Wiring connections between components in PCB Design - Real Business Scenario

Scenario Mode

👤 Your Role: You are a PCB design analyst at an electronics manufacturing company.

📋 Request: Your manager wants a report showing the wiring connections between components on a new circuit board design to ensure all connections are correctly mapped and optimized.

📊 Data: You have a dataset listing components, their pins, and the nets (wires) connecting these pins. Each row shows a component, pin number, and the net it connects to.

🎯 Deliverable: Create a dashboard that visualizes the wiring connections between components, showing which components connect through which nets, and a summary of the number of connections per component.

Sample Data

Component	Pin	Net
U1	1	NET_A
U1	2	NET_B
R1	1	NET_A
R1	2	NET_C
C1	1	NET_B
C1	2	NET_D
U2	1	NET_C
U2	2	NET_D
R2	1	NET_E
R2	2	NET_F

1

Step 1: Load the dataset into your BI tool with columns: Component, Pin, Net.

Import the data as a table named 'WiringData'.

Expected Result

Data table 'WiringData' with 10 rows loaded.

2

Step 2: Create a calculated measure to count the number of connections per component.

ConnectionsCount = COUNTROWS(FILTER(WiringData, WiringData[Component] = SELECTEDVALUE(WiringData[Component])))

Expected Result

Measure 'ConnectionsCount' shows correct counts, e.g., U1 has 2 connections.

3

Step 3: Build a matrix visualization with Rows = Component, Columns = Net, Values = Count of Pins connected.

Configure matrix: Rows = WiringData[Component], Columns = WiringData[Net], Values = COUNT(WiringData[Pin])

Expected Result

Matrix shows which components connect to which nets with counts.

4

Step 4: Create a network diagram visualization to show wiring connections between components via nets.

Use a custom visual or tool that maps Components as nodes and Nets as edges connecting them.

Expected Result

Network diagram displays components connected by nets, visually showing wiring.

5

Step 5: Add filters to allow selecting a specific component or net to focus on its connections.

Add slicers for Component and Net fields.

Expected Result

User can filter dashboard to see wiring connections for selected components or nets.

Final Result

Network Diagram Visual

↓

Component

✓U1 and R1 share NET_A, indicating a direct wiring connection.

✓C1 and U2 are connected through NET_D and NET_B, showing multiple wiring paths.

✓R2 is isolated with connections only on NET_E and NET_F, no shared nets with other components.

✓The dashboard allows quick identification of wiring paths and potential design issues.

Bonus Challenge

Create a measure that identifies nets connecting more than two components and highlight them in the network diagram.

Show Hint

Use a DAX formula to count distinct components per net, then filter nets with count > 2.

Practice

1.

What is the main purpose of wiring connections between components on a PCB?

easy

A. To increase the size of the PCB

B. To decorate the PCB with colorful lines

C. To allow electrical signals to flow between components

D. To make the PCB waterproof

Solution

1. Step 1: Understand the role of wiring on a PCB

   Wiring connects different parts so electricity can flow and components can communicate.

2. Step 2: Eliminate unrelated options

   Decorations, size increase, and waterproofing are not functions of wiring connections.

3. Final Answer:

   To allow electrical signals to flow between components -> Option C

4. Quick Check:

   Wiring = electrical connection [OK]

Hint: Wiring connects parts for electricity flow [OK]

Common Mistakes:

• Thinking wiring is for decoration
• Confusing wiring with PCB size or shape
• Assuming wiring makes PCB waterproof

2.

Which of the following is the correct way to represent a wiring connection between two pins in a PCB schematic?

A) Pin1 --- Pin2
B) Pin1 = Pin2
C) Pin1 > Pin2
D) Pin1 + Pin2

easy

A. Pin1 = Pin2

B. Pin1 --- Pin2

C. Pin1 > Pin2

D. Pin1 + Pin2

Solution

1. Step 1: Identify standard wiring notation in schematics

   Wiring is usually shown as a line or dashes connecting pins, like '---'.

2. Step 2: Check other options for correctness

   '=' is not used for wiring, '>' and '+' are not standard wiring symbols.

3. Final Answer:

   Pin1 --- Pin2 -> Option B

4. Quick Check:

   Wiring line = --- [OK]

Hint: Wiring shown as lines or dashes [OK]

Common Mistakes:

• Using '=' as wiring symbol
• Confusing comparison '>' with wiring
• Using '+' which means addition, not wiring

3.

Given a PCB schematic where Pin A of Component X is connected to Pin B of Component Y, and Pin B of Component Y is connected to Pin C of Component Z, what is the correct wiring path?

Component X: Pin A
|
Component Y: Pin B
|
Component Z: Pin C

Which statement is true?

medium

A. Pin A of X is connected to Pin C of Z

B. Pin A of X is not connected to Pin C of Z

C. Pin B of Y is isolated

D. Pin C of Z is connected only to Pin A of X

Solution

1. Step 1: Trace the wiring connections step-by-step

   Pin A of X connects to Pin B of Y, and Pin B of Y connects to Pin C of Z, so all three pins are connected in a chain.

2. Step 2: Understand connection transitivity

   Because Pin B of Y connects both ends, Pin A of X is effectively connected to Pin C of Z through Pin B of Y.

3. Final Answer:

   Pin A of X is connected to Pin C of Z -> Option A

4. Quick Check:

   Connection chain means A to C connected [OK]

Hint: Follow wiring chain to find connected pins [OK]

Common Mistakes:

• Ignoring intermediate connections
• Assuming no connection without direct wire
• Thinking pins are isolated incorrectly

4.

In a PCB design, a wiring error causes two power pins to be connected incorrectly, causing a short circuit. Which of the following is the best way to debug this wiring issue?

medium

A. Check the wiring layers and pin assignments carefully

B. Add more wires to fix the short circuit

C. Ignore the short circuit if the PCB powers on

D. Change component values randomly

Solution

1. Step 1: Identify the cause of the short circuit

   Short circuits often happen due to wrong wiring layers or wrong pin connections.

2. Step 2: Debug by checking wiring layers and pin assignments

   Carefully reviewing wiring layers and pin assignments helps find and fix the error.

3. Final Answer:

   Check the wiring layers and pin assignments carefully -> Option A

4. Quick Check:

   Debug by checking wiring and pins [OK]

Hint: Review wiring layers and pins to find shorts [OK]

Common Mistakes:

• Adding wires without fixing root cause
• Ignoring short circuit warnings
• Changing components without checking wiring

5.

You have a PCB with multiple components that need to be connected in a star topology, where one central component connects to all others individually. Which wiring strategy best ensures clear connections and easy troubleshooting?

hard

A. Randomly connect components to any available pins

B. Connect all components in a daisy chain wiring

C. Use a single wire connecting all components in parallel

D. Use separate wiring traces from the central component to each other component

Solution

1. Step 1: Understand star topology wiring

   Star topology means one central point connects individually to each other point with separate wires.

2. Step 2: Choose wiring strategy for clarity and troubleshooting

   Separate wiring traces from the central component to each other component make it easy to identify and fix issues.

3. Step 3: Evaluate other options

   Daisy chain or parallel wiring mixes connections and makes troubleshooting harder; random wiring causes confusion.

4. Final Answer:

   Use separate wiring traces from the central component to each other component -> Option D

5. Quick Check:

   Star wiring = separate traces [OK]

Hint: Star topology uses separate wires from center [OK]

Common Mistakes:

• Using daisy chain instead of star wiring
• Connecting all components on one wire
• Random wiring causing confusion