AeroElectric-List Digest Tue 09/26/23

AeroElectric-List Digest Archive

Tue 09/26/23

Total Messages Posted: 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


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Time: 07:57:30 AM PST US
Subject: 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


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Time: 10:32:05 AM PST US
From: M Wilson <mike_tailwind@yahoo.com>
Subject: 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


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Time: 02:41:34 PM PST US
Subject: 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


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Time: 04:48:52 PM PST US
Subject: 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


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Time: 05:00:36 PM PST US
Subject: 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


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Time: 06:38:23 PM PST US
Subject: 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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