SWYoon Labs

Series navigation: Episode 1: The Roadmap · Episode 2 · Episode 3: Voltage Divider Under Load What this lab builds: A 4.5 V battery, resistor, and red LED connected in series. What it predicts: About 2.3–2.7 mA with a 1 kΩ resistor, before any power is applied. What you will learn: How to use voltage, resistance, continuity, diode, and current modes without confusing series and parallel connections. AI-generated illustration. It shows the kind of setup used in this lab, not a photograph or measurement record from the experiment. Reader guide Indicator Details Article type Guided lab and measurement worksheet Reading time About 10 minutes Difficulty 1/5 — First contact Hands-on time 30–45 minutes Estimated cost About US$15–30 if no tools or parts are already available Prerequisites Episode 1 and the ability to identify voltage, resistance, and current modes on a multimeter Safety level Extra-low-voltage DC only; maximum 4.5 V in this pro...

Where I am starting: I can build software, but I cannot yet claim that I can design and validate a real electronic product. What I am going to do: Follow a practical hardware curriculum, build every important circuit, measure it, and publish the evidence. What readers can do: Follow the same path, beginning with a skills inventory and one safe, low-voltage measurement lab. Series navigation: Episode 1 · Episode 2: Digital Multimeter and LED Circuit · Episode 3: Voltage Divider Under Load Reader guide Indicator Details Article type Series orientation and starting guide Reading time About 12 minutes Difficulty 1/5 — First contact Hands-on time 20–30 minutes for the baseline and equipment inventory Estimated cost None; do not purchase equipment for this article Prerequisites None Safety level Reading and inventory only; do not power a circuit yet Reader outcome Create an honest hardware-skills baseline, inventory available equipment, and...