Symbol vs footprint concept in PCB Design - Dashboard Approaches Compared

Dashboard Mode - Symbol vs footprint concept

Business Question

How can we clearly understand the difference and relationship between a PCB symbol and its footprint to improve PCB design accuracy?

Sample Data: Components and Their Symbols and Footprints

Component	Symbol Description	Footprint Description	Pin Count	Package Type
Resistor R1	Two terminals, resistor symbol	Rectangular pad layout, 2 pads, 0603 size	2	0603 SMD
Capacitor C1	Two terminals, capacitor symbol	Rectangular pad layout, 2 pads, 0805 size	2	0805 SMD
Microcontroller U1	Multiple pins, IC symbol with pin numbers	QFP package, 44 pads arranged in 4 sides	44	QFP-44
LED D1	Diode symbol with arrow	Two pads, 1206 size	2	1206 SMD
Connector J1	Multiple pins, connector symbol	Through-hole pads, 10 pins in single row	10	Header 10-pin

Dashboard Components

• KPI Card: Total Components - COUNTROWS(Components) = 5
• KPI Card: Average Pin Count - AVERAGE(Components[Pin Count]) = 12
• Bar Chart: Pin Count by Component
  Shows each component's pin count visually.
• Table: Components with Symbol and Footprint Descriptions
  Displays component name, symbol description, footprint description side by side.
• Pie Chart: Package Type Distribution
  Shows percentage of components by package type (SMD vs Through-hole).

Dashboard Layout

+----------------------+----------------------+
| Total Components (KPI) | Average Pin Count (KPI) |
+----------------------+----------------------+
|                      Bar Chart: Pin Count by Component                      |
+--------------------------------------------------------------------------+
| Table: Components with Symbol and Footprint Descriptions                  |
+--------------------------------------------------------------------------+
| Pie Chart: Package Type Distribution                                      |
+--------------------------------------------------------------------------+

Interactivity

Filter by Package Type (SMD or Through-hole) updates all components:

• KPI cards recalculate totals and averages for filtered components.
• Bar chart updates to show pin counts only for filtered components.
• Table shows only components matching the selected package type.
• Pie chart updates to reflect distribution within the filtered set.

Self Check

If you add a filter for Package Type = 'SMD', which components remain visible?

Answer: Resistor R1, Capacitor C1, Microcontroller U1, LED D1 remain visible. Connector J1 is filtered out.

Key Result

Dashboard explains the difference between PCB symbols and footprints by showing component details, pin counts, and package types.