC ZONE COMPONENTS (RIGHT SIDE ONLY X=62 to X=148): Place these components only in right zone:
J1 DC barrel jack LCSC C111567 at X=68 Y=92
U1 AMS1117-5V SOT-223 LCSC C6187 at X=82 Y=78
C1 1000uF radial LCSC C503217 at X=93 Y=78
U9 LMR33630 SOIC-8EP LCSC C1355643 at X=110 Y=90
L1 2.2uH inductor SRN6028 LCSC C167118 at X=125 Y=90
U2 STM32 Blue Pill module at X=105 Y=55
U3 A7672S 4G module at X=130 Y=70
J4 SMA edge connector LCSC C1509229 at X=148 Y=72
U6 DS18B20 TO-92 LCSC C376006 at X=130 Y=34
U7 DHT22 module at X=120 Y=20
U8 ACS724 SOIC-8 LCSC C52034468 at X=100 Y=20
SW1 tactile switch LCSC C406160 at X=72 Y=44
J5 4-pin header LCSC C91552 at X=138 Y=45
J6 6-pin SWD header LCSC C2685206 at X=72 Y=55
Star GND copper pad 4x4mm at X=88 Y=48
Place all decoupling caps 100nF 0603 within 2mm of each IC power pin
Place bulk caps 22uF 0805 near U1 and U9 outputs
R1 1k, R2-R3 4.7k, R4-R5 10k, R6 100k, R7-R8 33k all 0603 near STM32 STEP 5 — ROUTE SWITCHING ZONE ONLY: Route only left zone traces. Stay strictly within X=2 to X=58mm:
12V power rail 1mm trace: J2 pin1 → F1 → D1 → K1 coil pin2
GND_SW rail 0.5mm: J2 pin3 → K1 coil pin1 → U5 GND → D2 cathode
Relay control 0.5mm: U5 output → K1 coil
Relay output 1mm: K1 NO contact → J3
D2 flyback across K1 coil pins Do not route any trace that crosses X=60mm yet. STEP 6 — ROUTE LOGIC ZONE ONLY: Route only right zone traces. Stay strictly within X=62 to X=148mm:
12V rail 1mm: J1 → F1 area → U1 input → U9 input
5V rail 0.8mm: U1 output → C1 → STM32 VIN
Buck rail 0.8mm: U9 output → L1 → U3 power
GND 0.5mm: all logic GND to star ground pad at X=88 Y=48
UART 0.25mm: STM32 PA9 PA10 → U3 RX TX
Sensor 0.25mm: STM32 PA2 → U6, PA3 → U7, PA0 → U8
I2C 0.25mm: STM32 PB6 PB7 → J5
SWD 0.25mm: STM32 PA13 PA14 → J6
RF 1mm 50ohm: U3 antenna → J4 SMA Do not route any trace that crosses X=60mm yet. STEP 7 — ROUTE ISOLATION CROSSING LAST: Only one signal crosses the isolation slot — route it now:
STM32 PA1 → R10 330R → U4 PC817 LED anode (logic side)
U4 PC817 collector → U5 ULN2003 input (switching side) These traces enter and exit through the PC817 pins which are the ONLY legal crossing point. STEP 8 — COPPER POURS:
Bottom layer left zone: solid GND_SW copper pour
Bottom layer right zone: solid GND copper pour
No copper under A7672S antenna area STEP 9 — DRC AND FIX: Run full DRC. Fix every single error. Verify isolation slot has 0.5mm clearance. Target 0 errors. STEP 10 — EXPORT: Export Gerber ZIP for JLCPCB. Export BOM CSV with Comment Designator Footprint LCSC-Part-Number Qty columns. Export CPL CSV with Designator Mid-X Mid-Y Layer Rotation columns — coordinates as plain numbers no mm units

Thought for 3 sec

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I’ll create the PCB build document, then apply the board outline, slot/keepout, placement, routing, DRC fixes, and manufacturing exports in the exact order you specified, validating each phase before moving on.

Worked for 1 min 3 sec

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Create outline first

Verify footprints first

Save project constraints

Find missing alternatives

GND

J1 VBUS - J1 VBUS

GND

J1 VBUS - U10 VBUS

J1 DN1 - J1 DN2

J1 VBUS - J1 VBUS

J1 DP1 - J1 DP2

GND

J1 CC1 - U10 CC1

J1 DN1 - J1 DN2

J1 CC2 - U10 CC2

GND

J1 DP1 - J1 DP2

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
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Generic Resistor
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An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
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CTL1206FYW1T
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jharwinbarrozo
700.5k

Project Name

Description

Industrial 415V 3-phase motor control interface with STM32 command logic, SIMCom A7672S 4G SMS control, isolated relay driver, 12V input power, and 150x100mm 2-layer PCB constraints.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$1.85–$2.42
Digi-Key	$6.60
HQonline	$1.32–$1.78
LCSC	$6.16–$6.43
Mouser	$4.64
TME	$4.94
Verical	$0.33–$0.57

Controls

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