Peter(at)sportingaero.com
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 Posted: Mon Dec 20, 2021 10:35 am Post subject: ****SPAM**** Re: Low voltage warning light |
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| Quote: | A few years ago I bought a self-contained large LED from Perihelion Design, but that is no longer available
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From: owner-aeroelectric-list-server(at)matronics.com <owner-aeroelectric-list-server(at)matronics.com> On Behalf Of DANIEL PELLETIER
Sent: 20 December 2021 00:15
To: aeroelectric-list(at)matronics.com
Subject: ****SPAM**** Re: Low voltage warning light
www.PerihelionDesign.com
Envoyé de mon iPad
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Le 17 déc. 2021 à 17:58, Bill Boyd <sportav8r(at)gmail.com (sportav8r(at)gmail.com)> a écrit :
I have a spare yellow incandescent light from B&C designed to be used with their regulators. I used a pair of these regulators for my two-alternator design, and have the low voltage warning light powered only by the regulator for the backup alternator wired so that it extinguishes as long as the main alternator is online, putting out its higher set voltage.
If you are using B&C or similar regulators, this bulb might be just what you need. Yours for an SASE if it can be of help to your project.
Should show ok in this pic.
-Bill B
On Fri, Dec 17, 2021 at 5:26 PM Charlie England <ceengland7(at)gmail.com (ceengland7(at)gmail.com)> wrote:
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On Fri, Dec 17, 2021 at 3:34 PM Peter Pengilly <Peter(at)sportingaero.com (Peter(at)sportingaero.com)> wrote:
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I’m looking for a low voltage warning light that illuminates at around 13.2 to 13.5 volts, can anyone recommend one?
I like having a large, bright, low voltage warning light in my panel that indicates when the battery is supporting the electrical loads.
A few years ago I bought a self-contained large LED from Perihelion Design, but that is no longer available and I have sold that aeroplane.
My current aeroplane does not have a good warning system so I would like to buy another.
I could build one from an op amp and a couple of resistors, but I’m not that great with electronics and I’ve got too much other stuff to do right now. The Perihelion unit was well packaged and easy to install. I would like to buy something similar. Can anyone recommend anything?
Peter
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Hi Peter,
Dan Horton (posts on Van's Air Force, and sometimes on HBA) recommended these modules, or a similar product, from TomTop:
https://www.tomtop.com/p-e1021.html#flow_qa
I bought a couple to play with a couple of years ago, but have never taken the time to experiment with them. The site says they're currently out of stock, but you might be able to find a similar product on the site. You'd still need to add your own display lamp or LED; the device just provides a set of 'dry' relay contacts.
Depending on which alternator you're using, it may well have built-in low voltage detection; all you'd need to do in that case is hook up a wire to your warning light (the alternator drives an 'idiot light').
Charlie
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