PCB Design Unterstützung
1:32
Clarifying plan requirements.
Using knowledge tool efficiently.
Planning knowledge integration.
Crafting the plan summary.
Using Knowledge Base Tool.
Finalizing the detailed plan.
- Power refactor
- Swap LDO to ≥500 mA and add required caps; create 3V3.
- Add 1S charger + protection; create BATT_PROT; feed Boost IN.
- 12 V path
- BOOST_12V_RAW → shunt → INA219 → P‑MOSFET → PS5_12V; add TVS and optional series R.
- USB‑UART
- J1 D± → ESD → R9/R10 → CP2102N; keep TX/RX direct; gate EN/IO0 via jumpers.
- Interfaces
- Map I2C (GPIO21/22), UART2 (GPIO16/17 with 100 Ω), DS18B20 (GPIO4).
- Cleanup
- Normalize net names; remove stale portals; run ERC.
Started implementing a plan
#Goal
- Refactor the PS5‑Diagnose‑Power‑Supply‑Stick schematic to meet the new target architecture by replacing the 3.3 V LDO with a ≥500 mA component, adding a 1S Li‑ion charger and protection block, rewiring power nets to integrate a charger, Boost converter, shunt measurement, and MOSFET-based power path; ensure proper USB-UART enumeration through the CP2102N and map additional headers (UART2, OLED I2C, DS18B20) while cleaning up net names and running ERC.
#Implementation plan
1. Power Subsystem
1. Replace the existing 3.3 V LDO with a new ≥500 mA version. Add the necessary capacitors at input and output and rename the resulting supply net to ‘3V3’.
2. Add a 1S Li‑ion charger circuit (TP4056‑class) using the USB_5V supply and incorporate a 1S protection block (DW01A+FS8205‑class). Wire the output of the protection circuit to create a new net BATT_PROT.
3. Connect BATT_PROT as the input for the external Boost converter via the net labeled Boost IN.
2. 12 V Power Path
1. Rewire the BOOST_12V_RAW path to incorporate the series shunt resistor (R8), feed the voltage into the INA219 (U1) for current/voltage monitoring, and then route through the P‑MOSFET (Q1) to provide the PS5_12V supply.
2. Add a TVS diode (D1) to protect the 12 V path and include an optional resistor (R14) for additional filtering or voltage control as required.
3. USB‑UART and CP2102N Enumeration
1. Route the USB D+/D‑ lines from the USB-C connector (J1) through the USBLC6‑4SC6 ESD protection (U11) and appropriate resistors (R9/R10) into the CP2102N (U10).
2. Ensure that the CP2102N always enumerates by confirming correct connections and adding jumper‑gated routing (via JP1/JP2) to the EN/IO0 line for auto‑programming.
4. Interface Mapping and Net Cleanup
1. Map the additional headers for UART2, the OLED I2C (using GPIO21 for SDA and GPIO22 for SCL with 4.7k pull‑ups), and the DS18B20 sensor (using GPIO4 for 1WIRE).
2. Rename and clean up all net names (e.g., '3V3', 'POWER_CTRL', 'PS5_12V', 'BATT_PROT+', 'I2C_SDA/SCL', '1WIRE', 'UART*') and remove unused portals.
3. Run ERC to validate the schematic’s compliance with electrical rules.
#Success criteria
- The schematic uses a ≥500 mA 3.3 V LDO, a fully integrated 1S Li‑ion charger and protection block, and meets the new power net routing requirements.
- The 12 V path is routed through the shunt, INA219, and P‑MOSFET to PS5_12V with additional TVS protection.
- CP2102N enumerates reliably with jumper‑gated auto‑program (EN/IO0).
- All headers (UART2, OLED I2C, DS18B20) are correctly mapped and the schematic shows clean, standardized net naming.
- ERC runs without significant errors or warnings, confirming schematic compliance.
Working on your request...
0:25
Using Schematic Tool.
Using Knowledge Base Tool...
Identified candidate LDO, charger, protection, TVS
1:04
Started: Selecting LDO, charger, protection, TVS parts
Searching for components.
Searching.
Searching.
Creating search plan for: "TVS diode SMAJ 12V"
Searching.
Searching.
Searching: "LDO 3.3V 500mA"
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Searching.
Searching: "TVS diode SMAJ 12V"
Finished searching for components.
Execution stopped due to insufficient credits.
1:47
Started: Replacing LDO, adding charger and protection
Using Review (ERC/DRC) Tool.
Added 14 components and Removed 1 component
0:09
Added 1x LP38693MP-3.3/NOPB as U15
Added 1x TP4056 as U16
Added 1x DW01A as U17
Added 1x FS8205A as Q2
Added 1x SMAJ12A-TR as D1
Added 5x Generic Capacitor as C11, C12, C13, C14, C15
Added 4x Generic Resistor as R14, R15, R16, R17
Ready to start.
Show Plan
Reviews
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- 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
- A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibraryjharwinbarrozo1.5M
- 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
- A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #genericsjharwinbarrozo15.4k
- 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
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
Inspect
Historical Indigo Ecto Goggles 16e1 dcf9
Controls
Properties
Availability & Pricing
| Distributor | Qty 1 | |
|---|---|---|
| Arrow | $7.17–$157.55 | |
| Digi-Key | $11.87–$132.64 | |
| LCSC | $4.50–$44.34 | |
| Mouser | $14.90–$47.96 | |
| TME | $2.43 | |
| Verical | $5.72–$72.06 | |
Assets
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