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🔧 Practical Skills

This page collects practical tips on hardware operation, debugging techniques, tool usage, and more.

💡 Tip 1: DuPont Wire Color Convention​

Problem: Wiring in creative projects can be color-muddled, making troubleshooting difficult.

Solution: Establish a unified color convention for DuPont wires, power wires, and signal wires.

Core Idea

Reduce cognitive load through color standardization, improving efficiency in creative project development and troubleshooting.

Basic Conventions​

By Purpose​

ColorUse
🔴 RedPower Positive (VCC)
âšĢ BlackGround (GND)
đŸ”ĩ🟡đŸŸĸ ColorfulSignal Wires

Number/Ordinal Mapping​

Wherever numbers or ordinals exist, strictly follow this mapping:

ColorNumber/Ordinal
🟤 Brown1
🔴 Red2
🟠 Orange3
🟡 Yellow4
đŸŸĸ Green5
đŸ”ĩ Blue6
đŸŸŖ Purple7
âšĒ Gray8

UART Serial Communication​

ColorSignal
🟤 BrownGND
🔴 RedVCC (5V/3.3V)
🟡 YellowTX
🟠 OrangeRX

Row Display: 🟤 🔴 🟡 🟠

I2C Bus​

ColorSignal
🟤 BrownGND
🔴 RedVCC (5V/3.3V)
🟡 YellowSCL
🟠 OrangeSDA

Row Display: 🟤 🔴 🟡 🟠

Clock and Data Signals​

  • CLK Signal → 🟡 Yellow
  • DATA Signal → đŸŸĸ Green

Multi-module V/G/S 3-wire Sets​

Set 1: 🟤 🔴 🟠

  • 🟤 Brown → GND
  • 🔴 Red → VCC
  • 🟠 Orange → Signal

Set 2: 🟡 đŸŸĸ đŸ”ĩ

  • 🟡 Yellow → GND
  • đŸŸĸ Green → VCC
  • đŸ”ĩ Blue → Signal

Set 3: đŸŸŖ âŦœ âšĒ

  • đŸŸŖ Purple → GND
  • âŦœ White → VCC
  • âšĒ Gray → Signal

7-segment Display​

According to the number/ordinal mapping, segments a-g correspond to 1-8 in order:

Segment a-g Color Order: 🟤 🔴 🟠 🟡 đŸŸĸ đŸ”ĩ đŸŸŖ âšĒ

SegmentOrdinalColor
a1🟤 Brown
b2🔴 Red
c3🟠 Orange
d4🟡 Yellow
e5đŸŸĸ Green
f6đŸ”ĩ Blue
g7đŸŸŖ Purple
dp8âšĒ Gray

Power and Ground:

  • âŦœ White → VCC
  • âšĢ Black → GND

📌 Important Notes​

warning

The above is just personal practice. Teachers can agree with students or establish a unified color-signal mapping in advance.

For Large Projects: Use a label maker or marked wire clips for clearer and more reliable identification.

✨ Benefits​

BeneficiaryBenefits
StudentsReduced cognitive load, faster understanding of circuit structure, focus on creativity and logic
TeachingImproved classroom efficiency, quick problem localization (power/ground/signal), more precise guidance
Engineering ThinkingTransfer of standardization and normalization concepts, essential for engineers

💡 Tip 2: Using DuPont Wires in Rows and Adjacent Color Matching​

Problem: DuPont wires are hard to organize after being torn apart, and scattered storage causes confusion.

Solution: Try to use DuPont wires in rows and cleverly utilize adjacent color combinations.

Why Use in Rows​

AdvantageExplanation
đŸ“Ļ Easy StorageRow storage saves space and reduces loss
🚀 Quick AccessDirectly pick adjacent wires when similar colors are needed
🎨 Visual ClarityRow wiring looks neater and more aesthetically pleasing

Adjacent Color Matching Tips​

Basic Idea​

  • Use adjacent color relationships from factory production
  • Design reasonable color groups based on functional requirements
  • Maintain consistency to reduce memory burden

Practical Suggestions​

Power-Ground-Signal 3-wire Set:

  • Adjacent three wires: 🟤 Brown (GND) - 🔴 Red (VCC) - 🟠 Orange (Signal)
  • Row Display: 🟤 🔴 🟠
  • Benefit: These three colors are usually continuous, tear and use together

Multi-module Parallel Connection:

  • Module 1: 🟤 🔴 🟠
  • Module 2: 🟡 đŸŸĸ đŸ”ĩ
  • Module 3: đŸŸŖ âŦœ âšĒ
  • Each set uses adjacent three colors for easy management

Bus-style Connection:

  • I2C: 🟤 🔴 🟡 🟠 (four continuous wires)
  • SPI: 🟤 🔴 🟡 đŸŸĸ (four continuous wires)

📌 Operation Suggestions​

  1. Tear as Needed

    • Don't tear too many at once
    • Tear only what you need
    • Keep remaining DuPont wires in row state

  2. Group Storage

    • Tear and prepare commonly used color groups in advance
    • Keep less commonly used ones in factory state
    • Organize and put back after use

  3. Coordinate with Color Convention

    • Color convention + row use = double guarantee
    • Both standardized and efficient

✨ Actual Effects​

After doing this:

  • Wiring is more organized
  • Finding wires is faster
  • Classroom desk is tidier
  • Students understand and imitate more easily

📋 More Content​

This page is continuously updated, stay tuned!

If you have related practical tips to share, feel free to submit!