Hi FF:
Thanks for posting your insights
This is the guy I was talking about, My DIY FLS close up:
- Easy to build and fast response enough to keep an eye on the subtle changes from the tail pipe
And this is a waveform sample from the tail pipe:
- The red trace as you know is the channel B and represents the exhaust waveform, AC coupling.
Channel A is starter motor current
KInd regards and happy scoping
Dario