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Circuit Fundamentals Lab（电路基础实验）

Where circuit theory met reality — breadboards, multimeters, and oscilloscopes.

Overview

Circuit Fundamentals Lab is where circuit theory met reality. Using breadboards, resistors, capacitors, power supplies, multimeters, and oscilloscopes, I built and tested the circuits I had only seen in textbooks.

What I Did

  • Verified Ohm's Law and Kirchhoff's Laws by building series and parallel circuits and comparing measured values with calculations
  • Observed RC charging and discharging curves on an oscilloscope
  • Built and tested an RLC resonance circuit, finding the resonance point by sweeping the signal frequency
Breadboard circuit with oscilloscope waveform
A messy breadboard producing a clean waveform — my favorite kind of moment.

What I Learned

My first circuits almost never worked on the first try. I learned to debug systematically: check the power supply first, then every connection, then each component. This "divide and verify" method works not only for circuits but for problems in general.

Reflection

There is a special satisfaction in seeing a messy breadboard produce a clean waveform on the oscilloscope. This course taught me that theory and practice are two halves of the same knowledge — and debugging is where they shake hands.

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