Re: Alternative on Dash Clock Conversions
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Re: Alternative on Dash Clock Conversions
- From: Herb <zephyr9900@xxxxxxxxxxx>
- Date: Sat, 31 Jan 2009 12:16:47 -0600 (Centra
The clock is not creating the heat the resistor reducing 12v to 1.5v is the
culprit. For example building the circuit to run the gauges needs a heat
sink for the resistor going from12v to 5v and it runs Hot. The bottom line,
resistance = heat. I would almost guess the extra heat generated dropping
to1.5v would cause damage to the dash if the heat sink was mounted on it.
With that big of drop you might look at mounting the heat sink to the fire
wall or something not affected by heat under the dash. Just my II.
Herb
St. Louis, MO.
-------Original Message-------
From: Dodger7998@xxxxxxx
Date: 01/31/09 10:51:13
To: 1962to1965mopars@xxxxxxxxxx
Subject: Re: Alternative on Dash Clock Conversions
really stretching my memory here, but would think that the value of the
resistor would be 7 times the resistance of the clock, and that there
combined
resistance would make the 8, and as far as the heat,,,,,I can not believe
that
the power used by a clock would cause any amount of heat, surely there is
some one on the list that has been to school since I have that could
clarify
this
In a message dated 1/31/2009 10:15:39 A.M. Central Standard Time,
pjlenn@xxxxxxxxx writes:
That's what I was trying to get to with the father-in-law. How do you
calculate the value of the resistor needed? But I couldn't quite get
him to give me a straight answer. So I looked around a little in some
of my old stuff and found a slide type Ohm's Law calculator. It will
give me the value of the resistor if I know the voltage (12) and how
many milliamperes the clock will draw. So, would you then multiply the
value it gives you for the resistor x's 8 as discussed in the previous
post? I don't know. Probably just easier to grab a handful of
resistors and a voltmeter and experiment a little. If you used a higher
wattage resistor it might take care of the heat issue. A heat sink
would probably make everything last longer.
Paul L.
'63 Sport Fury
440/727
http://www.1962to1965mopar.ornocar.org/ml-lennemann63.html
Dodger7998@xxxxxxx wrote:
>
>
> It has been a long time since I worked with modern electronics,,,,,(tube
>
> type portable radios in junior high) but I would think that all you
> would have
> to do is put a resistor in line with the clock to reduce the voltage
>
>
> In a message dated 1/30/2009 7:59:26 P.M. Central Standard Time,
> pjlenn@xxxxxxxxx writes:
>
>
> I tried to get a straight answer on this question out of my
> father-in-law who has a Phd. in Physics but I didn't quite get there.
> What I was able to come up with though was the thought that you could
> go
> to Radio Shack and get a solid state voltage regulator. This should be
>
> very inexpensive. You could get one that would either knock the
> voltage
> down from 12v - 1.5v or one that would go from 5v - 1.5v tapping into
> the voltage supply coming out of the instrument voltage regulator.
> What
> I did get out of the father-in-law was that you just figure it as a
> straight ratio. 12/1.5 = 8 so you would get a voltage regulator that
> would reduce the voltage by a factor of 8. Or 5/1.5= 3.33 Does this
> help?
>
> Paul L.
> '63 Sport Fury
> 440/727
> http://www.1962to1965mopar.ornocar.org/ml-lennemann63.html
>
> Jeff Adams wrote:
> >
> > The parts at Radio Shack are dirt cheap. When I converted my dash
> > cluster regulator I had $16 in everything, including 3 rolls of wire.
> > Dodger7998@xxxxxxx wrote:
> > >
> > >
> > > yes it could be done,,,,,,,guess that I am marching to a different
> > > drum
> > >
> > > thou
> > > gh, having a working clock in my 62-65 is of little importance to
me,
> > > and
> > > would much rather spend that monies toward something else that would
be
> > >
> > > more
> > > noticeable to the general public, or towards performance, however if
you
> > >
>
> > >
> > > have
> > > unlimited funds to spend on the car ,,,,,,,, go for it
> > >
> > >
> > > In a message dated 1/30/2009 9:08:25 A.M. Central Standard Time,
> > > ledman_70@xxxxxxxxxxx writes:
> > >
> > >
> > > I've thought about this before, but since we have been able to use
a
> > > small Radio Shack voltage regulator to replace the regualtor in
our
> > > gauge clusters, why can't we just wire a small regulator/resistor
into
> > >
> > > a
> > > battery operated clock??? They just run on one 1.5 volt battery.
Does
> > > this sound feasible to anyone?
> > >
> > > spigot2039@xxxxxxxxxxx wrote:
> > > >
> > > > Some years back it was reported here by a member that he went to
a
> > > > craft
> > > > shop and bought craft-oriented clock guts, the kind that uses one
AA
> > > > battery. He retrofitted that mechanism into his Mopar's clock
and
it
> > > > worked. The only maintenance was replacing the AA battery once a
year.
> > > >
> > > > Gary H.
> > >
> > >
> > >
> > > Jeff Adams
> > > 64 Polara
> > >
> > >
> > > ----
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topic.
> > >
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> > >
> > > '62 to '65 Mopar Clubhouse Discussion Guidelines:
> > > http://www.1962to1965mopar.ornocar.org/mletiq.html.
> > >
> > >
> > >
> > > **************A Good Credit Score is 700 or Above. See yours in just
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> > >
> > > cemailfooterNO62)
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> >
> >
> >
> > Jeff Adams
> > 64 Polara
>
>
> ----
> Please address private mail -- mail of interest to only one person --
> directly to that person. I.e., send parts/car transactions and
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> well as other personal messages only to the intended recipient, not to
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> Clubhouse public address. This practice will protect your privacy,
> reduce the
> total volume of mail and fine tune the content signal to Mopar topic.
> Thanks!
>
> '62 to '65 Mopar Clubhouse Discussion Guidelines:
> http://www.1962to1965mopar.ornocar.org/mletiq.html.
>
>
>
> **************A Good Credit Score is 700 or Above. See yours in just 2
> easy
> steps!
>
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> [Non-text portions of this message have been removed]
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----
Please address private mail -- mail of interest to only one person --
directly to that person. I.e., send parts/car transactions and
negotiations as
well as other personal messages only to the intended recipient, not to the
Clubhouse public address. This practice will protect your privacy, reduce
the
total volume of mail and fine tune the content signal to Mopar topic.
Thanks!
'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.
**************A Good Credit Score is 700 or Above. See yours in just 2 easy
steps!
(http://pr.atwola
com/promoclk/100000075x1215855013x1201028747/aol?redir=http://www
freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=62%26bcd=De
cemailfooterNO62)
[Non-text portions of this message have been removed]
----
Please address private mail -- mail of interest to only one person --
directly to that person. I.e., send parts/car transactions and negotiations
as well as other personal messages only to the intended recipient, not to
the Clubhouse public address. This practice will protect your privacy,
reduce the total volume of mail and fine tune the content signal to Mopar
topic. Thanks!
'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.
[Non-text portions of this message have been removed]
----
Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!
'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.
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