bristol@mailman.lug.org.uk
To subscribe or unsubscribe via the World Wide Web, visit
https://mailman.lug.org.uk/mailman/listinfo/bristol
or, via email, send a message with subject or body 'help' to
bristol-request@mailman.lug.org.uk
You can reach the person managing the list at
bristol-owner@mailman.lug.org.uk
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Bristol digest..."
Today's Topics:
1. Re: Events! LPD, FOSDEM, etc. (Steve Netting)
2. Re: Capacitive switch test (Steve Netting)
3. Re: Events! LPD, FOSDEM, etc. (Samir Benmendil)
4. Re: Capacitive switch test (Amias Channer)
5. Re: Capacitive switch test (Andrew)
6. Re: Capacitive switch test (Steve Netting)
7. Re: Capacitive switch test (Steve Netting)
----------------------------------------------------------------------
Message: 1
Date: Wed, 26 Oct 2016 23:32:00 +0100
From: Steve Netting <steve@track3.org.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Events! LPD, FOSDEM, etc.
Message-ID: <1c5e64a2-e059-704c-c451-30624fa7bfaa@netting.org.uk>
Content-Type: text/plain; charset=utf-8
On 26/10/16 21:56, Samir Benmendil via Bristol wrote:
> On Oct 25, 2016 at 19:14, Sebastian via Bristol wrote:
>>> Also, it's probably worth mentioning our IRC channel on the Facebook
>>> group/description as this is where most of the chat seems to happen
>>> (albeit predominantly SCART based).
>> I think if we are going to do IRC seriously, that should have a
>> channel on Freenode. Freenode is where it's mostly at for tech IRC
>> channels, I rarely go on any other networks in general.
> Indeed, same here. It seems that #bblug is free on freenode. I'm the
> only one in it. Join me ;)
>
I'll say again - we have an existing, well established IRC channel.
There seems little point in splitting the already small active LUG
membership between different networks.
Steve
------------------------------
Message: 2
Date: Wed, 26 Oct 2016 23:44:34 +0100
From: Steve Netting <steve@track3.org.uk>
To: bristol@mailman.lug.org.uk
Subject: Re: [bristol] Capacitive switch test
Message-ID: <cec99823-5169-6e4d-5df9-2cb24e830c68@netting.org.uk>
Content-Type: text/plain; charset=utf-8
On 26/10/16 20:07, Andrew via Bristol wrote:
> Hi
>
> I have a capacitive switch I want to test. I have googled a fair bit but
> cannot find a simple answer. Will simply earthing the feed wire to the
> switch do the trick? (I have a harman kardon base unit not working, and
> the volume switches on the satellite are suspect.) Apologies not linux
> of course but I figure this is a super simple question for the cognoscenti.
>
Hi Andrew,
I'm not exactly sure what you're asking. Earthing the feed wire to the
switch?
Steve
------------------------------
Message: 3
Date: Thu, 27 Oct 2016 00:49:49 +0100
From: Samir Benmendil <me@rmz.io>
To: Steve Netting <steve@track3.org.uk>, Bristol and Bath Linux User
Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Events! LPD, FOSDEM, etc.
Message-ID: <20161026234949.GE1832@chronos.localdomain>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
On Oct 26, 2016 at 23:32, Steve Netting via Bristol wrote:
> On 26/10/16 21:56, Samir Benmendil via Bristol wrote:
>> On Oct 25, 2016 at 19:14, Sebastian via Bristol wrote:
>>>> Also, it's probably worth mentioning our IRC channel on the Facebook
>>>> group/description as this is where most of the chat seems to happen
>>>> (albeit predominantly SCART based).
>>> I think if we are going to do IRC seriously, that should have a
>>> channel on Freenode. Freenode is where it's mostly at for tech IRC
>>> channels, I rarely go on any other networks in general.
>> Indeed, same here. It seems that #bblug is free on freenode. I'm the
>> only one in it. Join me ;)
> I'll say again - we have an existing, well established IRC channel.
>
> There seems little point in splitting the already small active LUG
> membership between different networks.
True, I kinda just went ahead with the freenode IRC without reading the
rest of the ml thread.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 801 bytes
Desc: not available
URL: <https://mailman.lug.org.uk/mailman/private/bristol/attachments/20161027/04f20fa9/attachment.sig>
------------------------------
Message: 4
Date: Thu, 27 Oct 2016 08:34:47 +0100
From: Amias Channer <me@amias.net>
To: Bristol and Bath Group <bristol@mailman.lug.org.uk>, Andrew
<andrewsoltau@gmail.com>, andrew@1dtv.com
Subject: Re: [bristol] Capacitive switch test
Message-ID:
<CAMgU7XWVwo7HSAiqh6WF9hjt2tbVjGNz=E9BrvvV17mEmFeyQw@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello Andrew,
Bristol backspace might be more on topic for this , you could try there if
you don't get what you need here.
Cheers
Amias
On 26 Oct 2016 20:07, "Andrew via Bristol" <bristol@mailman.lug.org.uk>
wrote:
> Hi
>
> I have a capacitive switch I want to test. I have googled a fair bit but
> cannot find a simple answer. Will simply earthing the feed wire to the
> switch do the trick? (I have a harman kardon base unit not working, and the
> volume switches on the satellite are suspect.) Apologies not linux of
> course but I figure this is a super simple question for the cognoscenti.
>
> Andrew
>
>
>
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/bristol
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.lug.org.uk/mailman/private/bristol/attachments/20161027/997a93c4/attachment-0001.html>
------------------------------
Message: 5
Date: Thu, 27 Oct 2016 10:40:27 +0100
From: Andrew <andrewsoltau@gmail.com>
To: Steve Netting <steve@track3.org.uk>, Bristol and Bath Linux User
Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Capacitive switch test
Message-ID: <b249f27a-71a2-b25a-f631-9e939f653725@1dtv.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 26/10/16 23:44, Steve Netting via Bristol wrote:
> On 26/10/16 20:07, Andrew via Bristol wrote:
>> Hi
>>
>> I have a capacitive switch I want to test. I have googled a fair bit but
>> cannot find a simple answer. Will simply earthing the feed wire to the
>> switch do the trick? (I have a harman kardon base unit not working, and
>> the volume switches on the satellite are suspect.) Apologies not linux
>> of course but I figure this is a super simple question for the cognoscenti.
>>
> Hi Andrew,
>
> I'm not exactly sure what you're asking. Earthing the feed wire to the
> switch?
>
>
> Steve
>
> ____________________________________________
Hi Steve.
Little capacitive switch on the front of a pc speaker to raise or lower
volume. Seems to be dead. Single connection on the back. My question is
whether just earthing the connection would tell the unit the same as
touching the switch would. (If I am not using the right language that
probably explains why my googling is getting nowhere.)
Andrew
------------------------------
Message: 6
Date: Thu, 27 Oct 2016 11:26:10 +0100
From: Steve Netting <steve@track3.org.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Capacitive switch test
Message-ID: <29fad7cc-8b85-9243-5f7e-e8528d0af833@netting.org.uk>
Content-Type: text/plain; charset=utf-8
On 27/10/16 10:40, Andrew wrote:
> On 26/10/16 23:44, Steve Netting via Bristol wrote:
>> On 26/10/16 20:07, Andrew via Bristol wrote:
>>> Hi
>>>
>>> I have a capacitive switch I want to test. I have googled a fair bit but
>>> cannot find a simple answer. Will simply earthing the feed wire to the
>>> switch do the trick? (I have a harman kardon base unit not working, and
>>> the volume switches on the satellite are suspect.) Apologies not linux
>>> of course but I figure this is a super simple question for the
>>> cognoscenti.
>>>
>> Hi Andrew,
>>
>> I'm not exactly sure what you're asking. Earthing the feed wire to the
>> switch?
>>
>>
>> Steve
>>
>> ____________________________________________
> Hi Steve.
>
> Little capacitive switch on the front of a pc speaker to raise or lower
> volume. Seems to be dead. Single connection on the back. My question is
> whether just earthing the connection would tell the unit the same as
> touching the switch would. (If I am not using the right language that
> probably explains why my googling is getting nowhere.)
>
I can't imagine how it works with only a single wire, unless the switch
is also grounded via a metal case perhaps? There's probably a few ways
it could operate but I believe a common method is to use an oscillator
and check for added capacitance by timing the rise/fall time of the
forward/trailing edge.
Assuming it has a ground (even if via the case) and it's doing something
similar to the above - I'd guess a small value ceramic capacitor between
the wire and ground would be sufficient.
This is purely guesswork though :)
Steve
------------------------------
Message: 7
Date: Thu, 27 Oct 2016 11:42:21 +0100
From: Steve Netting <steve@track3.org.uk>
To: Bristol and Bath Linux User Group <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Capacitive switch test
Message-ID: <fef1d412-4bb5-208a-91df-06e0bae319ad@coherer.net>
Content-Type: text/plain; charset=utf-8
<snip>
> Hi Steve.
>
> Little capacitive switch on the front of a pc speaker to raise or lower
> volume. Seems to be dead. Single connection on the back. My question is
> whether just earthing the connection would tell the unit the same as
> touching the switch would. (If I am not using the right language that
> probably explains why my googling is getting nowhere.)
>
Just found this - using capacitance to adjust the frequency of an RC
circuit:-
http://pcbheaven.com/wikipages/How_a_Touch_Button_works/?p=1
I still tend to think of the capacitance (from touch) appearing as a
value between two points on the touch switch (or between switch and
case/ground).
But regardless, my suggestion to add a small capacitor between 'the
wire' and ground would likely work in either edge timing or frequency
detection methods.
Interesting article here:-
https://en.wikipedia.org/wiki/Body_capacitance
:)
Steve
------------------------------
Subject: Digest Footer
_______________________________________________
Bristol mailing list
Bristol@mailman.lug.org.uk
https://mailman.lug.org.uk/mailman/listinfo/bristol
------------------------------
End of Bristol Digest, Vol 667, Issue 5
***************************************
Tidak ada komentar:
Posting Komentar