So first up I may have posted this in the wrong place. I am just not sure where the question should be asked.
So here is the question.
In checking the log on a rebuild of a machine I crashed. One of the things I have been paying attention to is VCC. I want to make sure that the FC is getting the power it needs. According to everything I have read and all the power modules I have ever had. 5.3 volts is the magic number. So I am taking great pains to make sure the fc is getting what it needs.
So today I pull the log after doing the first armed test and one thing I check is vcc. Much to my surprise. This is what I see
Now I checked the input voltage and found it was actually 5.1 volts and bouncing when the GPS is attached…I suspect thats due to it having an I2C external LED on it so as it flashes it’s causing some voltage fluctuations.
If I unplug the GPS the voltage remains steady at 5.1…so I know I need to tweak it to 5.3…that I can fix.
I should note that the gps and fc are on the same bec…but the gps is not powered through the fc. I needed to ensure the GPS and the FC had redundant power but not power it through the fc.
So what I don’t understand is why do I see a VCC with a mean average of 4.84…if 5.1 is going in.???
Is the voltage measurement in someway firmware controlled…I am puzzled by this.