[-] mattreb@feddit.it 2 points 3 days ago

Thanks for the interesting write-up!

[-] mattreb@feddit.it 3 points 4 days ago

Thanks, I'll have a look. It's an universal mains power supply with no voltage switch.

[-] mattreb@feddit.it 5 points 4 days ago

How were you measuring the current in the power cable? Is this with a Kill-o-watt device or perhaps with a clamp meter and a line splitter?

For the current both with a line-splitter+clamp and checked with an in-line meter. For the power factor, since I don't have any actual instrument to measure It, and I just needed a ball-park figure to discern actual consumption from a capacitor, I used this diy method: https://www.giangrandi.org/electronics/cosphi/cosphi.shtml , which measured 0.04 ( with great approximation ).

As for why there is a capacitor across the mains input [...]

I have the basic on how a switching power supply work, but I was asking because it seemed weird to me that commercial appliances didn't take any stand-by meaures to avoid "keeping the wires warm"... is this the norm?

7
submitted 4 days ago* (last edited 3 days ago) by mattreb@feddit.it to c/askelectronics@discuss.tchncs.de

Bought a new PC, and I was measuring its consumption out of curiosity. I noticed something weird (to me): when the PC is off (in fact, I completely disconnected the PSU and did the same test), there is quite some current running in the power cable to the PSU (0.15A).

Further measures showed a power factor of (almost) zero, and I can actually measure a capacity of 2uF across the PSU ac input.

I did the same thing on an older PC I have, and there is no current / capacity. So what would the reason of a capacitor across the mains on the input be in a PSU?

PS: the PSU is a Thermaltake Toughpower GF A3 1050W

Edit: I found some official measurements for this specific PSU: https://www.cybenetics.com/evaluations/psus/2249/ that have 40W standby apparent-power by design

8
submitted 1 month ago* (last edited 1 month ago) by mattreb@feddit.it to c/mechanicalkeyboards@lemmy.ml

Hi! I'm relatively new to mechanical keyboards and I need some help.

I need a 60% that will allow to toggle between two mode, one for writing and one for cursor movement with arrows (possibly on IJKL).

From what I found most of the 60% use the Fn button for arrows, but you have to keep it pressed, which will not work for me... I need to actually toggle the alternative layout. Some 60% have a "Fn lock" to support this, but it's hard to tell by just looking at their specs...

Do you know any model with a similar feature?

[-] mattreb@feddit.it 13 points 3 months ago

The main issue is more about how many FOSS devs are available to implement what you just said unfortunately...

[-] mattreb@feddit.it 20 points 7 months ago

Yuzu [...] allows for the play of encrypted Nintendo Switch games on devices other than a Nintendo Switch.

That's pretty much the whole statement, claiming this to be a crime is just infuriating.

It's like claiming that you can't use the ink inside a printer cartridge you bought, unless you use it with the specific branded printer.

[-] mattreb@feddit.it 15 points 7 months ago

Recently Teams is blocking Firefox even on Windows, but changing user agent was enough in my case...

[-] mattreb@feddit.it 92 points 11 months ago
4

Come da titolo volevo investire qualche risparmio in un fondo ETF, e al di la del fondo mi chiedevo che piattaforma era meglio usare: uso da qualche tempo Directa, ma dando un occhiata ai volumi giornalieri dei fondi piu' "famosi", questi sembrano bassissimi, molti sotto i 100k!!

Ora premesso che so che gli ETF sono scambiati diversamente e che il volume non causa direttamente problemi di liquidita', ma gli italiani che investono in ETF dove li acquistano? Avevo dato per scontato che Directa fosse quella piu' quotata ma evidentemente mi sbaglio....

[-] mattreb@feddit.it 13 points 1 year ago* (last edited 1 year ago)

Tv and movies don't look choppy because the shutter speed of the camera smooth out the movement with motion blur. Motion blur in games is instead just simulated and not as effective.

Also as someone else have said a game is interactive and input latency can be as high as 3 frames, which at 30fps would be 1/10s and can be perceived....

[-] mattreb@feddit.it 20 points 1 year ago

I'll give a different perspective on what you said: dx12 basically moved half of the complexity that would normally be managed by a driver, to the game / engine dev, which already have too much stuff to do: making the game. The idea is that "the game dev knows best how to optimize for its specific usage" but in reality the game dev have no time to deal with hardware complexity and this is the result.

[-] mattreb@feddit.it 29 points 1 year ago

On desktop, I'm really wondering why people use it. I mean it's not pre-installed for windows, what makes people choose Chrome in 2023?

2
submitted 1 year ago* (last edited 1 year ago) by mattreb@feddit.it to c/eticadigitale@feddit.it

A quanto pare disattivando la cronologia, dopo varie richieste di riattivarla, youtube sostituisce l'intera homepage con l'avviso dell'immagine ("La tua cronologia delle visualizzazioni e' disattivata"). In pratica devi pagarla con i tuoi dati? Ho pensato fosse interessante....

[-] mattreb@feddit.it 18 points 1 year ago

This is so sad, I don't understand how any moderator would still feel ok to stay on reddit... Thank you for sharing

[-] mattreb@feddit.it 14 points 1 year ago

If communities belonged to "lemmy" you would have Reddit. If anything would be forcefully federated it would be a mess. IMHO it's the right balance. I get your concerns about being confusing but given the state of development of the platform most of it will be solved by a better UI and better instance data synchronization policies, etc...

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mattreb

joined 1 year ago