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L2E "Timing Advance" settings

Posted: Sun Mar 30, 2025 5:35 pm
by tweetr
What are the correct settings for Aux Scale Factor and Aux Offset for Timing Advance using the L2E interface on my Lightspeed Engineering Plasma III ignition? According to the L2E documentation:

"The L2e outputs a 0-5 volt signal to be connected to a compatible input on your EFIS engine monitor.
Scale your EFIS as specified below:
Timing Advance: 0.1 volts per degree of advance (example: 2.5 volts = 25 degrees of advance)"

Thus I need to scale the Aux Input to show 0 - 46 degrees of timing advance from an input of 0 - 4.6 volts.

Thanks!

Re: L2E "Timing Advance" settings

Posted: Thu Apr 03, 2025 11:32 pm
by GRT_Jeff
For timing advance, a scale factor of 25 with offset zero, forwarded sensing, Integer follows their example: 2.5V would show as 25. If it can do fractions of a degree and you wanted a decimal point you would use a scale factor of 250 in Decimal mode to get 2.5V showing as 25.0.

Re: L2E "Timing Advance" settings

Posted: Sat Apr 05, 2025 9:26 pm
by tweetr
I'll go input those settings today. Thanks!

Re: L2E "Timing Advance" settings

Posted: Sat Apr 05, 2025 10:11 pm
by tweetr
I made those changes.
SF = 25
Offset = 0
Sensing = Forward
Integer

As soon as this rain stops I'll go fly it and check the results!

Re: L2E "Timing Advance" settings

Posted: Mon Apr 07, 2025 2:28 pm
by tweetr
That worked. Timing advance is displaying correctly. Thanks!