| A Question for DigiPanel Experts [message #317884] |
Mon, 22 May 2017 23:19  |
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SteveW
Messages: 538
Registered: June 2005
Location: Southern California - Ora...
Karma: 1
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Greetings and THANKS in advance for all of the information shared here...
I've recently come upon an old DigiPanel. I hooked it up and it works - well - Battery and Oil Pressure at least. I haven't run the sensor down to the transmission pan yet, and the sensor for the thermostat housing was cut off. I got a replacement from JimK but haven't spliced it in yet.
But it got me to wondering... what's so magic about the sensors ?? Two wires terminating at a small piece of copper to be secured under a bolt head. Is is some sort of bi-metal ?? Is it just a regular old Type K thermocouple ?? Anybody know ??
Steve W
1973 23'
Southern California
Steve W
1973 : 23'
Southern California
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| Re: A Question for DigiPanel Experts [message #317900 is a reply to message #317884] |
Tue, 23 May 2017 07:57  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Twist and solder and heat shrink. The 'goo' is a glue which keeps water out if you obtain glued shrink. It isn't an 'active' sensor, there's no power lead. Plus, the accuracy needed in this circumstance is easily met by a thermistor which is the least expensive way to do it. You'd need a look at the schematic top confirm the exact setup, and the maker may consider it confidential. I'm too lazy to draw one of mine but at a glance it looks fairly standard logic, amps, and display drivers.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] A Question for DigiPanel Experts [message #317903 is a reply to message #317900] |
Tue, 23 May 2017 08:23 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Read here
http://gmcmotorhome.info/chassis.html#digi
On Tue, May 23, 2017 at 5:58 AM Johnny Bridges via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Twist and solder and heat shrink. The 'goo' is a glue which keeps water
> out if you obtain glued shrink. It isn't an 'active' sensor, there's no
> power lead. Plus, the accuracy needed in this circumstance is easily met
> by a thermistor which is the least expensive way to do it. You'd need a
> look
> at the schematic top confirm the exact setup, and the maker may consider
> it confidential. I'm too lazy to draw one of mine but at a glance it looks
> fairly standard logic, amps, and display drivers.
>
> --johnny
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: A Question for DigiPanel Experts [message #317925 is a reply to message #317884] |
Tue, 23 May 2017 15:03 |
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RF_Burns
Messages: 2276
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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That's where I saw it, on Gen's site. If you look at the bottom of Gene's page you will see it and if you enlarge and squint right, its a Motorola MTS102. Looking up the data sheet, its basically a transistor with the base connected to the collector. The forward voltage drop through the Base-Emitter PN junction varies with temperature. I'm sure since they have sold off just about every division, Motorola doesn't make these anymore, but someone else likely does.
http://gmcmotorhome.info/chassis.html#digi
Datasheet
http://www.datasheetlib.com/datasheet/984565/mts102_motorola-semiconductor.html
Some application data
http://www.ti.com/lit/an/sboa019/sboa019.pdf
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: A Question for DigiPanel Experts [message #317927 is a reply to message #317884] |
Tue, 23 May 2017 15:34 |
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SteveW
Messages: 538
Registered: June 2005
Location: Southern California - Ora...
Karma: 1
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Senior Member |
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P.e.r.f.e.c.t.
Thank you Rob, Matt, Johnny, Gene, Bruce, and the PM responders.
What a wonderful place we have here.
Steve W
1973 23'
Southern California
Steve W
1973 : 23'
Southern California
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