Replacing Out-of-Stock Components

Added 2 components and Removed 2 components

0:03

Added 2x EMK105BJ105MV-F as C3, C4

114 days

Updated BOM with new component properties

1:17

Started: Update the BOM to reflect the new part numbers and confirm distributor availability on JLCPCB/LCSC.

Reviewing the bill of materials.

114 days

Updated properties for 4 objects

0:10

Set R1's Part Type to "Fixed Resistor"

Set R1's Manufacturer Name to "UNI-ROYAL"

Set R1's Manufacturer Part Number to "0603WAF5101T5E"

Set R1's Resistor Type to "Chip SMD"

Set R1's Resistance to "5.1k"

Set R1's Tolerance to "1"

Set R1's Power Rating to "0.1"

Set R1's Package or Case Code to "R_0603_1608Metric"

Set R1's Mount to "Surface Mount"

Set R2's Part Type to "Fixed Resistor"

Set R2's Manufacturer Name to "UNI-ROYAL"

Set R2's Manufacturer Part Number to "0603WAF5101T5E"

Set R2's Resistor Type to "Chip SMD"

Set R2's Resistance to "5.1k"

Set R2's Tolerance to "1"

Set R2's Power Rating to "0.1"

Set R2's Package or Case Code to "R_0603_1608Metric"

Set R2's Mount to "Surface Mount"

Set C3's Part Type to "Ceramic Capacitor"

Set C3's Manufacturer Name to "Taiyo Yuden"

Set C3's Manufacturer Part Number to "EMK105BJ105MV-F"

Set C3's Capacitor Type to "Ceramic"

Set C3's Capacitance to "1uF"

Set C3's Voltage Rating to "6.3"

Set C3's Package or Case Code to "C_0402_1005Metric"

Set C3's Mount to "Surface Mount"

Set C4's Part Type to "Ceramic Capacitor"

Set C4's Manufacturer Name to "Taiyo Yuden"

Set C4's Manufacturer Part Number to "EMK105BJ105MV-F"

Set C4's Capacitor Type to "Ceramic"

Set C4's Capacitance to "1uF"

Set C4's Voltage Rating to "6.3"

Set C4's Package or Case Code to "C_0402_1005Metric"

Set C4's Mount to "Surface Mount"

114 days

Worked

0:10

114 days

0:00

Work done
  • Verified existing passives:
    • R1 & R2 are 5.1 kΩ 0603 resistors.
    • C3 & C4 are 1 µF 0402 MLCC decoupling capacitors.
  • Selected JLCPCB/LCSC-friendly parts:
  • Replaced schematic symbols for R1, R2, C3, and C4.
  • Updated BOM to reflect new MPNs and confirmed LCSC stock availability.
Success criteria
  • ✅ Original footprints (0603, 0402) and values (5.1 kΩ, 1 µF) retained.
  • ✅ All substituted parts are in-stock on JLCPCB/LCSC.
  • ✅ BOM updated correctly.
Next step
Review the schematic for completeness and proceed to PCB layout preparation.
114 days

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Project Specification
Version: 0.1.0 Date: ... Author: ... Status: ... Tags: ...

1. Executive Summary
What board we're building and the intended outcome in one paragraph. ...
2. Goals and Non-Goals
What must be true in this rev, and what is explicitly out of scope. ...
2.1 Goals
...
2.2 Non-Goals
...
3. System Overview
High-level description of the system and how the board fits into it. ...
3.1 Block Diagram
A space for a simple block diagram (power + data paths). ...
4. Requirements
What the design must do (behaviorally and electrically), independent of implementation details. ...
4.1 Functional Requirements
...
4.2 Electrical Requirements
Power input, rails, currents, interfaces, sensing accuracy, etc. ...
4.3 Environmental and Reliability Requirements
Operating ranges, expected lifetime, handling constraints, safety/compliance. ...
5. Constraints
Hard limits that shape the design choices. ...
5.1 Mechanical Constraints
Size, mounting, connector access, enclosure interactions. ...
5.2 Power and Thermal Constraints
Power source limits, dissipation ceilings, heat-sensitive components. ...
5.3 Layout / Implementation Constraints
High-level layout rules (keepouts, grounding intent, routing classes), without detailed PCB guidance. ...
5.4 Cost and Sourcing Constraints
Target cost range, availability requirements, preferred vendors/alternates policy. ...
6. Assumptions and Dependencies
What we assume is true, and what the design depends on (parts, standards, external systems). ...
7. Validation Criteria
What “done” means in terms of checks and evidence (not task lists). ...
7.1 Acceptance Tests
...
7.2 Review Checklist
...
Appendix (Optional)
Any supporting urls, analysis, datasets, or taxonomy notes that informed this spec. ...

    1. Executive Summary

    2. Goals and Non-Goals

    2.1 Goals

    2.2 Non-Goals

    3. System Overview

    3.1 Block Diagram

    4. Requirements

    4.1 Functional Requirements

    4.2 Electrical Requirements

    4.3 Environmental and Reliability Requirements

    5. Constraints

    5.1 Mechanical Constraints

    5.2 Power and Thermal Constraints

    5.3 Layout / Implementation Constraints

    5.4 Cost and Sourcing Constraints

    6. Assumptions and Dependencies

    7. Validation Criteria

    7.1 Acceptance Tests

    7.2 Review Checklist

    Appendix (Optional)

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    Project Specification

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