this post was submitted on 03 Jul 2023
18 points (100.0% liked)

Ask Electronics

3316 readers
1 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.

founded 1 year ago
MODERATORS
DavideAndrea@discuss.tchncs.de
linker3000@discuss.tchncs.de
18
Making a USB desk fan from spare CPU fan (lemmy.world)
submitted 1 year ago by Devils69Advocate@lemmy.world to c/askelectronics@discuss.tchncs.de
11 comments fedilink hide all child comments
 

If I wanted to make a USB desk fan from a spare CPU fan (input: 12V, 0.15A), could I just solder a resistor to the positive lead of the USB wire? I plan on getting an adjustable voltage booster, but I was curious if this was possible. I think I would need a 13 ohm resistor for USB 3.0.

you are viewing a single comment's thread
view the rest of the comments
[–] human_no_4815162342@discuss.tchncs.de 2 points 1 year ago* (last edited 1 year ago)

That's not what I was saying, PD included 12v up to 2.0 (I am going from memory) so it's not multi standard support but retrocompatibility from modern PD to the older version

Edit: I checked and the requirement was removed from rev 1 to rev 2 so now it's optional