Timeline for How can a Lenovo ThinkPad get the power rating from a power supply with only a two-pin connector?
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 25 at 21:17 | vote | accept | U. Windl | ||
| Nov 24 at 19:26 | answer | added | U. Windl | timeline score: 2 | |
| Nov 24 at 3:40 | history | became hot network question | |||
| Nov 23 at 22:30 | comment | added | U. Windl | @Transistor Yes, Chester Gillon said the same before as comment for electronics.stackexchange.com/a/731677/282833 | |
| Nov 23 at 22:25 | comment | added | Transistor | See superuser.com/a/1246834/511090 on SuperUser. | |
| Nov 23 at 21:34 | comment | added | Justme | @U.Windl We don't have to speculate, we know for a fact. See my answer. | |
| Nov 23 at 21:33 | answer | added | Justme | timeline score: 4 | |
| Nov 23 at 21:21 | comment | added | U. Windl | ..or it could implement the powerline protocol ;-) I mean: we could speculate a lot while not knowing... | |
| Nov 23 at 21:16 | comment | added | dandavis | it could simply notice the voltage drop when it tries to pull as much power as it can. It could also provide slightly different voltages from different power ratings and detect that. | |
| Nov 23 at 21:10 | comment | added | Hearth | @U.Windl There are ways to multiplex data onto a power line, and I guess that must be what it's doing here, then. I'm not sure what else it could be doing. | |
| Nov 23 at 21:08 | comment | added | U. Windl | @Hearth Sorry, I inspected the plug very carefully after reading this, but I could not find a third contact: Inside the yellow plug all is plastic, except the pin in the middle, so there's just the outside and the middle pin. | |
| Nov 23 at 20:10 | comment | added | Marcus Müller | @Hearth exactly that's the case! | |
| Nov 23 at 19:51 | comment | added | Hearth | There may be a third pin hidden somewhere in there. It looks like at least one of the sides on the inside might be metal? | |
| Nov 23 at 19:39 | history | asked | U. Windl | CC BY-SA 4.0 |