---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 01/29/21: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:20 PM - Re: Some Thoughts on Z101 (prestonkavanagh) 2. 03:05 PM - Re: Re: Some Thoughts on Z101 (Charlie England) 3. 08:20 PM - Poor Man's Battery Tester (Roger Evenson) ________________________________ Message 1 _____________________________________ Time: 02:20:52 PM PST US Subject: AeroElectric-List: Re: Some Thoughts on Z101 From: "prestonkavanagh" This has turned into a thread on alternative ways of providing a brownout bus. As discussed in the past, we don't necessarily need one. Accepting that my Garmin GPS-Comm might cutout on startup, and that there are situations where this would be inconvenient, in my Z101 design I'm including a booster (see attached photos). I built two small boxes and both work. Now I pick one and decide whether to brown-out protect a circuit or add a small brownout bus. Yes, I should add a diode. Other comments? Skip this complication entirely? -------- PBK3 PA-12, BD-4, RV6a, gliders Read this topic online here: http://forums.matronics.com/viewtopic.php?p=500465#500465 Attachments: http://forums.matronics.com//files/boost2_166.png http://forums.matronics.com//files/boost1_133.png ________________________________ Message 2 _____________________________________ Time: 03:05:26 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Re: Some Thoughts on Z101 On Fri, Jan 29, 2021 at 4:25 PM prestonkavanagh wrote: > preston.kavanagh@gmail.com> > > This has turned into a thread on alternative ways of providing a brownout > bus. As discussed in the past, we don't necessarily need one. Accepting > that my Garmin GPS-Comm might cutout on startup, and that there are > situations where this would be inconvenient, in my Z101 design I'm > including a booster (see attached photos). I built two small boxes and > both work. Now I pick one and decide whether to brown-out protect a > circuit or add a small brownout bus. Yes, I should add a diode. Other > comments? Skip this complication entirely? > > -------- > PBK3 > PA-12, BD-4, RV6a, gliders > > Have you tested the 'dual' version for proper boost operation? The data sheet hints that it is a buck converter; not boost. As to whether to include brownout: If there's no delay, or the delay in bootup of your installed devices isn't inconvenient, then don't install one. I had hoped that a new battery would solve my issue, but it didn't. I installed one because my older EFIS equipment requires several minutes to fully boot, and often will 'lock up' during cranking, requiring me to shut off the entire airframe to enable a re-start of the EFIS equipment. Livable in winter, but in summer, it just wastes fuel to sit idling so long. (Almost all my flying is from uncontrolled fields, so clearance delivery isn't a factor for me.) Charlie ________________________________ Message 3 _____________________________________ Time: 08:20:03 PM PST US From: Roger Evenson Subject: AeroElectric-List: Poor Man's Battery Tester I built Bob's "Poor Man's Battery Capacity Tester". Somehow I got the impression the relay would 'drop' out and thus turn off the lamp and clock when the battery reached about 10V. But after re-reading "Battery Replacement: A Plan for Throwing in the Towel", that expectation is not written there. My experience has been that it turns off when the battery reaches about 4V. Odyssey Load Test Procedure and Reconditioning Procedures recommend ending the test at 10V. I've done this, but it requires my presence when the battery nears 10V. Is there a way to modify this circuit so that it will 'turn off' when the battery reaches 10V? Or, is there a commercially available tester that would load a battery at 4 amps and record the time required until the battery reaches 10V? Roger. ------------------------------------------------------------------------------------- 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.