I've found many schematics on how to do variable frequency drivers, but they all are based on driving one coil at a set pulse until you change capacitance/resistance on a 555 timer. How would you make a driver that would increase ignition frequency as the engine picks up speed? I'm looking to electronically change the timing on a lawnmower engine and get rid of the flywheel timing altogether.
Any help on this would be great!Does anyone know how to build an ignition coil driver that is variable with engine rpm?
Usually they use a power transistor to switch the primary coil windings,and use a pick up coil/hall effect switch attached to the crank, to trigger the transistor, making it RPM controlled. But it makes a constant power supply necessary, ie a battery.Does anyone know how to build an ignition coil driver that is variable with engine rpm?
any magnetic pick up would work,wont matter how you %26quot;drive the %26quot; frequency if it cant tell shaft speed
