----------------------------------------------------------
                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Tue 09/26/23: 6
           ----------------------------------------------------------
 
 
Today's Message Index:
----------------------
 
     1. 07:57 AM - Re: OVM14 MkIII, rev P1  (user9253)
     2. 10:32 AM - Re: Re: OVM14 MkIII, rev P1  (M Wilson)
     3. 02:41 PM - Re: OVM14 MkIII, rev P1  (user9253)
     4. 04:48 PM - Re: OVM14 MkIII, rev P1  (Eric Page)
     5. 05:00 PM - Re: OVM14 MkIII, rev P1  (user9253)
     6. 06:38 PM - Re: OVM14 MkIII, rev P1  (user9253)
 
 
 
________________________________  Message 1  _____________________________________


Time: 07:57:30 AM PST US
Subject: AeroElectric-List: Re: OVM14 MkIII, rev P1
From: "user9253" <fransew@gmail.com>


At first, Mike_Tailwind's comment, "the LED will light and it's current will 
keep the SCR tripped - latching" seemed like a good idea.  But what happens 
when the pilot resets the circuit breaker?  Won't it just trip again since the

SCR is still conducting?

--------
Joe Gores


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=511509#511509


________________________________  Message 2  _____________________________________


Time: 10:32:05 AM PST US
From: M Wilson <mike_tailwind@yahoo.com>
Subject: Re: AeroElectric-List: Re: OVM14 MkIII, rev P1

 Yep, you would have to cycle master power first.
    On Tuesday, September 26, 2023 at 10:09:42 AM CDT, user9253 <fransew@gm
ail.com> wrote:  


At first, Mike_Tailwind's comment, "the LED will light and it's current wil
l 
keep the SCR tripped - latching" seemed like a good idea.=C2- But what ha
ppens 
when the pilot resets the circuit breaker?=C2- Won't it just trip again s
ince the 
SCR is still conducting?

--------
Joe Gores


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=511509#511509


 -
S -
WIKI -
 -
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.


________________________________  Message 3  _____________________________________


Time: 02:41:34 PM PST US
Subject: AeroElectric-List: Re: OVM14 MkIII, rev P1
From: "user9253" <fransew@gmail.com>


How about using a second SCR for an over-voltage tripped light?  Maybe 
something like the attached circuit.  Keep in mind that I am not an electronic

engineer.  I don't even play one of TV.  :-)

--------
Joe Gores


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=511512#511512


Attachments: 

http://forums.matronics.com//files/ov_indicator_light__424.png


________________________________  Message 4  _____________________________________


Time: 04:48:52 PM PST US
Subject: AeroElectric-List: Re: OVM14 MkIII, rev P1
From: "Eric Page" <edpav8r@yahoo.com>



user9253 wrote:
> How about using a second SCR for an over-voltage tripped light?  Maybe something
like the attached circuit.

See edits... [Wink]


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=511513#511513


Attachments: 

http://forums.matronics.com//files/ov_indicator_light_edit_921.png


________________________________  Message 5  _____________________________________


Time: 05:00:36 PM PST US
Subject: AeroElectric-List: Re: OVM14 MkIII, rev P1
From: "user9253" <fransew@gmail.com>


I thought about that at first Eric, but it only takes 50 microamps to turn on the
BT169D SCR.  
I was concerned that much current would come via R12.

--------
Joe Gores


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=511514#511514


________________________________  Message 6  _____________________________________


Time: 06:38:23 PM PST US
Subject: AeroElectric-List: Re: OVM14 MkIII, rev P1
From: "user9253" <fransew@gmail.com>


I fixed the LED polarity.  I kept the schematic simple by not drawing the test

circuit, but I think it is a good idea and should be included.

--------
Joe Gores


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=511515#511515


 

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