Trace width calculator usage in PCB Design - Real Business Scenario

Scenario Mode

👤 Your Role: You are a PCB design engineer working on a new circuit board.

📋 Request: Your manager wants you to calculate the correct trace widths for different current loads to ensure safe and efficient PCB operation.

📊 Data: You have a table of current values (in Amperes) and the corresponding trace width recommendations (in mils) based on IPC-2152 standards for 1 oz copper thickness.

🎯 Deliverable: Create a report showing the trace width needed for each current value and visualize the relationship between current and trace width.

Sample Data

Current (A)	Trace Width (mils)
0.5	10
1	15
2	25
3	35
4	45
5	55
6	65
7	75
8	85
9	95
10	105

1

Step 1: Import the sample data into your BI tool as a table with columns 'Current (A)' and 'Trace Width (mils)'.

Load data from the provided table into your data model.

Expected Result

Data table with 11 rows showing current and trace width values.

2

Step 2: Create a calculated measure to convert trace width from mils to millimeters for easier understanding.

Trace Width (mm) = [Trace Width (mils)] * 0.0254

Expected Result

New measure 'Trace Width (mm)' showing trace width in millimeters.

3

Step 3: Build a line chart with 'Current (A)' on the X-axis and 'Trace Width (mm)' on the Y-axis to visualize the relationship.

Chart configuration: X-axis = Current (A), Y-axis = Trace Width (mm), Chart type = Line chart

Expected Result

Line chart showing increasing trace width as current increases.

4

Step 4: Add data labels to the line chart to display exact trace width values at each current point.

Enable data labels on the line chart for 'Trace Width (mm)'.

Expected Result

Line chart with visible trace width values at each current point.

5

Step 5: Create a summary table showing 'Current (A)', 'Trace Width (mils)', and 'Trace Width (mm)' side by side for easy reference.

Table visual with columns: Current (A), Trace Width (mils), Trace Width (mm)

Expected Result

Table displaying all three columns for all current values.

Final Result

Trace Width Calculator Report

Current (A) | Trace Width (mils) | Trace Width (mm)
---------------------------------------------------
0.5         | 10                 | 0.254
1           | 15                 | 0.381
2           | 25                 | 0.635
3           | 35                 | 0.889
4           | 45                 | 1.143
5           | 55                 | 1.397
6           | 65                 | 1.651
7           | 75                 | 1.905
8           | 85                 | 2.159
9           | 95                 | 2.413
10          | 105                | 2.667

(Line chart shows a smooth upward curve from 0.5A to 10A with trace width increasing accordingly)

✓Trace width increases as current increases to safely carry the electrical load.

✓Converting mils to millimeters helps in international design standards.

✓The relationship between current and trace width is nearly linear in this range.

✓Using this report, PCB designers can select appropriate trace widths to avoid overheating.

Bonus Challenge

Add a filter to the report to select different copper thicknesses (e.g., 1 oz, 2 oz) and update trace width calculations accordingly.

Show Hint

Use a parameter or slicer for copper thickness and apply a multiplier to the trace width values based on IPC-2152 guidelines.