Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Update 4028.md #108

Open
wants to merge 1 commit into
base: v2.x
Choose a base branch
from
Open

Update 4028.md #108

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion site/docs/guides/4028.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ The black and the red pin are for power, you need to connect these to an always

## PWM

On Delta fans the blue wire is the PWM wire, on Sanyo's it's the brown wire. If you're unsure, refer to your fans datasheet. To control the 4028's the PWM wire is fed a 5V PWM signal from the board. An easy way to do this is to hook it up to the negative terminal of the part cooling fan port (refer to your boards wiring diagram). We need to invert the logic of the fan_part_cooling_pin to generate a PWM signal the fan can understand. You can do that with the following piece of configuration in your user overrides section.
On Delta fans the blue wire is the PWM wire (except on the THA0412BN, where it is the yellow wire), on Sanyo's it's the brown wire. If you're unsure, refer to your fans datasheet. To control the 4028's the PWM wire is fed a 5V PWM signal from the board. An easy way to do this is to hook it up to the negative terminal of the part cooling fan port (refer to your boards wiring diagram). We need to invert the logic of the fan_part_cooling_pin to generate a PWM signal the fan can understand. You can do that with the following piece of configuration in your user overrides section.

:::info
On boards with fan voltage selection (such as the Octopus boards), the voltage doesn't matter. The selector only changes which source the positive pin is connected to. We don't use the positive pin, we use the negative, which is a mosfetted ground connection.
Expand Down