Re: rpi4 fan speed control

Official fan connects same way:

https://youtu.be/BP44pCxQWAY?t=60

4 - 5v - Red
6- GND - Black
8 - GPIO- Blue


While in some schmatics for rpi4 8 pin is UART0 TX... Can't get it

Emmanuel Vadot <manu@bidouilliste.com> escreveu (segunda, 18/11/2024 à(s)
11:53):

> On Mon, 18 Nov 2024 11:03:29 +0000
> Nuno Teixeira <eduardo@freebsd.org> wrote:
>
> > Hello all,
> >
> > My rpi4 small fan is about to die since it started to have noises. Its a
> > small 40x10 fan attached to a plastic box.
> >
> > I'm thinking in something like:
> >
> https://www.zdnet.com/home-and-office/the-best-cooler-for-raspberry-pi-power-users/
> >
> > Anyone controlling speed fan, i.e., not using fan a full speed all the
> time?
> >
> > Thanks,
> >
> > --
> > Nuno Teixeira
> > FreeBSD UNIX:  <eduardo@FreeBSD.org>   Web:  https://FreeBSD.org
>
>  I find the wiring a bit weird, usually you use a pwm controller to
> control the speed of a fan and we have support for rpi pwm (even though
> it's not handled by the pwm(4) framework iirc) but on the website they
> plug the control pin to the uart TX ???
>
>  Cheers
>
> --
> Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org>
>


-- 
Nuno Teixeira
FreeBSD UNIX:  <eduardo@FreeBSD.org>   Web:  https://FreeBSD.org