Скачать или смотреть 🔌Voltage Divider Loading Effect: Design Rules & Troubleshooting 🧰 Ep. 73

🔌 Ever measure an 8-volt divider and get 6.1 volts? Your multimeter isn't broken—it's "loading" the circuit. In this video, we explain why attaching a load (even a meter) pulls your voltage down, and give you a simple design rule to fix it.

We break down the "Parallel Resistance Trap" that catches new techs and show you how to size your divider current so your readings stay accurate.

🔥 In this lesson: 0:00 Intro: Why your meter changes the voltage 0:43 The Basics: What is a Voltage Divider & "Loading"? 1:19 The Divider Model: Visualizing the Output Node 1:35 What Loading Means: Parallel Resistance = Voltage Sag 2:18 Design Recipe: The 10:1 Current Rule 3:00 Calculating Values: Bottom Leg Parallel Math 4:07 Quick Estimate: 12V Source Example 4:37 Sanity Checks: Loop KVL & Node KCL 5:12 Summary: Design for the Load, not the Open Circuit

🛠️ The "10:1 Design Rule": Make your Divider Current at least 10x your expected Load Current. This makes the load's effect negligible for most applications.

📚 Resources:

Free Textbook (ModEL): http://ibiblio.org/kuphaldt/socratic/...

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