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Lightspeed III Ignition Advance on Skyview (Read 6987 times)
Jan 11th, 2015 at 2:59pm

Craig Bennett   Offline
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Hi All,

Has anyone with a LS configured their Skyview to display the amount of ignition advance as output on pin 3 of the LS output connector?

Any tips?

Craig
 
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Reply #1 - Jan 18th, 2015 at 8:57am

Vern-X   Offline
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I have the Electroair ignition and it uses the same voltage output for timing. I display it as PSI on my SkyView.

Vern

===============

sensor={
    id=ELECTROAIR TIMING METER
    function=PRESSURE
    pins=C37_P31 C37_PIN8 C37_PIN22
    name=TIMING
    name=DEGREE
    name=BTDC
    min_val=0
    max_val=40
    resolution=0
    round=1
    is_piecewise=0
    low_coeff={
        c_x4=0
        c_x3=0
        c_x2=0
        c_x1=100
        c_x0=0
        }
    low_resistance=NONE
    low2high_cross=0
    high_coeff={
        c_x4=0
        c_x3=0
        c_x2=0
        c_x1=0
        c_x0=0
        }
    high_resistance=NONE
    high2low_cross=0
    window=.1
    shift=5
    age=16
    }
« Last Edit: Jan 18th, 2015 at 9:58am by Vern-X »  
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Reply #2 - Jan 22nd, 2015 at 2:57pm

Craig Bennett   Offline
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Posts: 89
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Thanks for taking the time to respond Vern. 

If I'm reading your entry correctly it is dependent on 3 pins, is that correct?  If so, what are the outputs from your EI that are mapped to those 3 pins?

The Lightspeed only provides for a single output for Ignition Advance, MAP, and low voltage RPM.  Each output has an open shield that is only terminated at the Lightspeed connector, not to aircraft ground or the LCD display that they optionally provide to display these values.

I am getting MAP to display (with several inches of inaccuracy for some reason) but nothing at all on the Ignition Advance which leads me to wonder if the Dynon EMS requires the shielded side of the output as well.  It should be displaying ZERO before engine start.

Figure 3 on Page 44 of the Plasma 3 manual is the reference I am using in case you are so inclined to take a look.  If not, I certainly understand.   Smiley

Regards,
Craig
 
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Reply #3 - Jan 28th, 2015 at 9:26am

Craig Bennett   Offline
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Disregard.  Did some more reading on the subject and answered my own questions.   Smiley
 
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Reply #4 - Feb 26th, 2015 at 3:57am

HS-GMC   Offline
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Hi.
Does it have to be a Type C Enhanced Pin from EMS for Lightspeed Timing display or can I use the Type A General Pin I have available.
Already flying with the II+ system and mini sensor with flywheel ring fixed at 25 BTDC (not adjustable). Now using Mogas so want to retard to 22 BTDC using potentiometer.
Regards
Gary
 
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Reply #5 - Feb 27th, 2015 at 6:17am

mmarien   Offline
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Vern-X wrote on Jan 18th, 2015 at 8:57am:
I have the Electroair ignition and it uses the same voltage output for timing. I display it as PSI on my SkyView.

You can now suppress the units on the display so that the gauge just shows the name. In most cases that is all that is required and you don't really want the TIMING gauge to read in PSI. See the gauges below. Most just show the name.

...
 

Glasair II FT - o320 - P-Mags - EFII - MTV 3 Blade CS - VP-X - Single 10" Skyview - Stratux Dual Band - zooooom ...
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Reply #6 - Feb 27th, 2015 at 9:25am

Vern-X   Offline
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You can now suppress the units on the display so that the gauge just shows the name. In most cases that is all that is required and you don't really want the TIMING gauge to read in PSI. See the gauges below. Most just show the name.don't really want the TIMING gauge to read in PSI. See the gauges below. Most just show the name.

... so what am I missing... did Dynon update the sensor definitions to include non-units?


 
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Reply #7 - Feb 27th, 2015 at 9:56am

Dynon Support   Offline
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Back in the 11.0 release notes:

Added: Ability to suppress the units (F, PSI, etc) on EMS widgets via EMS SETUP > SENSOR SETUP > [individual sensor settings]

You can do this for any sensor you want and it's nor part of the sensor config. If you really don't want your oil pressure to say OIL PSI but just OIL you could.
 

Please do not use Private Messaging on forum to contact. For private support:
Email: support at dynonavionics dot com
Phone: 425-402-0433 (7am-5pm Pacific weekdays)
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Reply #8 - Feb 27th, 2015 at 11:42am

mmarien   Offline
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Murray M.
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Vern-X wrote on Feb 27th, 2015 at 9:25am:
... so what am I missing... did Dynon update the sensor definitions to include non-units?

I think we asked for a none unit sensor definition but suppressing the units works just as well. Smiley Smiley
 

Glasair II FT - o320 - P-Mags - EFII - MTV 3 Blade CS - VP-X - Single 10" Skyview - Stratux Dual Band - zooooom ...
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Reply #9 - Mar 10th, 2015 at 7:01pm

Weasel   Offline
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Read all of http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1268164287/32#32

and all of http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1268164287

I have it working.  It took a while to get everything calibrated but was worth all the effort. It dataloggs Timing and the ignition derived MAP along with all the other parameters!

Attached is a timing map that I logged with the skyview Cheesy
 

Timing_Map.pdf (145 KB | 288 )
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Reply #10 - Jul 13th, 2016 at 7:40pm

DP   Offline
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Maybe I am being a dumba__, but is there some reason I cannot follow the above links regarding Weasels solution to getting the Lightspeed output mapped to the Dynon EMS?
 
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Reply #11 - Jul 13th, 2016 at 7:50pm

mmarien   Offline
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Murray M.
Saskatoon SK CAN

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Posts: 1140
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Glasair II FT - o320 - P-Mags - EFII - MTV 3 Blade CS - VP-X - Single 10" Skyview - Stratux Dual Band - zooooom ...
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Reply #12 - Jul 13th, 2016 at 8:55pm

DP   Offline
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THX Smiley
 
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Reply #13 - Sep 4th, 2016 at 6:17am

Weasel   Offline
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The input seems to read the timing very well even if it is a low voltage output.

Attached is a plot of Timing, MAP, RPM, and DALT.

Note the Timing Pressure reading is actualy degrees of timing BTDC due to labeling constraints on the Dynon system.

I have checked the calibration of the Timing referance across the range with a timing light.

...
 
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Reply #14 - Feb 20th, 2018 at 11:56am

jacktunnell   Offline
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I'm having trouble with this also.  I'm using a Lightspeed L2e signal box to send timing info from both Lightspeed boxes to the Skyview EMS.  I'm using EMS pins 22 & 23 configured as pressure with the 0-80 psi selection.  The output from the signal box is 0.1v per degree of advance.  2.5v = 25 degrees.
I need help with the set-up please.
 
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Reply #15 - Feb 21st, 2018 at 9:39am

jacktunnell   Offline
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Been studying and have more questions.

I copied this segment from the voltage segment for C37, Pins 1 & 2

All I did was to change the id, pins, names, and min max values.

Do I just add this in line in the existing sensor config file?

Will the following code, lines, instructions, whatever work for my 0v to 5v output from my Lightspeed L2e output.  The output is 0.1v per degree so 2.5v = 25 degrees BTDC.

0v-5v  or  0 degrees-50 degrees - - Which is the native unit value?

sensor={
     id=Lightspeed L2e Timing Output 0-5v
     ;VERIFIED POLY, FILTER?
     function=VOLTS
     pins=C37_P22 C37_P23
     name=1 BTDC
     name=2 BTDC
     name=1 TMNG
     name=2 TMNG
     min_val=0.0
     max_val=5.0
     resolution=1
     round=.1
     is_piecewise=0
     low_coeff={
           c_x4=0
           c_x3=0
           c_x2=0
           c_x1=1
           c_x0=0
           }
     low_resistance=NONE
     low2high_cross=0
     high_coeff={
           c_x4=0
           c_x3=0
           c_x2=0
           c_x1=0
           c_x0=0
           }
     high_resistance=NONE
     high2low_cross=0
     window=.2
     shift=3
     age=16
     }
 
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Reply #16 - Mar 2nd, 2018 at 1:21pm

mmarien   Offline
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Murray M.
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Posts: 1140
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Yes. Add it to the SFG file and load it into SV.

If you want 2.5v to equal 25 BTDC (10x) then c_x1=1 needs to be c_x1=10

Also you need to increase the max_val=5.0 to max_val=50.0

For some reason (I can't remember) PRESSURE works better than VOLTS. See Vern definition above. You would just have to change the id= and c_x1=100 needs to be c_x1=10 for his to work for you.
 

Glasair II FT - o320 - P-Mags - EFII - MTV 3 Blade CS - VP-X - Single 10" Skyview - Stratux Dual Band - zooooom ...
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