Introduction: Revolutionize Troubleshooting: Build Your Own Circuit Tester

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About: All what I do I'm doing it for fun 🎩 🎮 My name is Chris, I'm an electronics engineer and a Youtuber who likes : Electrical projects 🔌 3D printing ⚙️ Electronic R&D stuff 🔎 We all know that robots are our …

Welcome to this comprehensive tutorial where we'll explore the intricacies of building and utilizing a components tester circuit based on the Current vs Voltage curve tracing technique, an indispensable tool for diagnosing and troubleshooting electronic circuit boards. we'll delve into the step-by-step process of constructing this circuit and unlocking its full potential for electronics enthusiasts.

Supplies

  • Oscilloscope with X-Y display mode
  • 6V AC transformer
  • Resistors: 560 Ohm, 100 Ohm, 1K Ohm
  • Various electronic components (refer to schematic for details)
  • PCB board
  • Black PCB color (optional)
  • PLA filament for 3D printing
  • 2mm threaded inserts
  • Main AC power cable
  • Various tools for soldering and assembly


Step 1: Understanding X-Y Display Mode

Before we embark on our journey, let's take a moment to delve into the fascinating world of X-Y display mode on oscilloscopes. While traditional display modes provide insights into voltage and time relationships, X-Y mode offers a unique perspective by allowing us to plot one input signal against another. This functionality, akin to the mesmerizing Lissajous patterns, enables us to visualize complex interactions between signals and unravel hidden issues within electronic circuits.

Step 2: Introducing the Octopus VI Curve Tracer Circuit

At the heart of our project lies the Octopus VI curve tracer circuit – a multifaceted tool designed to revolutionize electronics testing. By generating an AC excitation signal and plotting voltage against current in real-time using X-Y display mode, this circuit empowers us to analyze the behavior of electronic components with unparalleled precision and efficiency. Whether you're a seasoned electronics enthusiast or a novice, the Octopus VI curve tracer circuit is a must-have addition to your toolkit.

Step 3: Designing the Circuit

Our journey begins with the meticulous design of the components tester circuit using Altium Designer. Incorporating a 6V AC transformer and strategically selected resistors, we ensure optimal performance and safety. The inclusion of a 1KOhm resistor serves to limit current flow, safeguarding both the circuit and the components under test. With careful consideration given to component selection and layout, we lay the foundation for a robust and reliable circuit.

Step 4: PCB Design and Assembly

Transitioning from schematic design to PCB layout, we meticulously arrange components and connections to optimize space and functionality. Leveraging the advanced capabilities of Altium Designer, we generate Gerber files and entrust JLCPCB with the fabrication of our custom PCB. With a choice of black PCB color for aesthetics and durability, we eagerly await the arrival of our meticulously crafted circuit board.

With the arrival of our custom PCB, we embark on the assembly phase, meticulously soldering components and ensuring proper connections. Each resistor, transformer, and probe is carefully integrated into the circuit, with attention to detail paramount. As the circuit takes shape, we marvel at the craftsmanship and precision required to bring our design to life.

Step 5: Enclosure Design and 3D Printing

To provide a safe and user-friendly enclosure for our circuit, we turn to 3D printing technology. Designing a custom housing with PLA filament, we prioritize functionality, aesthetics, and ease of assembly. Incorporating features such as ventilation and cable access points, we ensure optimal performance and user experience. With the addition of threaded inserts for secure assembly, our enclosure is ready to house the Octopus VI curve tracer circuit.

Step 6: Testing and Validation

Before putting our circuit to the test, we conduct thorough voltage measurements to validate functionality and safety. With confidence in our design, we connect the Octopus to the oscilloscope and begin testing various electronic components. Through meticulous observation and analysis, we gain insights into component behavior and circuit performance, honing our troubleshooting skills along the way.

During testing, interpreting the displayed curve is key. A resistor manifests as an oblique line, while a short circuit appears vertical, and an open circuit horizontal. Capacitors form circular curves, with size indicating capacitance. This visual guide swiftly identifies component health.

Conclusion:

As our journey comes to a close, we reflect on the significance of continuous learning and experimentation in the field of electronics. With the Octopus VI curve tracer circuit at our disposal, we're equipped to tackle complex challenges and push the boundaries of electronics testing. Whether you're a seasoned professional or an aspiring enthusiast, this tutorial serves as a testament to the power of innovation and exploration in electronics. Until next time, happy tinkering from Chris!