On Thursday, 31 January 2019 14:47:19 UTC, whisky-dave wrote:
On Wednesday, 30 January 2019 23:19:52 UTC, tabby wrote:
On Wednesday, 30 January 2019 13:39:43 UTC, whisky-dave wrote:
On Wednesday, 30 January 2019 04:16:40 UTC, Rod Speed wrote:
tabbypurr wrote in message
...

All wallwarts use a transformer.

Not all of them do. Some of the lower
power ones just use a capacitor dropper.

How do they work then ?
How do you know what voltage they produce and how will it convert the AC to DC.



SMPSes just use a smaller one.

Wrong, as always.

They mostly use smaller transformers and therefore lighter than the older sytle linear ones.

they don't mostly use them, they always use them. It's how isolating SMPSUs work.


NT

When there's a liklihood that the current will drawn will mostly be at the higher end of the rating they don't use small transformers to save money.

When you know a triac from a passing car let us know eh.