Stepper Driver PCB Design
0:00
Work done
- Updated project description to a clear summary of the board’s goals and hashtags
- Updated System Architecture property with the provided Mermaid diagram
- Added major ICs:
- Added connectors:
Remaining tasks
- Add and configure supporting passive/auxiliary components:
- 16V, 100 µF bulk electrolytic capacitors
- Low-ESR ceramic decoupling capacitors
- 16 MHz crystal with load capacitors
- 2×3 ISP programming header
- 4-pin motor and logic connectors
- Bidirectional TVS diodes for USB D+/D–
- CC Rd resistors for USB-C configuration
- Sense resistor and VREF test point for A4988 current limit
- Wire the power subsystem (jack → VMOT, jack → buck VIN, buck 5 V → MCU/CH340) and place decoupling nets
- Complete USB, UART, ISP, and A4988 configuration nets
Success criteria review
- ✅ All major ICs and connectors are present
- ❌ 16 MHz crystal and decoupling components not yet added
- ❌ A4988 full-step configuration and sense resistor/VREF point missing
- ❌ Power decoupling network incomplete
- ❌ Net wiring for USB, power, and motor control not yet done
Recommended next step
Proceed with adding and configuring all supporting passive and auxiliary components (step 5 of the plan) to meet decoupling, crystal, header, TVS, CC resistor, and sense resistor requirements.
95 days
1:19
Chat History
Project
Planning step options.
Applying PLAN rules.
Outlining plan steps.
Managing component linking.
Goal restated: complete the design by adding passives, connectors, and nets; wire power/USB/UART; configure full‑step and 1.0 A current limit; then verify.
Planned next steps:
- Add passives and clock, program/debug headers, motor I/O.
- Wire 12V/5V rails with local decoupling.
- Wire USB‑C↔U3 and [U3]↔U2.
- Configure U1 full‑step and current‑limit with VREF TP; add ISP.
Questions:
- Motor connector style: screw terminal or JST‑XH?
- Permanently tie full‑step, or leave jumpers?
- Add USB ESD protection? Click Start to run.
Connector and jumpers choice
Ask for USB ESD and CC details
Clarify current-limit network
Choose ISP/UART header style
Decoupling and bulk caps detail
95 days
Ready to start.
Show Plan
U2
Not Recommended for New Designs
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
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- 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 10,000uF 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 20pF 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 #CommonPartsLibraryjharwinbarrozo1.5M
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- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
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