Alex: Disorder or IRC server.
Graham Smith <[email protected]> Thu, 10 Aug 2023 20:57:11 +1200
| Newsgroups | gmane.comp.science.openeeg.general |
|---|---|
| Message-ID | <CADmeSE9678bgBFpfW2ToSHLnU1NbYdKz8D--gjktLTPSio6OFA@mail.gmail.com> |
--===============8485061401990208847== Content-Type: multipart/alternative; boundary="000000000000d3390606028dc8a2" --000000000000d3390606028dc8a2 Content-Type: text/plain; charset="UTF-8" Thanks for the offer, Alex. I vote, : "Yes". Graham On Thu, 10 Aug 2023, 2:58 pm , <[email protected]> wrote: > Send Openeeg-list mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/openeeg-list > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Openeeg-list digest..." > > > Today's Topics: > > 1. Re: Besselworth calculations (Alexander Houston) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 9 Aug 2023 22:57:53 -0400 > From: Alexander Houston <[email protected]> > To: "Discussion of EEG hardware, software, training protocols, NFB > theory - for developers and users." > <[email protected]> > Subject: Re: [Openeeg-list] Besselworth calculations > Message-ID: > < > CAEBVZDCND0-BhLZtfha0BMe4tT-O_ne0--4SH+Fb5M4szxYTeg@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > All, > > Would anybody be opposed to creating a discord or IRC server for this > project? The state of things right now is not friendly for newcomers to the > project, as most everything is scattered around old wikis, codebases, and > posts on this mailing list. Many links to the original sourceforge projects > are only accessible via archival sites like Wayback. > > As a newcomer myself, I don't feel it's my place to admin over a server > like this. However, I'm happy to create one if interest is high but > familiarity with discord is low. > > OpenEEG is a banger hobby concept and it deserves to be accessible in a > post web 1.0 world ? > > Steve: sadly I cannot even begin to comprehend your question, sorry! > > Best, > Alex. > > On Wed, Aug 9, 2023 at 10:42?PM Stephen McInturff < > [email protected]> wrote: > > > Hello, > > > > I'm not sure if this project is still ongoing but I'm going to post and > > wish for the best. > > > > I am attempting to build an Auditory Brainstem Response (ABR) amplifier. > > The circuit is very much the same as the designs for the "modularEEG" > > except that the filters are different (I want 300-3kHz while the current > > designs are mostly <100 Hz). This would mainly involve modifying the > > "besselworth filter", see screenshot below. > > > > My question is how was the cutoff frequency of 59Hz calculated? The > > equations I've found for this are Fc = 1/(2*pi*sqrt(R232*R288*C234*C231)) > > which equals 152.5 Hz and the gain calculation Gain = (1+R230/R229) = > 13.19x > > > > Could someone help explain how these numbers were calculated in the > > schematic? I understand that the 3rd pole of this filter is on the > digital > > board but how would that play into the calculations? > > > > Thank you, > > Steve Mci > > > > [image: image.png] > > _______________________________________________ > > Openeeg-list mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/openeeg-list > > Go to the above address to change your > > subscription options, e.g unsubscribe. > > > -------------- next part -------------- > An HTML attachment was scrubbed... > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: image.png > Type: image/png > Size: 185278 bytes > Desc: not available > > ------------------------------ > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Openeeg-list mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/openeeg-list > > > ------------------------------ > > End of Openeeg-list Digest, Vol 152, Issue 3 > ******************************************** > --000000000000d3390606028dc8a2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"auto"><div>Thanks for the offer, Alex.</div><div dir=3D"auto"><= br>I vote, : "Yes".</div><div dir=3D"auto"><br></div><div dir=3D"= auto">Graham</div><div dir=3D"auto"><br></div><div dir=3D"auto"><br><div cl= ass=3D"gmail_quote" dir=3D"auto"><div dir=3D"ltr" class=3D"gmail_attr">On T= hu, 10 Aug 2023, 2:58 pm , <<a href=3D"mailto:openeeg-list-request@lists= .sourceforge.net">[email protected]</a>> wrote:= <br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord= er-left:1px #ccc solid;padding-left:1ex">Send Openeeg-list mailing list sub= missions to<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"mailto:[email protected]= e.net" target=3D"_blank" rel=3D"noreferrer">[email protected].= net</a><br> <br> To subscribe or unsubscribe via the World Wide Web, visit<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://lists.sourceforge.net/lists/= listinfo/openeeg-list" rel=3D"noreferrer noreferrer" target=3D"_blank">http= s://lists.sourceforge.net/lists/listinfo/openeeg-list</a><br> or, via email, send a message with subject or body 'help' to<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"mailto:[email protected]= urceforge.net" target=3D"_blank" rel=3D"noreferrer">openeeg-list-request@li= sts.sourceforge.net</a><br> <br> You can reach the person managing the list at<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"mailto:[email protected]= ceforge.net" target=3D"_blank" rel=3D"noreferrer">openeeg-list-owner@lists.= sourceforge.net</a><br> <br> When replying, please edit your Subject line so it is more specific<br> than "Re: Contents of Openeeg-list digest..."<br> <br> <br> Today's Topics:<br> <br> =C2=A0 =C2=A01. Re: Besselworth calculations (Alexander Houston)<br> <br> <br> ----------------------------------------------------------------------<br> <br> Message: 1<br> Date: Wed, 9 Aug 2023 22:57:53 -0400<br> From: Alexander Houston <<a href=3D"mailto:[email protected]" target= =3D"_blank" rel=3D"noreferrer">[email protected]</a>><br> To: "Discussion of EEG hardware, software, training protocols, NFB<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 theory - for developers and users."<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 <<a href=3D"mailto:[email protected]= forge.net" target=3D"_blank" rel=3D"noreferrer">[email protected]= rge.net</a>><br> Subject: Re: [Openeeg-list] Besselworth calculations<br> Message-ID:<br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 <<a href=3D"mailto:CAEBVZDCND0-BhLZtfha0BMe4= tT-O_ne0--4SH%[email protected]" target=3D"_blank" rel=3D"noref= errer">CAEBVZDCND0-BhLZtfha0BMe4tT-O_ne0--4SH+Fb5M4szxYTeg@mail.gmail.com</= a>><br> Content-Type: text/plain; charset=3D"utf-8"<br> <br> All,<br> <br> Would anybody be opposed to creating a discord or IRC server for this<br> project? The state of things right now is not friendly for newcomers to the= <br> project, as most everything is scattered around old wikis, codebases, and<b= r> posts on this mailing list. Many links to the original sourceforge projects= <br> are only accessible via archival sites like Wayback.<br> <br> As a newcomer myself, I don't feel it's my place to admin over a se= rver<br> like this. However, I'm happy to create one if interest is high but<br> familiarity with discord is low.<br> <br> OpenEEG is a banger hobby concept and it deserves to be accessible in a<br> post web 1.0 world ?<br> <br> Steve: sadly I cannot even begin to comprehend your question, sorry!<br> <br> Best,<br> Alex.<br> <br> On Wed, Aug 9, 2023 at 10:42?PM Stephen McInturff <<br> <a href=3D"mailto:[email protected]" target=3D"_blank" rel=3D"nore= ferrer">[email protected]</a>> wrote:<br> <br> > Hello,<br> ><br> > I'm not sure if this project is still ongoing but I'm going to= post and<br> > wish for the best.<br> ><br> > I am attempting to build an Auditory Brainstem Response (ABR) amplifie= r.<br> > The circuit is very much the same as the designs for the "modular= EEG"<br> > except that the filters are different (I want 300-3kHz while the curre= nt<br> > designs are mostly <100 Hz). This would mainly involve modifying th= e<br> > "besselworth filter", see screenshot below.<br> ><br> > My question is how was the cutoff frequency of 59Hz calculated? The<br= > > equations I've found for this are Fc =3D 1/(2*pi*sqrt(R232*R288*C2= 34*C231))<br> > which equals 152.5 Hz and the gain calculation Gain =3D (1+R230/R229) = =3D 13.19x<br> ><br> > Could someone help explain how these numbers were calculated in the<br= > > schematic? I understand that the 3rd pole of this filter is on the dig= ital<br> > board but how would that play into the calculations?<br> ><br> > Thank you,<br> > Steve Mci<br> ><br> > [image: image.png]<br> > _______________________________________________<br> > Openeeg-list mailing list<br> > <a href=3D"mailto:[email protected]" target=3D"_blank= " rel=3D"noreferrer">[email protected]</a><br> > <a href=3D"https://lists.sourceforge.net/lists/listinfo/openeeg-list" = rel=3D"noreferrer noreferrer" target=3D"_blank">https://lists.sourceforge.n= et/lists/listinfo/openeeg-list</a><br> > Go to the above address to change your<br> > subscription options, e.g unsubscribe.<br> ><br> -------------- next part --------------<br> An HTML attachment was scrubbed...<br> -------------- next part --------------<br> A non-text attachment was scrubbed...<br> Name: image.png<br> Type: image/png<br> Size: 185278 bytes<br> Desc: not available<br> <br> ------------------------------<br> <br> <br> <br> ------------------------------<br> <br> Subject: Digest Footer<br> <br> _______________________________________________<br> Openeeg-list mailing list<br> <a href=3D"mailto:[email protected]" target=3D"_blank" rel= =3D"noreferrer">[email protected]</a><br> <a href=3D"https://lists.sourceforge.net/lists/listinfo/openeeg-list" rel= =3D"noreferrer noreferrer" target=3D"_blank">https://lists.sourceforge.net/= lists/listinfo/openeeg-list</a><br> <br> <br> ------------------------------<br> <br> End of Openeeg-list Digest, Vol 152, Issue 3<br> ********************************************<br> </blockquote></div></div></div> --000000000000d3390606028dc8a2-- --===============8485061401990208847== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline --===============8485061401990208847== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline