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Baseado na classificação ocupacional SOC
Explorador de arquivos
8 arquivos name eda-research description Component research and procurement. Search JLC for components, analyze datasheets, compare options, and document selections with rationale. allowed-tools Read, Write, WebFetch, WebSearch, Glob, mcp__jlc__*
EDA Research Skill
Source and select components for electronics projects.
Auto-Activation Triggers
This skill activates when:
User asks to "find a component", "search for", "source"
User asks about component specifications or comparisons
User mentions LCSC, datasheets, or part numbers
User asks "what MCU/regulator/sensor should I use"
Project has design-constraints.json but missing component selections
Context Requirements
Requires:
docs/design-constraints.json (or prompt user for requirements)docs/project-spec.md (optional, for context)
Produces:
docs/component-selections.md - Human-readable selection logdocs/bom-draft.json - Machine-readable BOMdatasheets/*.pdf - Downloaded datasheets for selected components
Workflow
1. Load Context
Read existing project constraints:
@docs/design-constraints.json
@docs/project-spec.md
@docs/component-selections.md (if exists)
If constraints missing, ask user for minimum requirements:
What does this component need to do?
Key specifications (voltage, current, package)?
Budget constraints?
2. Understand Requirements For the target component role, identify:
Critical specifications (must-have)
Preferred specifications (nice-to-have)
Package preferences (SMD size, through-hole)
Any specific brands or series to consider/avoid
2.5 Check Architecture Constraints Before searching, review design-constraints.json for:
Power topology: LDO vs buck decision already made in architect phaseThermal budget: Max watts for this role (check thermal.hotComponents)DFM targets: Assembly method affects package choiceBoard layers: May affect component density For power components, see reference/REGULATOR-SELECTION.md for selection criteria.
For passives, see reference/PASSIVE-SELECTION.md and reference/DECOUPLING-STRATEGY.md.
3. Research Options Use web search to understand:
Common solutions for this application
Recommended parts from reference designs
Known issues or considerations
Alternative approaches
4. Search JLC Use mcp__jlc__component_search to find candidates:
Search with specific parameters
Filter by stock availability
Note pricing at target quantity
Check for "Basic" parts (lower assembly fee at JLCPCB)
5. Analyze Candidates
Download/fetch datasheets
Extract key specifications
Check application circuits
Note layout requirements
Identify any gotchas
5.5 Validate Against Constraints Before presenting options, verify each candidate:
P_dissipation = (calculated from datasheet)
Thermal budget = (from design-constraints.json)
✓ P_dissipation < Thermal budget
Hand assembly → 0603/0805 minimum, no fine-pitch
Reflow → 0402+ OK
Turnkey → Check JLCPCB availability
Meets LDO/buck decision from architect phase
Noise specs OK for rail type (analog vs digital)
Efficiency acceptable for battery applications
Flag any candidates that fail validation with specific concerns.
6. Present Comparison Create a comparison table:
Part MPN Key Specs Price Stock Pros Cons ... ... ... ... ... ... ...
Include recommendation with rationale.
7. Confirm Selection
Get user confirmation
Document selection with rationale
Update constraint file
Save datasheet
8. Validate Symbol (After library_fetch) When fetching online components with mcp__jlc__library_fetch, analyze the returned validation_data :
Check Expected Action if Failed pin_pad_count_matchtrueCheck for exposed pads (EP) has_power_pinstrue (for ICs)Review pin types has_ground_pinstrue (for ICs)Review pin names
QFN/BGA packages often have exposed thermal pads (EP) not included in symbolPin electrical types may be incorrect (power pins marked as passive)Pin names may not match datasheet Use mcp__jlc__library_fix to regenerate symbol with corrections:
mcp__jlc__library_fix lcsc_id="C#####" corrections='{
"pins": [
{ "action": "add", "number": "EP", "name": "GND", "type": "passive" },
{ "action": "modify", "number": "1", "set_type": "power_in" }
]
}'
add - Add missing pin (number, name, type required)modify - Rename and/or change electrical typeswap - Swap positions of two pinsremove - Remove incorrect pin
Output Format
component-selections.md Entry ### [Role]: [Part Name] ([LCSC Number])
**Selected:** [Date]
**MPN:** [Manufacturer Part Number]
**Manufacturer:** [Name]
**Price:** $X.XX @ [quantity]
**Specifications:**
- Key spec 1: value
- Key spec 2: value
**Rationale:**
[Why this part was chosen over alternatives]
**Alternatives Considered:**
- [Part 2] - rejected because [reason]
- [Part 3] - rejected because [reason]
**Design Notes:**
- [Any layout or application notes from datasheet]
**Datasheet:** `datasheets/[filename].pdf`
bom-draft.json Entry {
"role" : "regulator-3v3" ,
"lcsc" : "C6186" ,
"mpn" : "AMS1117-3.3" ,
"manufacturer" : "AMS" ,
"description" : "3.3V 1A LDO Regulator" ,
"value" : "3.3V" ,
"footprint" : "SOT-223" ,
"quantity" : 1 ,
"unitPrice" : 0.04 ,
"extendedPrice" : 0.04 ,
"category" : "power" ,
"basic" : true }
Component Role Categories See reference/COMPONENT-CATEGORIES.md for detailed role definitions.
mcu - Main microcontrollerregulator-Xv - Voltage regulatorscrystal - Oscillators/crystalsconnector-* - Various connectorsesd-* - ESD protectiondecoupling-* - Bypass/bulk capacitorsled-* - Indicator LEDssensor-* - Various sensors
Guidelines
Prefer JLCPCB "Basic" parts when suitable (lower assembly cost)
Check stock levels - avoid parts with < 100 in stock
Consider package size vs hand soldering capability
Note lead times for non-stock items
Always document why a part was chosen
Download datasheets for all selected components
Identify 1-2 alternatives for critical components (see reference/COMPONENT-ALTERNATIVES.md)Validate thermal before confirming power componentsCheck architecture decisions from design-constraints.json before selecting
Reference Documents Document Use For REGULATOR-SELECTION.mdLDO vs Buck selection criteria DECOUPLING-STRATEGY.mdCapacitor values for ICs PASSIVE-SELECTION.mdResistor/capacitor fundamentals COMPONENT-ALTERNATIVES.mdFinding equivalent parts DATASHEET-ANALYSIS.mdExtracting key specs COMPONENT-CATEGORIES.mdRole naming conventions JLC-SEARCH-TIPS.mdSearch strategies
Next Steps After component selection is complete:
Run /eda-source for remaining components
When all components selected, run /eda-schematic
Update design-constraints.json stage to "schematic"
