Today's Message Index:
----------------------
0. 12:46 PM - Reminder (Matt Dralle)
1. 08:43 AM - Re: Over Voltage Crowbar (Eric Page)
2. 10:44 AM - Re: Over Voltage Crowbar (dj_theis)
3. 10:51 AM - Re: Over Voltage Crowbar (dj_theis)
4. 11:27 AM - Re: Make Sure You're Listed! List of Contributors Coming Soon! (Bill Lamb)
5. 09:17 PM - Even though the Browns have a solid defense (Skyzhay)
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Dear Listers,
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Message 1
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| Subject: | Re: Over Voltage Crowbar |
user9253 wrote:
> Eric, post 1 explains that R5 is optional to eliminate the pot.
Yep, I saw that, but it doesn't explain four resistors on the board. Perhaps single
E96 resistors didn't offer the exact values needed, but end-of-range precision
isn't important and you'd end up with a tolerance stack anyway.
I guess it doesn't really matter; I was just curious about it.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=504588#504588
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| Subject: | Re: Over Voltage Crowbar |
> Looking at the 3D rendering image that you posted, I would be worried about the
board layout. If the trace under the "R2" and "D1" markings is the only copper
carrying trip current to the SCR, and if it's as narrow as it appears, then
I'm concerned that the trace may burn open before it can blow the fuse. Blowing
a typical fuse in a reasonably short time takes significantly more than its
rated current
Thanks for the observation Eric. A good question and I'll ask about it.
Yes, I had planned to test the board extensively (with a battery driven circuit)
when they arrive.
With regard to the resistors, no doubt that addiing the components seems rather
arbitrary to me as well, particularly R5. The pot + R1 was a convienience related
to resistor sizing and availablility.
--------
Dan Theis
Scratch building Sonex #1362
Still working on the Revmaster Alternator improvement
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=504592#504592
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| Subject: | Re: Over Voltage Crowbar |
> If nuisance tripping occurs, a capacitor (s) connected between U1 Pin 1 (FB1)
and ground might help
Thanks Joe,
I meant to include the data sheet for U1 in my original post and on page 10 (I
believe) they define modifying C1 to achieve a debounce desired.
https://www.analog.com/media/en/technical-documentation/data-sheets/1696fb.pdf
I think the existing selection provides a time delay of 10 to 11 usec, depending
on the voltage sensed. Yes, I think you are correct that this might be a bit
too "twitchy." Using the added cap as you suggest is certainly an easy way
to modify the behavior without component replacement. Something that might be
necessary for any specific aplication.
--------
Dan Theis
Scratch building Sonex #1362
Still working on the Revmaster Alternator improvement
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=504593#504593
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| Subject: | Make Sure You're Listed! List of Contributors |
Coming Soon!
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| Subject: | Even though the Browns have a solid defense |
The issue could be Mut 22 coins (https://www.mmoexp.com/Nfl-22/Coins.html) self-inflicted, as Next Gen Stats show Wilson and Fields in particular are holding the ball too long in the NFL, as per NFL Media's Daniel Jeremiah.
This is partly due to issues with personnel and issue with the system. Matt Nagy,
the Bears' starter, asked Fields to play the role of "Dude who Backs Andy Dalton"
rather than "Insanely Athletic First-Round Selector Playing behind Bad
Offensive Line." The decision to use Fields was to make life easier for Fields.
Take the pocket and move it. Get him out on the edge. Cut the field in half.
You can run a number of RPO's to shift the odds in your favor with an offensive
line that is questionable.
Even though the Browns have a solid defense, the offensive coach permitted a new
quarterback to record 6-for-20. This resulted in 47 net yards on 42 plays (1.1
per player). and one net passing yard. It's not a typo: The Bears only had
one passing yard. In 2021. A full football match. The field was populated by 11
players. Fields was punched nine times. Nine times? Nine times. Mr. Nagy, wake
up and get a cup of coffee.
It's possible they're not that bad, as they are at the very least hiring an experienced
coach to oversee the roster that has limited talent. This is in contrast
to an older coaching staff with no talent like the Bears. They're sucking
the energy out of their fans with a listless performance, however.
Wilson's first season is cause to be concerned. Wilson was to be the guy to watch
for the whole season. This was made possible by trading Sam Darnold. Wilson
is being pressured all the time because Mekhi Becton has been absent. The run
game is yet to be seen and will not occur until the Jets play a more favorable
defensive matchup.
In Week 3 Mac Jones buy mut coins madden 22 (https://www.mmoexp.com/Nfl-22/Coins.html) played his most difficult game of the season, throwing a trio so badly that it caused only a few groans from his head coach.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=504682#504682
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