1st I need to say thanx to all of you who pointed me along the correct path to building a 339 based starter circuit for a Briggs motor. At whatever tenths of battery discharge I set, the 339 kicks, fwd biases a transistor, click goes the relay, and that little motor whirs right up! Very cool.
But now I gotta figure out a way to shut it off ....
There's a big ol' magnet on the flywheel for the ignition that should trigger a hall effect. Mouser has a OHS3177U that seems appropriate, but again, I don't really have a clue .....
And then I'll need some way to count or otherwise quantify the resulting pulse train. Possibly a clock of some kind to compare to? Any output over the zener will shut the 339 down.
But as you can see, I'm fumbling in the dark here!
So if anyone can give me some pointers towards the light I'll hit the ground running. Thanx in advance.
SP
But now I gotta figure out a way to shut it off ....
There's a big ol' magnet on the flywheel for the ignition that should trigger a hall effect. Mouser has a OHS3177U that seems appropriate, but again, I don't really have a clue .....
And then I'll need some way to count or otherwise quantify the resulting pulse train. Possibly a clock of some kind to compare to? Any output over the zener will shut the 339 down.
But as you can see, I'm fumbling in the dark here!
So if anyone can give me some pointers towards the light I'll hit the ground running. Thanx in advance.
SP