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  Topic: Lacing two cores of 22awg
Eric Page

Replies: 5
Views: 150

PostForum: AeroElectric-List   Posted: Wed Mar 27, 2019 3:51 pm   Subject: Lacing two cores of 22awg
Try putting the search term “wire wrap braid” into eBay. The stuff comes in myriad colors and diameters at minimal cost.

Eric


On Mar 27, 2019, at 16:25, Alec Myers <alec@alecmyers.com ...
  Topic: Battery BMS failures?
Eric Page

Replies: 14
Views: 368

PostForum: AeroElectric-List   Posted: Fri Mar 22, 2019 7:42 am   Subject: Battery BMS failures?
On Mar 22, 2019, at 07:00, Robert L. Nuckolls, III <nuckolls.bob@aeroelectric.com> wrote:
If the aircraft had 3-phase alternators and separate starters, then DC power was derived from transf ...
  Topic: Battery BMS failures?
Eric Page

Replies: 14
Views: 368

PostForum: AeroElectric-List   Posted: Thu Mar 21, 2019 3:58 pm   Subject: Battery BMS failures?
On Mar 21, 2019, at 10:28, C&K <yellowduckduo@gmail.com> wrote:
An aircraft of that size and vintage may have had a battery charger that monitored temperature and could limit charging cur ...
  Topic: Battery BMS failures?
Eric Page

Replies: 14
Views: 368

PostForum: AeroElectric-List   Posted: Thu Mar 21, 2019 8:52 am   Subject: Battery BMS failures?
On Mar 21, 2019, at 08:36, Robert L. Nuckolls, III <nuckolls.bob@aeroelectric.com> wrote:

Did you ever have occasion to take a hot battery off line?

Just once, but not in flight. After ...
  Topic: Battery BMS failures?
Eric Page

Replies: 14
Views: 368

PostForum: AeroElectric-List   Posted: Wed Mar 20, 2019 10:37 am   Subject: Re: Battery BMS failures?
Speaking of BMS, perhaps you can explain (since EarthX seems unable) why EarthX batteries, with their 'full BMS', have a limit on alternator current capability based on their battery capacity. I am un ...
  Topic: Battery
Eric Page

Replies: 23
Views: 1217

PostForum: AeroElectric-List   Posted: Sat Jan 19, 2019 5:47 pm   Subject: Re: Battery
chargers similar to this $3.25 module that I have found to be more accurate and consistent than the AC powered Schumacher chargers for lead acid VRLA batteries. These are not unregulated trickle charg ...
  Topic: DIY Crowbar OVM
Eric Page

Replies: 3
Views: 312

PostForum: AeroElectric-List   Posted: Wed Jan 16, 2019 6:20 pm   Subject: Re: DIY Crowbar OVM
Sebastien,

Your capacitor is non-polarized; its orientation doesn't matter.

Eric
  Topic: Stall warning through Radio
Eric Page

Replies: 9
Views: 1021

PostForum: AeroElectric-List   Posted: Fri Nov 30, 2018 6:57 pm   Subject: Stall warning through Radio
Joe, you might try searching eBay for “voice recorder module.” There are several variants that can record whatever you wish, and play it back when triggered. Prices start at $0.99.

Eric
  Topic: Cheap bench supply?
Eric Page

Replies: 18
Views: 1198

PostForum: AeroElectric-List   Posted: Tue Nov 13, 2018 5:45 pm   Subject: Re: Cheap bench supply?
Charlie,

I’ve had a 0-60V 5A unit very similar to that one for several years. The electrolytic on its output once sizzled and smoked, but was easy to replace with a good Rubycon. You can expect ...
  Topic: A brown-out alternative?
Eric Page

Replies: 42
Views: 6419

PostForum: AeroElectric-List   Posted: Fri Oct 12, 2018 1:59 pm   Subject: Re: A brown-out alternative?
Now my concern is that when the starter button is released, does the boost disappear too soon? i.e. before the starter contactor releases and unloads the battery?

The circuit does delay shut-off of ...
  Topic: A brown-out alternative?
Eric Page

Replies: 42
Views: 6419

PostForum: AeroElectric-List   Posted: Thu Oct 11, 2018 9:40 pm   Subject: Re: A brown-out alternative?
I wired it as shown so that in the milliseconds after start switch closure until the contactor closes, the converter has time to come up and shoulder the load.

That makes perfect sense. My suggest ...
  Topic: A brown-out alternative?
Eric Page

Replies: 42
Views: 6419

PostForum: AeroElectric-List   Posted: Mon Oct 08, 2018 9:55 pm   Subject: Re: A brown-out alternative?
I mentioned a few days ago that I thought I had yet another solution to the perennial brown-out gremlin.



Clever idea, Bob -- I like it!

As Charlie mentioned, the current drawn by the DC-DC b ...
  Topic: PASS-THROUGH CHARGER
Eric Page

Replies: 37
Views: 3951

PostForum: AeroElectric-List   Posted: Wed Oct 03, 2018 9:30 pm   Subject: Re: PASS-THROUGH CHARGER
If anyone is interested in applying a COTS down-converter to their RPi (or any other system with a 5.0v operating bus), I can offer an ov protection system that far exceeds the capability of the SMBJ5 ...
  Topic: Seeking DB15 breakout / tester box
Eric Page

Replies: 8
Views: 1248

PostForum: AeroElectric-List   Posted: Mon Aug 20, 2018 6:51 am   Subject: Seeking DB15 breakout / tester box
Art,


I couldn’t find a U.S. seller so you may have to wait a few weeks for delivery, but I think this is what you’re looking for:


Folks,


I have an RS232 problem between my EFIS and ...
  Topic: Constructing an automatic RCA video camera feed splitter
Eric Page

Replies: 6
Views: 2085

PostForum: AeroElectric-List   Posted: Tue Jul 31, 2018 10:26 am   Subject: Re: Constructing an automatic RCA video camera feed splitte
Update on the video multiplexer project:

Alec developed and tested firmware for the multiplexer, then programmed the prototype board that I sent him. He then returned it to me and I finished the a ...
  Topic: Education is EXPENSIVE but information is FREE
Eric Page

Replies: 1
Views: 508

PostForum: AeroElectric-List   Posted: Sat Jul 21, 2018 3:44 pm   Subject: Re: Education is EXPENSIVE but information is FREE
Excellent find, Bob! For anyone who wants electronics study material in an online format, check out these two sites:

https://www.electronics-tutorials.ws/

https://www.allaboutcircuits.com/textb ...
  Topic: Low Battery Voltage Blows Fuel Pump Fuse?
Eric Page

Replies: 16
Views: 1891

PostForum: AeroElectric-List   Posted: Tue May 22, 2018 1:52 pm   Subject: Re: Low Battery Voltage Blows Fuel Pump Fuse?
If a junction device goes catastrophic it generally dead shorts or blows open (usually scattering bits of plastic around). If this diode was shorted, it would pop the fuse immediately on application o ...
  Topic: Low Battery Voltage Blows Fuel Pump Fuse?
Eric Page

Replies: 16
Views: 1891

PostForum: AeroElectric-List   Posted: Tue May 22, 2018 8:27 am   Subject: Re: Low Battery Voltage Blows Fuel Pump Fuse?
For the benefit of those following via email echo, in my previous post, I meant TVS diode D2, not D4. I've edited my original post on the forum to correct this error.

Eric

do not archive
  Topic: Low Battery Voltage Blows Fuel Pump Fuse?
Eric Page

Replies: 16
Views: 1891

PostForum: AeroElectric-List   Posted: Tue May 22, 2018 7:15 am   Subject: Re: Low Battery Voltage Blows Fuel Pump Fuse?
I've been pondering the potential for the electronics to go into some kind of 'crowbar' condition during the brownout transient . . .

Here's an exemplar circuit snatched from patent application 200 ...
  Topic: Starting the Engine Reboots the EFIS
Eric Page

Replies: 41
Views: 4309

PostForum: AeroElectric-List   Posted: Thu May 17, 2018 4:58 pm   Subject: Re: Starting the Engine Reboots the EFIS
I do still have circuit boards available for this project. Ordinarily I’d be happy to assemble another one, but I’m just starting to build a house and my free time is extremely limited. If you r ...
 
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