Tried it with the relays and it works just fine on the test bench - can't get much simpler that 2 relays attached directly to the REV LIMIT output and 2 10R 10W resistors.
I'll draw some qualitative pics of what I saw with my 'scope on the coil -ve terminal later, with and without the resistors in place and link to them here - they're quite interesting...
I'm liking this a lot so far!
Just need a car to try it on (don't have a MJLJ'ed car since I sold it 3 weeks ago - but I extracted the MJLJ before it went) to ensure that there's no unexpected side effects
I'm confident that the solution kills any coil charging in progress without causing a spark, so maybe our originally perceived problem of premature sparks has been solved...?
Hard rev limit
Moderators: JeffC, rdoherty, stieg, brentp
I'll stick with David's
I'll stick with David's original thyristor rev limiter circuit. Why? Well, because you (only you) had a problem with it. AND, because you just let me know today you don't know how to open a file.
I don't find your argument, that David's circuit does not work, credible. As a matter of fact this raises the question, why would David post a non-functional circuit of a hard-cut rev limiter? It is more likely that the circuit is a little complex and hard to trouble shoot, and lacks sufficient documentation.
I don't find your argument, that David's circuit does not work, credible. As a matter of fact this raises the question, why would David post a non-functional circuit of a hard-cut rev limiter? It is more likely that the circuit is a little complex and hard to trouble shoot, and lacks sufficient documentation.