Well this is the problem, there is no guarantee that both MAF sensors would have the same airflow. Also if one filter was to become more restricted then the other, then that would throw it out of balance. Unfortunatly this won't work reliably.
I'll do some asking around and find out what the...
Ok, the MAF sensor outputs a 5V square wave signal of ~30Hz at idle rising to ~150Hz at WOT.
The MAF sensors output is 50% duty cycle.
Your example above makes the most sense to me and eliminates problems introduced by phase shift.
But your right, I need to find out if the ECU is rising...
I really don't know edmondng. Care to elaborate?
EDIT: Actually given the low frequency's I'm dealing with (30~150Hz) would it even be possible to filter out the original input frequencies?
What about a half adder? Would that work?
Hi everyone, first post so go easy :)
What I want to do is design a circuit to add two square wave frequencies into one output.
The use is for a vehicle fitted with a Karman Vortex mass airflow sensor.
The MAF sensor has a 5V square wave output of 0~150Hz.
The vehicle has been modified...