--===============7049432220209174639==
Content-Transfer-Encoding: 7bit
--Apple-Mail-091E4AB0-2200-4ACD-A554-8D47614A9100
charset=utf-8
Content-Transfer-Encoding: quoted-printable
Excellent circuit protection!
In automotive applications I don=E2=80=99t think there is TOO much protectio=
n. =20
So far the LM2940=E2=80=99s own protection has been sufficient. But the car=
does not do very many miles each year. So it may simply be too soon to kno=
w=20
-Tony
>=20
> On Jun 1, 2022, at 4:18 PM, DAVID MASSEY <dave1massey@cs.com> wrote:
>=20
> =EF=BB=BF
> I go way beyond that. First I use a 1N4004 to protect against negative-go=
ing spikes (which car be as high as -80 volts), then I place a 15V Zener or T=
VS to clamp any positive-going pulses (which can be as high as 120V). Depen=
ding on the application I also include a low value resistor or polyfuse to l=
imit the current the TVS needs to sink. Then there is the input filter as y=
ou pointed out.
>=20
> This may be a bit of overkill but without the ability to test for optimum a=
nd considering I'm only going to build a few (or one) of these things a litt=
le overkill is cheap insurance.
>=20
> Dave=20
>=20
>=20
>=20
>=20
> -----Original Message-----
> From: Anthony Rhodes <spamiam@comcast.net>
> To: triumphs@autox.team.net
> Cc: billbrewer59@yahoo.com
> Sent: Wed, Jun 1, 2022 1:40 pm
> Subject: Re: [TR] TR4/6 Voltage Stabilizer
>=20
> I built my own voltage stabilizer.
>=20
> At the time, Moss had one that used a diode and a transistor as a form of a=
crude shunt regulator.
>=20
> I used a LM2940=E2=80=9310 automotive low dropout 10 V analog regulator.
>=20
> Sense and I have seen photographs of the guts of the newer electronic regu=
lators. It appears they use a single voltage regulator with no other compone=
nts around it.
>=20
> As I recall, These used a through hole TO 220 device with the legs bent o=
ver 90 degrees and no heat sinking.
>=20
> Not ideal
>=20
> All these analog regulators need proper capacitors on the input in output s=
ide of the regulator.
>=20
> My regulator with the LM 2940=E2=80=9310 has been in use since probably ab=
out 2004 with no problems in a TR4A
>=20
> I can give further details, schematics, etc. to people if they are interes=
ted.
>=20
> -Tony
>=20
> >=20
> > On Jun 1, 2022, at 2:01 PM, triumphs-request@autox.team.net wrote:
> >=20
> > Message: 1
> > Date: Tue, 31 May 2022 19:12:36 -0700
> > From: William Brewer <billbrewer59@yahoo.com>
> > To: Triumph List <triumphs@autox.team.net>
> > Subject: [TR] TR4/6 Voltage Stabilizer
> > Message-ID: <4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@yahoo.com>
> > Content-Type: text/plain; charset=3D"utf-8"; Format=3D"flowed"
> >=20
> > ???? I have a TR4 temperature gauge in my TR3. The Moss gauge voltage=20=
> > stabilizer only lasted a few thousand miles and the quit outputting the=20=
> > 10 volts. Anybody else having short lifespans on their voltage=20
> > stabilizers? Are there better ones out there? Moss makes a big deal=20
> > about "Modern electronics in a vintage style housing". Screw the vintage=
=20
> > style housing, I want dependability. Is there an aftermarket one that=20=
> > has a long life?
>=20
> ** triumphs@autox.team.net **
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dave1ma=
ssey@cs.com
--Apple-Mail-091E4AB0-2200-4ACD-A554-8D47614A9100
charset=utf-8
Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Excellent circuit protection!<div><br></div=
><div>In automotive applications I don=E2=80=99t think there is TOO much pro=
tection. </div><div><br></div><div>So far the LM2940=E2=80=99s o=
wn protection has been sufficient. But the car does not do very many m=
iles each year. So it may simply be too soon to know </div><div><=
br></div><div>-Tony</div><div><br><div dir=3D"ltr"><blockquote type=3D"cite"=
><br>On Jun 1, 2022, at 4:18 PM, DAVID MASSEY <dave1massey@cs.com> wro=
te:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=
=BB=BF
<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">I go way beyond that. First I use a 1N4004 to p=
rotect against negative-going spikes (which car be as high as -80 volts), th=
en I place a 15V Zener or TVS to clamp any positive-going pulses (which can b=
e as high as 120V). Depending on the application I also include a low v=
alue resistor or polyfuse to limit the current the TVS needs to sink. T=
hen there is the input filter as you pointed out.</font></div>
<div><br>
</div>
<div><font size=3D"3">This may be a bit of overkill but without the ability t=
o test for optimum and considering I'm only going to build a few (or one) of=
these things a little overkill is cheap insurance.</font><br>
</div>
<div> <br>
</div>
<div style=3D"clear:both">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div><font size=3D"4">Dave <br>
</font></div>
<div><font size=3D"3"><span style=3D"font-size: 10pt; color: black;"><br>
</span></font></div>
<br>
</div>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font s=
ize=3D"2">-----Original Message-----<br>
From: Anthony Rhodes <spamiam@comcast.net><br>
To: triumphs@autox.team.net<br>
Cc: billbrewer59@yahoo.com<br>
Sent: Wed, Jun 1, 2022 1:40 pm<br>
Subject: Re: [TR] TR4/6 Voltage Stabilizer<br>
<br>
<div dir=3D"ltr">I built my own voltage stabilizer.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">At the time, Moss had one that used a diode and a transisto=
r as a form of a crude shunt regulator.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">I used a LM2940=E2=80=9310 automotive low dropout 10 V anal=
og regulator.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">Sense and I have seen photographs of the guts of the newer e=
lectronic regulators. It appears they use a single voltage regulator with no=
other components around it.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">As I recall, These used a through hole TO 220 device w=
ith the legs bent over 90 degrees and no heat sinking.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">Not ideal<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">All these analog regulators need proper capacitors on the i=
nput in output side of the regulator.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">My regulator with the LM 2940=E2=80=9310 has been in use si=
nce probably about 2004 with no problems in a TR4A<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">I can give further details, schematics, etc. to people if t=
hey are interested.<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">-Tony<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">> <br>
</div>
<div dir=3D"ltr">> On Jun 1, 2022, at 2:01 PM, <a ymailto=3D"mailto:trium=
phs-request@autox.team.net" href=3D"mailto:triumphs-request@autox.team.net";>=
triumphs-request@autox.team.net</a> wrote:<br>
</div>
<div dir=3D"ltr">> <br>
</div>
<div dir=3D"ltr">> Message: 1<br>
</div>
<div dir=3D"ltr">> Date: Tue, 31 May 2022 19:12:36 -0700<br>
</div>
<div dir=3D"ltr">> From: William Brewer <<a ymailto=3D"mailto:billbrew=
er59@yahoo.com" href=3D"mailto:billbrewer59@yahoo.com";>billbrewer59@yahoo.co=
m</a>><br>
</div>
<div dir=3D"ltr">> To: Triumph List <<a ymailto=3D"mailto:triumphs@aut=
ox.team.net" href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net=
</a>><br>
</div>
<div dir=3D"ltr">> Subject: [TR] TR4/6 Voltage Stabilizer<br>
</div>
<div dir=3D"ltr">> Message-ID: <<a ymailto=3D"mailto:4b9c278c-ffbf-4d7=
0-5f30-9e75ceb2468c@yahoo.com" href=3D"mailto:4b9c278c-ffbf-4d70-5f30-9e75ce=
b2468c@yahoo.com">4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@yahoo.com</a>><br>=
</div>
<div dir=3D"ltr">> Content-Type: text/plain; charset=3D"utf-8"; Format=3D=
"flowed"<br>
</div>
<div dir=3D"ltr">> <br>
</div>
<div dir=3D"ltr">> ???? I have a TR4 temperature gauge in my TR3. The Mos=
s gauge voltage <br>
</div>
<div dir=3D"ltr">> stabilizer only lasted a few thousand miles and the qu=
it outputting the <br>
</div>
<div dir=3D"ltr">> 10 volts. Anybody else having short lifespans on their=
voltage <br>
</div>
<div dir=3D"ltr">> stabilizers? Are there better ones out there? Moss mak=
es a big deal <br>
</div>
<div dir=3D"ltr">> about "Modern electronics in a vintage style housing".=
Screw the vintage <br>
</div>
<div dir=3D"ltr">> style housing, I want dependability. Is there an after=
market one that <br>
</div>
<div dir=3D"ltr">> has a long life?<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">** <a ymailto=3D"mailto:triumphs@autox.team.net"; href=3D"ma=
ilto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">Donate: <a href=3D"http://www.team.net/donate.html"; target=3D=
"_blank">http://www.team.net/donate.html</a><br>
</div>
<div dir=3D"ltr">Archive: <a href=3D"http://www.team.net/pipermail/triumphs"=
target=3D"_blank">http://www.team.net/pipermail/triumphs </a> <a href=3D"ht=
tp://www.team.net/archive" target=3D"_blank">http://www.team.net/archive</a>=
<br>
</div>
<div dir=3D"ltr"><br>
</div>
<div dir=3D"ltr">Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailma=
n/options/triumphs/dave1massey@cs.com" target=3D"_blank">http://autox.team.n=
et/mailman/options/triumphs/dave1massey@cs.com</a><br>
</div>
</font></div>
</div>
</div></blockquote></div></body></html>=
--Apple-Mail-091E4AB0-2200-4ACD-A554-8D47614A9100--
--===============7049432220209174639==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
--===============7049432220209174639==--
|