In this video, we repair LED bulbs. I show you how to disassemble one, and then we look for what's damaged and repair it. In the case of the first bulb, the repair went very quickly, the second one required more effort and a few calculations. At the end of the video, I tell you about the three most popular circuits used in such bulbs. --------------------------Table of contents----------------------- 0:00 Introduction, what ails patients? 0:33 How to disassemble a bulb? 2:12 Inside the first bulb, measuring the voltage 3:44 Looking for breaks on the board, soldering 5:34 Will the bulb light up? 6:23 Disassembling the second bulb 7:06 Carbonized diode 8:41 How to check the forward voltage of a diode? 10:33 A safer way to measure 11:30 What to replace a diode with? 12:38 Calculating the Resistor Value 14:39 What Circuits Are Used in LED Bulbs? 19:17 Ending ----------------------------------------------------------------- Don't want to miss new videos? Subscribe to the channel! My most interesting videos: Good Sounding FM Radio: • How to Make a Simple FM Radio with an Amplifier... Plug-in Power Supply Repair: • Switching-mode power supply repair; How does... Simple FM Radio: • How to Make a Simple FM Radio? Receiver... Portable Regulated Power Supply: • Reliable Regulated Power Supply with Fuse... FM Transmitter: • Long-range FM Transmitter, Constructed... Changing Voltage from 24V to 12V in a Power Supply: • How to Change the Output Voltage in a Pow... Simple Flyback Power Supply: • How to Build a Simple Power Supply in Topolo... Repairing a Power Supply in Which a MOSFET Exploded: • Repairing a Switching-Mode Power Supply in Which... We Repair a Switching-Mode Power Supply: • Repairing a Switching-Mode Power Supply; What's up... Dummy load for testing power supplies: • Dummy load for testing power supplies... Changing the voltage in a switching power supply: • Changing the output voltage in a power supply... Reverse polarity protection: • Protecting systems against reverse polarity... MPPT controller for solar panels: • Solar charger, charge controller... Repairing an energy-saving light bulb: • How to repair an energy-saving light bulb,... We build a switching power supply: • How to build a power supply in the fly topology... Laboratory power supply: • Converting a switching power supply to a la... Repairing a 5V charger: • Repairing a charger, 5V power supply; LCD monitor repair: • How to repair an LCD monitor, what is in it... ATX power supply repair: • How to repair an ATX power supply, what to look for... Battery rectifier: • Automatic rectifier, charger for... Short circuit protection: • Current limiter, overload protection... Step-up/down converter: • Simple and universal control converter... Simple regulated power supply: • Switching power supply conversion to re... 100W converter from 12V to 230 or 325V: • Converter from 12V to 230 or 325V, m... LED oscilloscope: • LED oscilloscope (part 1): introduction... Simple and efficient audio amplifier: • Simple but efficient audio amplifier... Induction heater, high voltages on ZVS: • ZVS circuit, i.e. induction heater... PWM controller for motors and bulbs: • Regulator PWM for Motors and Light Bulbs ... Playlists: Electronics Basics: • Electronics Basics DIY: • DIY Converters: • Converters Repairs: • Repairs