In the usual Kuzyatech fashion, when something breaks, we must take it apart. Today, one of the ”early adopter” GU10 style LED lamps decided to fail mechanically:
The power supply is wrapped in some tape. But that does not preclude a bunch of exposed mains line points from being visible
All part numbers sanded off. Diode bridge on the left, controller IC in the middle, optocoupler on the right. Clearance distances- nowhere to be found
Of course you can solder thruhole Aluminum cap across a ceramic. What’s wrong with that?
The lamp uses SHP brand Heatsink/lens combination. LEDs appear to be handsoldered to the metal clad board, with very questionable solder joints
And now to the everyone’s favorite part- reversed engineered schematic diagram. What we have here is basically an isolated (if we ignore for a moment the total lack of clearances between various nodes) power supply with voltage and current feedback. The density of parts and their relative location is such that I doubt this will ever pass any safety tests, but it does seem to work. Thinking that this hazard ran for years makes me stop before buying any new no-name lamps!
For more detail: No-name GU10 LED lamp teardown
About The Author
Ibrar Ayyub
I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.
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