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Hardware Electronic Component Quick Reference Assistant

Development Updated 2026.08.30

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About this skill

Problem

During hardware debugging and component selection, engineers often face markings such as A7B, 103, or 104, need manual conversions for resistance, capacitance, and inductance, and must verify package sizes or basic circuit values. These tasks are fragmented and prone to mistakes caused by units, default assumptions, or resistor color code order.

How It Works

The skill provides command-based lookup and calculation support for electronic components:
- Marking lookup: use mark to identify a component model from its surface marking.
- Parameter conversion: use res-code, cap-code, and ind-code to convert numeric codes into resistance, capacitance, or inductance; use res-color4 for 4-band resistor color codes.
- Series and parallel calculations: use res-series, res-parallel, cap-series, and cap-parallel to calculate combined values from provided inputs.
- Circuit calculations: use led for current-limiting resistance, div for voltage divider output, rc for cutoff frequency, and pcb for trace current based on width, copper thickness, and temperature rise.
- Package lookup: use package to query SMD package dimensions, such as 0805.
- Model search: use search for keyword-based online searches of chips, components, or related documents.

Boundaries

It is useful for quick parameter checks, basic conversions, and preliminary component screening. It should not replace official datasheets, simulation, or formal design review. Inputs should specify units as clearly as possible, such as , μF, mm, or oz; for temperature drift, ESR, parasitics, or high-reliability use cases, follow the vendor datasheet and applicable engineering standards.

Use Cases

  • When debugging an LED module, calculate the current-limiting resistor from supply voltage and forward voltage.
  • When seeing 103 or 104 markings on a board, decode resistance or capacitance and cross-check a BOM.
  • When designing an RC filter, calculate the cutoff frequency from a given resistor and capacitor value.
  • Before routing a PCB, estimate current capacity for a 0.5mm trace with default copper thickness and temperature rise.

Best For

  • Hardware engineers: need quick marking lookup, RLC value conversion, and package size checks.
  • Embedded developers: need basic parameter calculations for LED, voltage divider, or RC circuits.
  • PCB design assistants: need trace current estimation based on width, copper thickness, and temperature rise.
  • Electronics repair technicians: need model lookup from markings or color codes and equivalent value calculations.