Electronics > Beginners
Mains Supply options for diy (semi-professional) electronics
Benta:
--- Quote from: AndyC_772 on October 30, 2018, 05:32:33 pm ---You chose it, determined it to be suitable, and supplied it to the end customer.
If you incur losses as as result, then you might well have a case against the manufacturer, but you can't just point your customer at the OEM and walk away.
--- End quote ---
Correct. But as the OP keeps it a great secret where he's located, this discussion is difficult.
If we're talking EU here, it's essential that the PSU supplier has a legal entity in the EU, that's your backup.
schmitt trigger:
Another advantage of using a commodity power supply is that in case you start selling them to a different country with different mains voltage/frequency, you don't have to re-design the whole thing.
And last but not least.......the different plug configurations used in different countries.
All the major external PSU vendors already offer most, if not all, the worldwide plug configurations.
csheldon:
For example, see the schematic of Sonnof 4ch pro...https://www.itead.cc/wiki/File:Sonoff_4CH_Pro_Schematic.pdf
It is perfect example of what I want to achieve...SMPS with input voltage of 90-250V, and small transformer, but I can't seem to find ee14 assembled ferrite transformer, this iw1700 IC seems to be obsolete...
does anyone here have recommendations for some IC and ferrite transformer SMPS soultuion for which parts could be easily order from ebay?
If so, please , could you share the knowledge?
tszaboo:
Sonoff is the worst example for this. it is neither safe, nor certified. And they are writing stuff on the labels, that are over the limit of the actual components. If you want to place something on a DIN rail, then just buy a din rail power supply (Its 13 EUR from Meanwell)
james_s:
Why would you even consider designing your own power supply for something like this? There are numerous off the shelf solutions, both external "wall wart" types and power supplies designed to be integrated into equipment.
As someone else said, if you have to ask how to design a power supply, you really shouldn't be doing it unless it's a hobby project to learn about power supply design.
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