Date: Mon, 18 Nov 2024 12:35:10 +0000 From: Nuno Teixeira <eduardo@freebsd.org> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: FreeBSD ARM List <freebsd-arm@freebsd.org> Subject: Re: rpi4 fan speed control Message-ID: <CAFDf7UJhBW0OGUCZcco48LTCKirdPO_XBkU5T3KTQG=De%2Baaqg@mail.gmail.com> In-Reply-To: <20241118125337.b54d024802f26faac8fa25c2@bidouilliste.com> References: <CAFDf7UKfhWhx4bjOJhhA5yCCR0Sh7PFRA9Dv4n7WUoHjtJssRQ@mail.gmail.com> <20241118125337.b54d024802f26faac8fa25c2@bidouilliste.com>
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--0000000000005fa30206272f269c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Official fan connects same way: https://youtu.be/BP44pCxQWAY?t=3D60 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 =C3=A0= (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-po= wer-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> > --=20 Nuno Teixeira FreeBSD UNIX: <eduardo@FreeBSD.org> Web: https://FreeBSD.org --0000000000005fa30206272f269c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>Official fan connects same way:</div><div><br></div><= div><a href=3D"https://youtu.be/BP44pCxQWAY?t=3D60">https://youtu.be/BP44pC= xQWAY?t=3D60</a></div><div><br></div><div>4 - 5v - Red</div><div>6- GND - B= lack</div><div>8 - GPIO- Blue<br><br><br></div><div>While in some schmatics= for rpi4 8 pin is UART0 TX... Can't get it<br></div></div><br><div cla= ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">Emmanuel Vadot <= ;<a href=3D"mailto:manu@bidouilliste.com">manu@bidouilliste.com</a>> esc= reveu (segunda, 18/11/2024 =C3=A0(s) 11:53):<br></div><blockquote class=3D"= gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20= 4,204,204);padding-left:1ex">On Mon, 18 Nov 2024 11:03:29 +0000<br> Nuno Teixeira <<a href=3D"mailto:eduardo@freebsd.org" target=3D"_blank">= eduardo@freebsd.org</a>> wrote:<br> <br> > Hello all,<br> > <br> > My rpi4 small fan is about to die since it started to have noises. Its= a<br> > small 40x10 fan attached to a plastic box.<br> > <br> > I'm thinking in something like:<br> > <a href=3D"https://www.zdnet.com/home-and-office/the-best-cooler-for-r= aspberry-pi-power-users/" rel=3D"noreferrer" target=3D"_blank">https://www.= zdnet.com/home-and-office/the-best-cooler-for-raspberry-pi-power-users/</a>= <br> > <br> > Anyone controlling speed fan, i.e., not using fan a full speed all the= time?<br> > <br> > Thanks,<br> > <br> > -- <br> > Nuno Teixeira<br> > FreeBSD UNIX:=C2=A0 <eduardo@FreeBSD.org>=C2=A0 =C2=A0Web:=C2=A0= <a href=3D"https://FreeBSD.org" rel=3D"noreferrer" target=3D"_blank">https= ://FreeBSD.org</a><br> <br> =C2=A0I find the wiring a bit weird, usually you use a pwm controller to<br= > control the speed of a fan and we have support for rpi pwm (even though<br> it's not handled by the pwm(4) framework iirc) but on the website they<= br> plug the control pin to the uart TX ???<br> <br> =C2=A0Cheers<br> <br> -- <br> Emmanuel Vadot <<a href=3D"mailto:manu@bidouilliste.com" target=3D"_blan= k">manu@bidouilliste.com</a>> <<a href=3D"mailto:manu@freebsd.org" ta= rget=3D"_blank">manu@freebsd.org</a>><br> </blockquote></div><div><br clear=3D"all"></div><br><span class=3D"gmail_si= gnature_prefix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature"><d= iv dir=3D"ltr"><div><font color=3D"#888888">Nuno Teixeira</font></div><div>= <div><font color=3D"#888888"> FreeBSD UNIX:=C2=A0 <eduardo@FreeBSD.org>=C2=A0 =C2=A0Web:=C2=A0 <a h= ref=3D"https://FreeBSD.org" rel=3D"noreferrer" target=3D"_blank">https://Fr= eeBSD.org</a><br></font></div></div></div></div> --0000000000005fa30206272f269c--
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