Hello All.
I have been struggling with the construction of a signal converter circuit, and I was wondering if anyone could give me some pointers. The intention of the circuit is to convert the pulse of a CDI ignition on a motorcycle into a good square-wave signal that an analog tachometer can pickup.
I followed the advice of someone who analyzed the system and built a passive adapter to stretch out the 40 microsecond pulse generated by the ignition coil. Below is the schematic they made:
I built this circuit with all of the correct components based on what I am seeing here, however I feel that maybe I have the orientation of the mosfet's incorrect or I am missing something about how this adapter is supposed to function. The tachometer should work with a square wave signal. Any advice or analysis on how I could correct this is greatly appreciated.
I have been struggling with the construction of a signal converter circuit, and I was wondering if anyone could give me some pointers. The intention of the circuit is to convert the pulse of a CDI ignition on a motorcycle into a good square-wave signal that an analog tachometer can pickup.
I followed the advice of someone who analyzed the system and built a passive adapter to stretch out the 40 microsecond pulse generated by the ignition coil. Below is the schematic they made:
I built this circuit with all of the correct components based on what I am seeing here, however I feel that maybe I have the orientation of the mosfet's incorrect or I am missing something about how this adapter is supposed to function. The tachometer should work with a square wave signal. Any advice or analysis on how I could correct this is greatly appreciated.