---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 10/12/17: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:46 AM - Re: Constructing an automatic RCA video camera feed splitter (Airdog77) 2. 12:48 AM - Re: Constructing an automatic RCA video camera feed splitter (Airdog77) 3. 01:03 AM - Re: Constructing an automatic RCA video camera feed splitter (Airdog77) 4. 04:22 AM - Re: Re: Constructing an automatic RCA video camera feed splitter (Robert L. Nuckolls, III) 5. 08:54 AM - Re: Dual Power Inputs, Dual Buss Electrical System (Bill Watson) 6. 09:16 AM - Re: Constructing an automatic RCA video camera feed splitter (Airdog77) 7. 09:24 AM - Re: Re: Constructing an automatic RCA video camera feed splitter () 8. 09:30 AM - Re: Constructing an automatic RCA video camera feed splitter (Airdog77) 9. 11:19 AM - Re: Re: Constructing an automatic RCA video camera feed splitter (Charlie England) 10. 11:46 AM - Re: Dual Power Inputs, Dual Buss Electrical System (Robert L. Nuckolls, III) 11. 11:49 AM - Re: Re: Constructing an automatic RCA video camera feed splitter (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:46:39 AM PST US Subject: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter From: "Airdog77" Thanks Bob. I'll take a look at all this and try to digest! :) I see a number of responses to my question that I need to go through as well.... normally I get an email update on a post, but didn't this time so I have some reading to do! Regards, Wade -------- Airdog Wade Parton Building Long-EZ 916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473489#473489 ________________________________ Message 2 _____________________________________ Time: 12:48:28 AM PST US Subject: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter From: "Airdog77" Awesome, looks great! -------- Airdog Wade Parton Building Long-EZ 916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473490#473490 ________________________________ Message 3 _____________________________________ Time: 01:03:57 AM PST US Subject: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter From: "Airdog77" Sorry for my delayed response back. Again, didn't get any of the normal email notifications that responses were being made to my question... thanks all! The camera I'm using is a cheap 1/4" 600TVL from Amazon... the two I bought are no longer being sold, but this is close: https://tinyurl.com/yckqk3dh Yes, I'm looking at video RCA jack OUT feed that will then go into box that hooks to USB. So I don't need to mess with anything USB as far as video is concerned. I need to dig into all this info to figure out a way ahead. Bob, how would I go about getting boards like the one you posted pics of? Regards, Wade -------- Airdog Wade Parton Building Long-EZ 916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473491#473491 ________________________________ Message 4 _____________________________________ Time: 04:22:16 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter At 03:03 AM 10/12/2017, you wrote: > >Sorry for my delayed response back. Again, didn't get any of the >normal email notifications that responses were being made to my >question... thanks all! > >The camera I'm using is a cheap 1/4" 600TVL from Amazon... the two I >bought are no longer being sold, but this is close: >https://tinyurl.com/yckqk3dh There's quite an array of products offered in these devices. I read some comments that complained of poor/no instructions. Also, some devices advertised as 3-12v supply were indeed 3.3 volts only . . . anything more smoked them. >Yes, I'm looking at video RCA jack OUT feed that will then go into >box that hooks to USB. So I don't need to mess with anything USB as >far as video is concerned. > >I need to dig into all this info to figure out a way ahead. > >Bob, how would I go about getting boards like the one you posted pics of? Give me an address . . . I'll mail them to you. How are your soldering/fabrication skills? You'll have to chase down some parts and package the stuff up in some suitable enclosure. Bob . . . ________________________________ Message 5 _____________________________________ Time: 08:54:38 AM PST US Subject: Re: AeroElectric-List: Dual Power Inputs, Dual Buss Electrical System From: Bill Watson On 10/11/2017 11:09 AM, Robert L. Nuckolls, III wrote: > At 08:37 AM 10/11/2017, you wrote: >> Im redoing my panel in my aircraft which I built 15 years ago with a >> Z-14 electrical system. Im installing a Garmin G3X panel and all the >> associated boxes. Most of them have the capability to wire for 2 >> separate power sources. With dual buss with crossfeed, Im wondering >> if there is any significant benefit to having two CBs and two power >> feeds. I can think of a couple failure modes, but they seem remote. >> There is also a configuration using a backup battery on the second >> power feed, maybe thats a better choice. Thanks in advance for the >> feedback. > > With two batteries, two alternators and crossfeed, > there is no value in exploiting the redundancy > features you cited. Z14 has all that stuff built > in. > > Bob . . . > I have a Z-14 and agree. There are even some potential disadvantages. I originally connected my (3) GRT EFISs to one bus and not incidentally, the engine starter circuit to the other bus. That configuration combined with an inadequate light weight starter originally supplied with the 6 cylinder IO-540 on the RV-10, meant that cross fed starts would sometimes reboot the GRTs. And starting with just 1 battery was marginal in cold weather. Given that I had no on/off switch for the GRTs, this was inconvenient given the boot time required. And it turned out that early versions of the GRT code did not like to have their boot sequence interrupted though that problem was fixed in later releases of the code. Ideally as Bob has explained, one wants to start with the batteries cross-fed to keep stress on the batteries to a minimum. Then to do normal flight operations with 2 separate buses which makes any failure identification easier and would keep any damaging component isolated. The other capability I wanted from my Z-14 was to be able to run my panel for an extended period of time on occasion without concern for having enough juice for a subsequent engine start. this is where the main disadvantage might lie. The GRTs are capable of connecting to up to 3 power supplies. At one point I used 2 of those inputs to connect them to both buses. That was a mistake because I found that my ability to run the panel for an extended period was diminished. That created several problematic scenarios that I just shouldn't have had to deal with. In other words, the Z-14 gave me a lot of flexibility as long as I connect individual components to one bus or the other. It allows one to identify and isolate problem components and flexibly manage one's batteries if desired. If you crossfeed individual components at the component, you give some of that capability away with little if anything gained. Post Script: Replacing the starter eliminated all problems with cross fed and single battery starts. Returning to a single power supply on a single bus for each GRT gave me back the battery management flexibility. Bill "I love my Z-14" Watson --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 09:16:09 AM PST US Subject: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter From: "Airdog77" Bob, Thanks a ton! I'll email you my address. Soldering skills are not horrible. Have done very little on circuit boards, but I have managed small stuff with pretty good results. I tested out the camera hooked up to my TV using a 12V battery and the picture was really good for such a small camera. That's when I decided to press forward with these mini cameras. Regards, Wade -------- Airdog Wade Parton Building Long-EZ 916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473496#473496 ________________________________ Message 7 _____________________________________ Time: 09:24:40 AM PST US From: Subject: RE: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter Pretty cool idea to use the mini-camera with the GRT EFIS. I'm building a taildragger (Bearhawk Patrol) and am considering using a camera like this for "taxi assistance" since the engine/cowl somewhat obscures what's in front of you. Not that this is a replacement for S-turns, but just another tool in the toolbox. At a price of $8-10, why not use it to add to the situational awareness? Jim Parker ________________________________ Message 8 _____________________________________ Time: 09:30:28 AM PST US Subject: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter From: "Airdog77" Hey Jim, Definitely! It really is a neat little feature. Be advised that the optional module & software to link into your EFIS runs $150 from GRT. Cheers, Wade -------- Airdog Wade Parton Building Long-EZ 916WP www.longezpush.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=473498#473498 ________________________________ Message 9 _____________________________________ Time: 11:19:01 AM PST US Subject: Re: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter From: Charlie England On 10/12/2017 11:30 AM, Airdog77 wrote: > > Hey Jim, > > Definitely! It really is a neat little feature. > > Be advised that the optional module & software to link into your EFIS runs $150 from GRT. > > Cheers, > Wade > Or, there's plan B: a $10 USB camera & a $15 android cell phone. :-) --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 10 ____________________________________ Time: 11:46:51 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Dual Power Inputs, Dual Buss Electrical System I have a Z-14 and agree. There are even some potential disadvantages. I originally connected my (3) GRT EFISs to one bus and not incidentally, the engine starter circuit to the other bus. That configuration combined with an inadequate light weight starter originally supplied with the 6 cylinder IO-540 on the RV-10, meant that cross fed starts would sometimes reboot the GRTs. And starting with just 1 battery was marginal in cold weather. Given that I had no on/off switch for the GRTs, this was inconvenient given the boot time required. And it turned out that early versions of the GRT code did not like to have their boot sequence interrupted though that problem was fixed in later releases of the code. Ideally as Bob has explained, one wants to start with the batteries cross-fed to keep stress on the batteries to a minimum. Then to do normal flight operations with 2 separate buses which makes any failure identification easier and would keep any damaging component isolated. The other capability I wanted from my Z-14 was to be able to run my panel for an extended period of time on occasion without concern for having enough juice for a subsequent engine start. this is where the main disadvantage might lie. The GRTs are capable of connecting to up to 3 power supplies. At one point I used 2 of those inputs to connect them to both buses. That was a mistake because I found that my ability to run the panel for an extended period was diminished. That created several problematic scenarios that I just shouldn't have had to deal with. In other words, the Z-14 gave me a lot of flexibility as long as I connect individual components to one bus or the other. It allows one to identify and isolate problem components and flexibly manage one's batteries if desired. If you crossfeed individual components at the component, you give some of that capability away with little if anything gained. Post Script: Replacing the starter eliminated all problems with cross fed and single battery starts. Returning to a single power supply on a single bus for each GRT gave me back the battery management flexibility. Bill "I love my Z-14" Watson Bill mentions a starter replacement . . . what kind of starter was removed and what was the replacement? This trace I captured of my 87 GMC pickup was no doubt produced by inrush from a wound- field starter. Here we see that the bus falls to 8v for a few hundred microseconds. [] Figure 1. I suspect that my younger cars may have PM starter motors. I'll look into that. We had some discussions at B&C many years ago about the market shift of permanent magnet starter motors. We elected not to join the parade . . . primarily because the wound field motor had lower inrush currents and offered better cold weather cranking efficiency when the battery was being degraded by the cold weather. Emacs! Figure 8. At the risk of being redundant, I'm repeating an assertion that was offered some years ago when engine cranking inrush reboots first raised their heads . . . I think it was back in the days of Blue Mountain market roll out. At that time, I posted the image above excerpted from Mil-STD-704/DO-160 assertions suggesting that suppliers to the industry should expect power perturbations over the constellation of conditions illustrated. Since that time, a number of processor based products have been introduced to the market that re-boot when the bus falls into normal/expected regions during engine start. While the condition doesn't damage the appliance, it does interrupt normal operations until the thing stands back up. Intuitively, I believe it's possible to design this characteristic out of most such products . . . but until and unless the marketplace makes their desires known to suppliers, nothing will change. In the mean time, consumers of such products are obliged to make fundamental changes to power system architectures to accommodate an appliance that might well have been designed for airplane friendly operations in the first place. It wouldn't be out of line for Listers who own such products to put the manufacturers on notice that they've stubbed their toe. Fee free to reference my writings. I'm also willing to talk with any party interested in upgrading their product. Give 'em my phone number too if you like. Bob . . . ________________________________ Message 11 ____________________________________ Time: 11:49:07 AM PST US From: "Robert L. Nuckolls, III" Subject: RE: AeroElectric-List: Re: Constructing an automatic RCA video camera feed splitter At 11:22 AM 10/12/2017, you wrote: > >Pretty cool idea to use the mini-camera with the GRT EFIS. I'm building >a taildragger (Bearhawk Patrol) and am considering using a camera like >this for "taxi assistance" since the engine/cowl somewhat obscures >what's in front of you. Not that this is a replacement for S-turns, but >just another tool in the toolbox. At a price of $8-10, why not use it to >add to the situational awareness? I've rented some cars with back-up cameras . . . pretty handy. Why not a taxi forward camera? Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.