I suppose that reply begs the question "how are we supposed to know which ones are 'switch mode' power supplies anyway?", as it isn't always apparent from a brief description.redhawk wrote:None of my switch mode power supplies overheat it sounds like you've having some bad luck.
Take a look at the input voltage range. I don't know of a way to build a reasonable linear power supply with 100VAC to 240VAC input range, and I'd be surprised to find a linear wall wart with such an input range unless it had a manual voltage range switch. OTOH, automatically using a wide input voltage range is easy with a switching power supply.Montala wrote:I suppose that reply begs the question "how are we supposed to know which ones are 'switch mode' power supplies anyway?", as it isn't always apparent from a brief description.
That's a joke right?Holy One wrote:I'm not clear of the use of 'switching' in this context.
A very nice selection of power supplies which won't unfortunately help those of us here in the UK, as they will not be available in the same configuration.jbeale wrote:I tested a few 1A 5V USB power supplies as you see here. They range from 67 to 72% efficient while delivering 1 A. In other words, while delivering 5 W of useful electrical power they are wasting about 1.5 W, which is not too bad.
https://picasaweb.google.com/1099282360 ... 4502902834
This is a great psu. I have one, ordered from those guys and it never gets warm to the touch under load. Highly recommended if you are planning to run your pi as a webserver or other always-on role. Just make sure you flip it over to 5v before first turning it on.Holy One wrote:ok so I found this: http://www.kenable.co.uk/product_info.p ... ts_id=5642
data sheet: https://www.distrelec.de/ishop/Datashee ... ng_tds.pdf
I'm not clear of the use of 'switching' in this context. It seems to be a bit of marketing spin to pass off a psu with an actual switch on it as 'switching' without being very specific if that applies to the internal functioning smps or not. Sheesh.
Also it compies with eup in the datasheet but is being sold as CEC Level V. Again not sure if srs.
It was £11.50 inc VAT and delivery so I'll give it a shot.