bigclive
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Unusually safe Chinese eBay lights
🕑 Added 2023-11-18 16:11:41 +0000 UTCI was almost hoping this power supply was going to be terrible inside, but it actually seems to be made to local safety standards.
It took a while to reverse engineer the primary side circuitry, because the chip isn't one I recognise and I didn't get any clues from the number on the IC. Even a search for a cloned original didn't find any with a matching pinout.
It does have some hackability for reducing the current delivered to the LEDs, and unlike many high-street versions here, it actually has the memory chip for storing the last setting.
It could be viable to buy a string of these just for the power supply if you have a matching two wire 30V set that defaults to flashing effects or has a failed power supply.
https://www.youtube.com/watch?v=ajnw_b8FBRU
Comments
There's a discussion of the EU (rather than UK) version of the power supply at https://github.com/arendst/Tasmota/discussions/14016. Tasmota is open-source software for ESP devices, so this thing might have hidden tricks up its sleeve.
Dave Frederick
Very cool and thank you Big Clive. Sometimes it's nice when you get stuff that's compliant and decent so as to offer a contrast to the spicy dangerous stuff. The cutout around the 10 ohm resister is interesting. My first thought was for making it fit in more of a streamline fashion but yea, the failure of such won't make a metallic dead short track between the live and neutral. Nice. Thanks for sharing.
Seán Byrne
I think this is the first electronics item I seen you feature that has the new UK CA logo, but not a CE logo.
