Today's Message Index:
----------------------
1. 06:29 AM - Re: trouble with building Contactor 'Cooler' duty controller (Yahoo hasbroucka)
2. 08:39 AM - Re: Eye Beam Mini LED / RF interference (jonlaury)
3. 09:38 AM - Re: Re: Eye Beam Mini LED / RF interference (Robert L. Nuckolls, III)
4. 03:17 PM - Re: trouble with building Contactor 'Cooler' duty controller (Jan)
5. 03:34 PM - Re: trouble with building Contactor 'Cooler' duty controller (Robert L. Nuckolls, III)
6. 03:56 PM - Speakers for helmet installation (Richard Girard)
7. 05:30 PM - Re: Speakers for helmet installation (Charlie England)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | trouble with building Contactor 'Cooler' duty |
controller
The link is http://tinyurl.com/bolkoyc
The list posts are: Post subject: Latching Relay Redux
Alan ,
HasbrouckA@yahoo.com
SeaRey Amphibian, framework and hull assembled (not covered). Working on
VFR
avionics and wiring (Dynon Skyview full suite). Top Priority is keep it
light, and place weight forward!
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jan
Sent: Tuesday, February 26, 2013 11:53 PM
Subject: Re: AeroElectric-List: trouble with building Contactor 'Cooler'
duty controller
What is the link to the circuit please - I have been looking on your web
site but not able to find it
All the best
Jan
On Feb 27, 2013, at 3:06, "Robert L. Nuckolls, III"
<nuckolls.bob@aeroelectric.com> wrote:
At 11:12 AM 2/26/2013, you wrote:
I?m building a SeaRey Rotax 914, and am close on alternator amperage
output.
After reviewing archives I have now attempted to construct Bob?s
?Contactor
Cooler?. I am very weak on electronics knowledge, but for the $20
investment, I gave it a shot.
I noticed that Caps come is different ratings and materials of
construction,
and for this stage of the experiment I decided to ignore this and simply
purchase the uf ratings as listed on the schematic. Do the voltage
ratings
or materials of construction matter to this device?
Not especially. Anything over 12v works.
I finished assembly today, and noticed that I did not purchase any
iN400X
diodes (I assume the X could be any available #?) I recognized the 400X
as
voltage spike protection for avionics, so I decided to proceed without a
diode across the contactor coil.
No, the 'x' means don't care. Any number from
0 to 9 is suited to the task.
The device worked for three cycles, about 5 seconds each, and simply no
longer operates the contactor. There was no smoke and no detectable
warmth.
I suspect that the missing diode allowed the coil V-spike to damage my
assembly?
That's a fair assumption. What does the contactor do?
If your IRF510 is shorted, the contactor will simply
pull in at full voltage. I suspect that this is what's
happening. Give us a voltage measurement on your contactor
coil when the device is powered up. Also a voltage
measurement at pin 3 of the 555 say 10 seconds after
the device is powered up.
If so, can anyone tell me which device is most likely to need
replacement?
(timer, transistor, diodes, resistors or caps) Not knowing much of
electronics, I only know how to test the resistors and diodes, but this
is
complicated by lack of isolation.
As Lord Kelvin opined many years ago:
?When you can measure what you are speaking about, and express it in
numbers, you know something about it, when you cannot express it in
numbers,
your knowledge is of a meager and unsatisfactory kind; it may be the
beginning of knowledge, but you have scarcely, in your thoughts advanced
to
the stage of science.?
Let's get the numbers. By the way, thanks
for taking this project on. Let's make sure
the outcome expands your knowledge and the
utility of your airplane.
Bob . . .
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Eye Beam Mini LED / RF interference |
Joe,
Not sure if the the little eyeball sold by VAn's (and Spruce) is incandescent,
but the light output compared to the EB Mini is like comparing a match to the
sun. The EB also is dimmable. The little eyeball needs to be fairly close to the
target to provide meaningful light, but they are inexpensive and smaller.
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=395192#395192
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Eye Beam Mini LED / RF interference |
At 10:36 AM 2/27/2013, you wrote:
>
>Joe,
>Not sure if the the little eyeball sold by VAn's (and Spruce) is
>incandescent, but the light output compared to the EB Mini is like
>comparing a match to the sun. The EB also is dimmable. The little
>eyeball needs to be fairly close to the target to provide meaningful
>light, but they are inexpensive and smaller.
Those were originally incandescent. They would no doubt
benefit from an LED upgrade. some builders have ordered
red or white LED fixtures from our website
https://matronics.com/aeroelectric/Catalog/9002-100-5s.jpg
One of these mounted on both sides of the canopy frame
were used to flood the panel on RV3/4/8 projects.
They proved to be bright enough . . . in fact needed
to be dimmed for navigation in full darkness.
Bob . . .
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: trouble with building Contactor 'Cooler' duty |
controller
Thanks ! Do you know how much electrical noise this circuit generates ?
All the best
Jan
On Feb 27, 2013, at 22:25, Yahoo hasbroucka <hasbroucka@yahoo.com> wrote:
> The link is http://tinyurl.com/bolkoyc
>
> The list posts are: Post subject: Latching Relay Redux
>
> Alan ,
> HasbrouckA@yahoo.com
> SeaRey Amphibian, framework and hull assembled (not covered). Working on V
FR avionics and wiring (Dynon Skyview full suite). Top Priority is keep it l
ight, and place weight forward!
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelect
ric-list-server@matronics.com] On Behalf Of Jan
> Sent: Tuesday, February 26, 2013 11:53 PM
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: trouble with building Contactor 'Cooler' d
uty controller
>
> What is the link to the circuit please - I have been looking on your web s
ite but not able to find it
>
> All the best
>
> Jan
>
> On Feb 27, 2013, at 3:06, "Robert L. Nuckolls, III" <nuckolls.bob@aeroelec
tric.com> wrote:
>
>> At 11:12 AM 2/26/2013, you wrote:
>>
>> I?m building a SeaRey Rotax 914, and am close on alternator amperage outp
ut. After reviewing archives I have now attempted to construct Bob?s ?Contac
tor Cooler?. I am very weak on electronics knowledge, but for the $20 invest
ment, I gave it a shot.
>>
>> I noticed that Caps come is different ratings and materials of constructi
on, and for this stage of the experiment I decided to ignore this and simply
purchase the uf ratings as listed on the schematic. Do the voltage ratings o
r materials of construction matter to this device?
>>
>> Not especially. Anything over 12v works.
>>
>>
>> I finished assembly today, and noticed that I did not purchase any iN400X
diodes (I assume the X could be any available #?) I recognized the 400X as v
oltage spike protection for avionics, so I decided to proceed without a diod
e across the contactor coil.
>>
>> No, the 'x' means don't care. Any number from
>> 0 to 9 is suited to the task.
>>
>>
>> The device worked for three cycles, about 5 seconds each, and simply no l
onger operates the contactor. There was no smoke and no detectable warmth.
>>
>> I suspect that the missing diode allowed the coil V-spike to damage my as
sembly?
>>
>> That's a fair assumption. What does the contactor do?
>> If your IRF510 is shorted, the contactor will simply
>> pull in at full voltage. I suspect that this is what's
>> happening. Give us a voltage measurement on your contactor
>> coil when the device is powered up. Also a voltage
>> measurement at pin 3 of the 555 say 10 seconds after
>> the device is powered up.
>>
>>
>>
>> If so, can anyone tell me which device is most likely to need replacement
? (timer, transistor, diodes, resistors or caps) Not knowing much of electro
nics, I only know how to test the resistors and diodes, but this is complica
ted by lack of isolation.
>>
>> As Lord Kelvin opined many years ago:
>> ?When you can measure what you are speaking about, and express it in numb
ers, you know something about it, when you cannot express it in numbers, you
r knowledge is of a meager and unsatisfactory kind; it may be the beginning o
f knowledge, but you have scarcely, in your thoughts advanced to the stage o
f science.?
>>
>> Let's get the numbers. By the way, thanks
>> for taking this project on. Let's make sure
>> the outcome expands your knowledge and the
>> utility of your airplane.
>>
>>
>>
>>
>> Bob . . .
>>
>>
>>
>>
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: trouble with building Contactor 'Cooler' duty |
controller
At 05:15 PM 2/27/2013, you wrote:
>Thanks ! Do you know how much electrical noise this circuit generates ?
>
>All the best
Should be tolerably low. It won't have
any radio frequency issues and conducted
audio frequency noise onto bus is very
low compared with other noises (like
alternator ripple).
Bob . . .
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Speakers for helmet installation |
All, I fly a trike wearing a full face Shoei helmet. While the helmet
doesn't seal my ears like headphones it does cut down the noise
considerably. It also cuts out my ability to hear my radio so I want to put
speakers and a small mic in the helmet. I did this once before
cannabalizing a Cobra VOX family radio for hang gliding. I don't want to
cannabalize my David Clarks this time so the speakers and mic will be
compatible with my hand held (a Vertex). Mouser has lots of mylar diaphragm
speakers of the right size and depth. Can anyone recommend a particular
speaker or mic cartridge that has worked for you?
Rick Girard
Do not archive
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Speakers for helmet installation |
On 02/27/2013 05:55 PM, Richard Girard wrote:
> All, I fly a trike wearing a full face Shoei helmet. While the helmet
> doesn't seal my ears like headphones it does cut down the noise
> considerably. It also cuts out my ability to hear my radio so I want
> to put speakers and a small mic in the helmet. I did this once before
> cannabalizing a Cobra VOX family radio for hang gliding. I don't want
> to cannabalize my David Clarks this time so the speakers and mic will
> be compatible with my hand held (a Vertex). Mouser has lots of mylar
> diaphragm speakers of the right size and depth. Can anyone recommend a
> particular speaker or mic cartridge that has worked for you?
>
> Rick Girard
> Do not archive
>
> --
> Zulu Delta
> Mk IIIC
> Thanks, Homer GBYM
>
For the earphones, have you tried a pair of stereo 'ear buds'? It would
be pretty simple to try, with a 1/4" to 1/8" adapter. I've used a couple
of different types with a regular aircraft radio/intercom, & they worked
fine without any impedance matching devices. A pair of these under an
el-cheapo noise canceling headset (plug in the ear buds & leave the
headset phone plug 'loose') makes an incredibly quiet environment.
For a while, Plantronics made a little gaming headset consisting of ear
buds with a tiny boom mic off one of the buds. I've got a couple of
pairs, & they work with a/c radios/intercoms except for the problem of
the mic boom being too short to get the mic directly in front of your lips.
You could probably cannibalize a regular gaming headset to get a mic,
and the earphones too, if you want regular over-the-ear style instead of
in-ear. Ebay & Amazon have hundreds of choices. Many are so inexpensive
that the entire headset costs less than what a/c headset makers want to
charge for just a replacement mic cartridge.
The impedance matching issue is often a non-issue, due to the typically
low output impedance in any device made within the last couple of decades.
Charlie
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|