Hello Decebel76,
I am not involved with the firmware myself, just a fellow Nano owner. I just wanted to say your english is pretty good,
honestly its not obvious english is not your native language in writing form anyways! I do think however you may have meant to say “if you can[size=150]t[/size] set a number of pulses to be generated, then [size=150]as[/size] a automotive tool used to verify injector balance [size=150]it[/size] become useless,…” ? Seems to make more sense that way, amazing how one “T” can invert the whole meaning of a sentence! Curious project you are envisioning, Using the nano to operate a fuel injector, I was thinking injectors were actuated with a more digital signal of one “on state” per injection of a varying length, rather than an “inverting variable frequency burst” per injection, Perhaps you have a product idea there, if that is added,you could produce a device ready to connect to the vehicle battery , injector terminals(maybe even a kit with various adapters) a hook for the Nano output and a place to put the ground clip and you have a pretty handy injector verifier. you could even include a regulator to power the nano through the usb port from the vehicle power. Then again maybe I am totally confused what you are trying to do and how it allow you to see a imbalance in the injectors.
I am pretty sure you are correct the frequency generator is consuming power all the time, even if there no output current just inverting the voltage against the micro-tiny capacitance of the output circuit has to be pulling some current.
Battery life can be limiting so that is a good suggestion too! Anyways, I hope that was helpful, Troy