✧✦Catherine✦✧Feb 28

pov: you wake up to receive a package with a vacuum chamber and discover that the vendor is a crackhead and a menace to society

this is a vacuum chamber. the power supply that comes with it has a type-C connector and it puts 12V on Vbus unconditionally. the pump works off both 5V and 12V, so it can pull vacuum off a normal type-C power supply. but the solenoid release valve (that lets you open the chamber once you're done) requires their illegal type-C-shaped power supply. also, not only does the chamber not support PD negotiation, it does not even have a CC pulldown.

to add insult to injury, it's using a NEMA 1-15P plug.

JakJakMar 1
Show threaddoragasu
@whitequark
Feb 28 at 11:26pmWeb
Show threadROTOPE~1 ⭐️Mar 1

@doragasu @whitequark fuck it, I'll put that shit on D+/D-

I do what I want

Show threadjustJanneMar 1
@rotopenguin @doragasu @whitequark I have a Chinese desk lamp that has 12V on D+ (and most other pins)
Show threadmmu_manMar 1

@doragasu @whitequark

"You might also like:"

UniFi 24V "PoE" injectors that don't know what negociation is.

Show thread✧✦Catherine✦✧Mar 1
@mmu_man @doragasu just recently I discovered (again) that ubnt PoE is fake and it was infuriating
Show threadmmu_manMar 1
@whitequark @doragasu makes you wanna stop being non-violent.
Show threadJernej Simončič �Mar 1
@whitequark @mmu_man @doragasu I think they stopped with passive PoE with WiFi 6 APs.
Show threadDan McDonaldMar 1

@jernej__s @whitequark @mmu_man @doragasu

Thank you SO much for this reminder thread.

I currently have just an AC-Pro ("wifi 5" I think) with one of these awful passive PoE ones, apparently. I've now labelled it per OP.

It *looks like* @jernej__s is correct that modern ubnt ones are standards-obeying PoE now. I'm purchasing and rolling out some soon, but it's also powering same-time-purchased ubnt equipment too. Worst-case is just I label again.

Show threadJernej Simončič �Mar 1
@danmcd @whitequark @mmu_man @doragasu I know that some AC APs also required 802.3af/at PoE, and IIRC even those that shipped with 24V passive PoE adapters could work with 802.3af (I have some UAP-AC-LRs at a client connected to USW-48-PoE, IIRC those shipped with passive power supplies).
Show threadmbpazMar 1
@mmu_man @doragasu @whitequark I see your 24V and raise to 33V
Show threadDarryl RammMar 1

@doragasu @whitequark @tubetime

I do not negotiate with the USB-IF.

Show threadLuna chanMar 1
@doragasu @whitequark High voltage on USB C always made me nervous.