Doc Sprocket
*********
Howdy, y'all! (See, I am a Northern Redneck!
Anyhow, I've cooked a few braincells on the whole flywheel detonation thing. Some believe it, some don't. Doesn't really matter. Why? Other parts can fail. We all know (I hope) that it's a bad idea to free-rev an engine. But sometimes spit happens. Like a throttle sticking, throwing a chain, clutch failure, noobs riding your toys, whatever.
What I'm getting at here, is that I would very much like to see an electronic rev-limiter that can be applied to any one of our single-cylinder engines. It could be fixed to 5 or 6k RPM, or perhaps adjustable.
I know very well that there's a few of you around here that have a good understanding of electronic and IC circuitry. Surely one or more of you are capable of devising a basic electronic circuit capable of this. I don't know enough, but the concept seems clear:
Since the coil pulses once per revolution, all the circuit has to do is count pulses over time. If that count tries to exceed a predetermined number over a set time, the circuit grounds out the coil, disabling the spark until the RPM drop below that specified number.
This is not to debate whether it's necessary- This is to see if someone here can pull it off... Any takers? Kibble? Russ? Anybody else here know their way around a PCB?
Think about it- a little piece of mind for some, and they'd sell like frigging hotcakes to all the panic-prone masses!!!
Anyhow, I've cooked a few braincells on the whole flywheel detonation thing. Some believe it, some don't. Doesn't really matter. Why? Other parts can fail. We all know (I hope) that it's a bad idea to free-rev an engine. But sometimes spit happens. Like a throttle sticking, throwing a chain, clutch failure, noobs riding your toys, whatever.
What I'm getting at here, is that I would very much like to see an electronic rev-limiter that can be applied to any one of our single-cylinder engines. It could be fixed to 5 or 6k RPM, or perhaps adjustable.
I know very well that there's a few of you around here that have a good understanding of electronic and IC circuitry. Surely one or more of you are capable of devising a basic electronic circuit capable of this. I don't know enough, but the concept seems clear:
Since the coil pulses once per revolution, all the circuit has to do is count pulses over time. If that count tries to exceed a predetermined number over a set time, the circuit grounds out the coil, disabling the spark until the RPM drop below that specified number.
This is not to debate whether it's necessary- This is to see if someone here can pull it off... Any takers? Kibble? Russ? Anybody else here know their way around a PCB?
Think about it- a little piece of mind for some, and they'd sell like frigging hotcakes to all the panic-prone masses!!!
Yes, I'll give it a shot. I actually started getting some ideas as you were describing the requirements. 
