Why This Circuit Works When It Shouldn’t

Learn how to extract useful energy from dead batteries,. Check out PCBWAY➡️ https://www.pcbway.com/ for PCB's, 3D printing and CNC at expectational value and design PCB's with Altium ➡️ http://altium.com/yt/engineeringmindset In this video, we explain how a simple Joule Thief circuit boosts low voltage using inductors, transistors, and Faraday’s law. Learn how it works, why it works, and how to build one yourself with a DIY kit or custom PCB. Learn how transistors, inductors, toroid transformers, LED and resistors work. 🛠️ Build the kit yourself 🛠️ Want to build the kit at home, click here:👉 https://tinyurl.com/Joule-Thief-Kit Want to order just the PCB, click here:👉 https://tinyurl.com/Get-PCB-only 🎁 Design, review, and manage PCBs in one connected environment with Altium Designer. Get a 30-day free trial here ➡️ http://altium.com/yt/engineeringmindset Check out our article: ➡️ https://theengineeringmindset.com/why... ⚡🛠️ TOOLS YOU NEED 🛠️⚡ ******************************* Get this electronics book ➡️ https://amzn.to/41cCJPk Professional Multimeter -➡️ https://amzn.to/3xu2Vaw Good multimeter -➡️ https://amzn.to/3xrbuTd Professional clamp meter ➡️ https://amzn.to/4140FnK Good Clamp meter ➡️ https://amzn.to/3xqt2is Outlet tester ➡️- https://amzn.to/3kavg2l Energy monitoring plug ➡️ https://amzn.to/3SkfPl7 Battery tester -➡️ https://amzn.to/3S3fHWI Basic electronics ➡️ kit https://amzn.to/3xuLiqS MY FAVOURITE GEAR 🎥 My camera - https://amzn.to/3YCZ7Q9 🎤 My Microphone - https://amzn.to/3YYXsUC ⌨️ My Keyboard - https://amzn.to/3lBsl33 🖥️ My monitor - https://amzn.to/415BGjW 🎧 My headphones - https://amzn.to/3lN7R7u 👋 SOCIALISE WITH US 👋 ******************************* 👉FACEBOOK:   / theengineeringmindset   👉TWITTER:   / theengmindset   👉INSTAGRAM:   / engineeringmindset   👉WEBSITE: Http://TheEngineeringMindset.com [0:00] Dead Battery Powers an LED? How This Is Possible [0:18] The Clever Joule Thief Circuit Explained [0:28] How to Build This DIY LED Booster Circuit [0:45] Circuit Components Overview (Switch, Toroid, Resistor, Transistor) [1:10] Current Flow in the Circuit: Path A vs Path B [2:10] How the Joule Thief Starts Oscillating [3:32] How a Resistor Works in This Circuit [4:13] How a Transistor Works as an Electronic Switch [5:35] Why the Toroid Coil Is So Important [6:00] Electromagnetic Fields, Coils, and Inductors Explained [7:20] Self-Inductance: Why Current Cannot Change Instantly [8:24] Why a Ferrite Core Improves Inductor Performance [8:40] Faraday’s Law and Mutual Inductance Explained [9:32] How a Changing Magnetic Field Induces Voltage [10:20] Lenz’s Law Explained with Coil and Magnet Examples [11:15] Coil Polarity and Induced Current Direction [12:17] Why the Two Toroid Windings Must Oppose Each Other [14:23] Full Joule Thief Circuit Operation Step by Step [15:10] Core Saturation: Why the Transistor Suddenly Switches Off [16:03] Inductive Kickback and the High Voltage Spike Explained [16:41] How the LED Turns On from a Dead Battery [17:07] Why the LED Looks Continuous Even Though It Is Pulsing [17:22] How LEDs Work: Diodes, Threshold Voltage, and Light Emission [18:21] Why a White LED Proves Voltage Boosting [18:31] DIY Kit and PCB Build Options [19:33] Breadboard Prototype and PCB Soldering Guide [20:21] North Pole Coil Direction Answer