Today's Message Index:
----------------------
1. 04:17 AM - Re: Re: AeroElectric-List Digest: 2 Msgs - 03 (Charles Kuss)
2. 07:20 AM - Re: Re: AeroElectric-List Digest: 2 Msgs - 03/20/20 (ashleysc@broadstripe.net)
3. 07:21 AM - Re: Re: AeroElectric-List Digest: 2 Msgs - 03 (ashleysc@broadstripe.net)
4. 08:26 AM - Re: AeroElectric-List Digest: 2 Msgs - 03/20/20 (johnbright)
5. 08:50 AM - Re: Re: AeroElectric-List Digest: 2 Msgs - 03 (Dick Tasker)
6. 09:17 AM - Re: Re: AeroElectric-List Digest: 2 Msgs - 03 (ashleysc@broadstripe.net)
7. 01:18 PM - Re: Re: AeroElectric-List Digest: 2 Msgs - 03/20/20 (Robert L. Nuckolls, III)
8. 10:54 PM - Re: Boost Your Marks Via Assignment Help Online Services (oliviacrew)
Message 1
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03 |
Tim,=C2-LEDs operate on 3 volts or less. You cannot Supply an LED with mo
re than 5 volts at the very maximum. Generally you have to install a resist
or in the circuit to drop the voltage down to a safe level for the LED. Bot
tom line is you've probably destroyed that LED.
Charlie
Sent from Yahoo Mail on Android
On Sun, Mar 22, 2020 at 1:50 AM, Tim Jennings<tjennings07@gmail.com> wrot
e:
Hello.=C2- I have a SB1B-14=C2-https://bandc.com/product/standby-altern
ator-controller-14v-homebuilt/=C2- installed in my plane and previously u
sed the supplied 12 volt incandescent bulb as the annunciator.=C2- I rece
ntly cut a new panel and installed a 12 volt LED bulb in place of the incan
descent one.=C2- For some reason the led does not light up.=C2- There w
as 11.8 volts at the led bulb but it would not light up.=C2- On the bench
power supply it lights up well below 10 volts.=C2- Per the SB1B-14 produ
ct details "Note: low-voltage monitoring and warning system designed for us
e with an incandescent lamp (supplied) only.".=C2- Is there a simple way
to make this work utilizing my led bulb on the panel?=C2- Maybe wire the
led bulb in series with the "hidden and out of sight" incandescent bulb beh
ind the panel? Thanks for your input.
--
- Tim Jennings
Message 2
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03/20/20 |
Hi Tim;
Try reversing the leads to the LED. Mine only lights in one direction of current
flow.
Cheers! Stu.
----- Original Message -----
From: "Tim Jennings" <tjennings07@gmail.com>
Sent: Saturday, March 21, 2020 10:28:18 PM
Subject: AeroElectric-List: Re: AeroElectric-List Digest: 2 Msgs - 03/20/20
Hello. I have a SB1B-14 https://bandc.com/product/standby-alternator-controller-14v-homebuilt/
installed in my plane and previously used the supplied 12 volt
incandescent bulb as the annunciator. I recently cut a new panel and installed
a 12 volt LED bulb in place of the incandescent one. For some reason the led
does not light up. There was 11.8 volts at the led bulb but it would not light
up. On the bench power supply it lights up well below 10 volts. Per the SB1B-14
product details " Note: low-voltage monitoring and warning system designed
for use with an incandescent lamp (supplied) only. ". Is there a simple way to
make this work utilizing my led bulb on the panel? Maybe wire the led bulb in
series with the "hidden and out of sight" incandescent bulb behind the panel?
Thanks for your input.
--
- Tim Jennings
Message 3
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03 |
Hi Tim and Charlie;
It's a complicated world out there. I have an LED that works on 12 volts. Don't
know how that's accomplished, but Charlie has a good point. Need to find the
intended voltage.
Cheers! Stu.
----- Original Message -----
From: "Charles Kuss" <chaskuss@yahoo.com>
Sent: Sunday, March 22, 2020 4:14:55 AM
Subject: Re: AeroElectric-List: Re: AeroElectric-List Digest: 2 Msgs - 03
Tim,
LEDs operate on 3 volts or less. You cannot Supply an LED with more than 5 volts
at the very maximum. Generally you have to install a resistor in the circuit
to drop the voltage down to a safe level for the LED. Bottom line is you've probably
destroyed that LED.
Charlie
Sent from Yahoo Mail on Android
On Sun, Mar 22, 2020 at 1:50 AM, Tim Jennings
<tjennings07@gmail.com> wrote:
<blockquote>
Hello. I have a SB1B-14 https://bandc.com/product/standby-alternator-controller-14v-homebuilt/
installed in my plane and previously used the supplied 12 volt
incandescent bulb as the annunciator. I recently cut a new panel and installed
a 12 volt LED bulb in place of the incandescent one. For some reason the led
does not light up. There was 11.8 volts at the led bulb but it would not light
up. On the bench power supply it lights up well below 10 volts. Per the SB1B-14
product details " Note: low-voltage monitoring and warning system designed
for use with an incandescent lamp (supplied) only. ". Is there a simple way to
make this work utilizing my led bulb on the panel? Maybe wire the led bulb in
series with the "hidden and out of sight" incandescent bulb behind the panel?
Thanks for your input.
--
- Tim Jennings
</blockquote>
Message 4
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03/20/20 |
Use an LED instead of incandescent volts warn light with B&C regulators.
This from Aeroelectric files:
http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg
--------
John Bright, RV-6A, at FWF, O-360
Single batt dual alt SDS EM-5-F.
john_s_bright@yahoo.com, Newport News, Va
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495385#495385
Message 5
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03 |
If you have an LED that works on 12V then it is an assembly that includes a resistor
in series with the actual LED. These can be designed for any arbitrary voltage
that is more than the minimum for
the LED which is between 1.8 and 3.3 volts depending on the LED color. Just choose
a resistor that limits the LED current to less than the maximum rating at
the desired voltage. For instance, with a
red LED, which runs drops 1.8V designed for a 10mA current would use a ohm resistor.
(V/I = R : (12-1.8)/.01 = 666 ohms) Of course resistors come in discrete
values so in this case you would
probably use a 680 ohm resistor. One would also have to calculate the power rating
required for the resistor. (V*I = P : (12-1.8)/.01 = 0.102). In this case
just about any resistor you can buy will
work, but to be safe use a 1/4 watt rated resistor.
I may be wrong, but I seem to remember reading somewhere that the scheme you want
to use works if you put a resistor in parallel with the 12V LED that simulates
the load that the incandescent light
provides to the circuit. For instance if it is a 2W light running from 12V you
would use a 75 ohm resistor rated at for least 2W. (V*V/P = R : 12 * 12/2 = 72
ohms) You could also probably get away
with a higher value resistor as well. Experiment.
Dick Tasker
ashleysc@broadstripe.net wrote:
> Hi Tim and Charlie;
> It's a complicated world out there. I have an LED that works on 12 volts. Don't
know how that's accomplished, but Charlie has a good point. Need to find the
intended voltage.
> Cheers! Stu.
>
>
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> *From: *"Charles Kuss" <chaskuss@yahoo.com>
> *To: *aeroelectric-list@matronics.com
> *Sent: *Sunday, March 22, 2020 4:14:55 AM
> *Subject: *Re: AeroElectric-List: Re: AeroElectric-List Digest: 2 Msgs - 03
>
> Tim,
> LEDs operate on 3 volts or less. You cannot Supply an LED with more than 5 volts
at the very maximum. Generally you have to install a resistor in the circuit
to drop the voltage down to a safe
> level for the LED. Bottom line is you've probably destroyed that LED.
>
> Charlie
>
> Sent from Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
> On Sun, Mar 22, 2020 at 1:50 AM, Tim Jennings
> <tjennings07@gmail.com> wrote:
>
> Hello. I have a SB1B-14 https://bandc.com/product/standby-alternator-controller-14v-homebuilt/
installed in my plane and previously used the supplied
12 volt incandescent bulb as the
> annunciator. I recently cut a new panel and installed a 12 volt LED bulb
in place of the incandescent one. For some reason the led does not light up.
There was 11.8 volts at the led bulb
> but it would not light up. On the bench power supply it lights up well
below 10 volts. Per the SB1B-14 product details "Note: low-voltage monitoring
and warning system designed for use with
> an incandescent lamp (supplied) only.". Is there a simple way to make
this work utilizing my led bulb on the panel? Maybe wire the led bulb in series
with the "hidden and out of sight"
> incandescent bulb behind the panel? Thanks for your input.
>
> --
> *- Tim Jennings*
>
>
Message 6
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03 |
Hi Dick;
As you explain, my (red) LED must have a resistor in series.
My other point was that mine had a pos. and neg. connection and wouldn't work if
hooked up backwards.
Cheers! Stu.
----- Original Message -----
From: "Dick Tasker" <dick@thetaskerfamily.com>
Sent: Sunday, March 22, 2020 8:46:48 AM
Subject: Re: AeroElectric-List: Re: AeroElectric-List Digest: 2 Msgs - 03
If you have an LED that works on 12V then it is an assembly that includes a resistor
in series with the actual LED. These can be designed for any arbitrary voltage
that is more than the minimum for the LED which is between 1.8 and 3.3
volts depending on the LED color. Just choose a resistor that limits the LED current
to less than the maximum rating at the desired voltage. For instance, with
a red LED, which runs drops 1.8V designed for a 10mA current would use a ohm
resistor. (V/I = R : (12-1.8)/.01 = 666 ohms) Of course resistors come in discrete
values so in this case you would probably use a 680 ohm resistor. One
would also have to calculate the power rating required for the resistor. (V*I
= P : (12-1.8)/.01 = 0.102). In this case just about any resistor you can buy
will work, but to be safe use a 1/4 watt rated resistor.
I may be wrong, but I seem to remember reading somewhere that the scheme you want
to use works if you put a resistor in parallel with the 12V LED that simulates
the load that the incandescent light provides to the circuit. For instance
if it is a 2W light running from 12V you would use a 75 ohm resistor rated at
for least 2W. (V*V/P = R : 12 * 12/2 = 72 ohms) You could also probably get away
with a higher value resistor as well. Experiment.
Dick Tasker
ashleysc@broadstripe.net wrote:
Hi Tim and Charlie;
It's a complicated world out there. I have an LED that works on 12 volts. Don't
know how that's accomplished, but Charlie has a good point. Need to find the
intended voltage.
Cheers! Stu.
----- Original Message -----
From: "Charles Kuss" <chaskuss@yahoo.com>
Sent: Sunday, March 22, 2020 4:14:55 AM
Subject: Re: AeroElectric-List: Re: AeroElectric-List Digest: 2 Msgs - 03
Tim,
LEDs operate on 3 volts or less. You cannot Supply an LED with more than 5 volts
at the very maximum. Generally you have to install a resistor in the circuit
to drop the voltage down to a safe level for the LED. Bottom line is you've probably
destroyed that LED.
Charlie
Sent from Yahoo Mail on Android
<blockquote>
On Sun, Mar 22, 2020 at 1:50 AM, Tim Jennings
<tjennings07@gmail.com> wrote:
<blockquote>
Hello. I have a SB1B-14 https://bandc.com/product/standby-alternator-controller-14v-homebuilt/
installed in my plane and previously used the supplied 12 volt
incandescent bulb as the annunciator. I recently cut a new panel and installed
a 12 volt LED bulb in place of the incandescent one. For some reason the led
does not light up. There was 11.8 volts at the led bulb but it would not light
up. On the bench power supply it lights up well below 10 volts. Per the SB1B-14
product details " Note: low-voltage monitoring and warning system designed
for use with an incandescent lamp (supplied) only. ". Is there a simple way to
make this work utilizing my led bulb on the panel? Maybe wire the led bulb in
series with the "hidden and out of sight" incandescent bulb behind the panel?
Thanks for your input.
--
- Tim Jennings
</blockquote>
</blockquote>
Message 7
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| Subject: | Re: AeroElectric-List Digest: 2 Msgs - 03/20/20 |
At 10:24 AM 3/22/2020, you wrote:
><john_s_bright@yahoo.com>
>
>Use an LED instead of incandescent volts warn light with B&C regulators.
>
>This from Aeroelectric files:
>
>http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg
>
Yes. The B&C controllers need TWO resistors to
orchestrate the incandescent to led conversion.
This is because the LS-1 has special circuitry
in the low volts warning circuit that causes
the warning light to glow if power to to the
control electronics is lost.
A 'sneak' current resistor inside the
controller is too small to cause an incandescent
lamp to glow but LEDs are happy to let
you know it's there.
This feature is an artifact of some fuzzy
thinking waaaayyy back when. We were doing
this on accessories I designed in the
80's
Actually, that feature could/should be removed
from the line of B&C products that included
it.
In the mean time, the schematic John cited
above is the work-around. I have updated
that drawing to show TWO configurations
for the conversion 1) DIY fabrication of
the LV WARN fixture using a rudimentary
LED bulb 2) incorporating an LED fixture
already fitted with the necessary resistor
for operation at your ship's system voltage.
Bob . . .
Message 8
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| Subject: | Re: Boost Your Marks Via Assignment Help Online Services |
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