@mrwooster wrote:
New to this and learning step by step - on to batteries. Had a situation yesterday where the quad dropped out of the sky and pretty sure it was down to a flat battery. Really appreciate the help so far....
Questions
I have calibrated the voltage now by comparing missionplanner values to measurements taken with a multimeter - using a 3s 5200mah battery - what should be my failsafe trigger?
How do I calibrate the amperage (it seems very low). Voltage is easy because I can just measure across 2 terminals on the PD board, but for amperage I would have to connect up my multimeter as part of the circuit - is this the std way to do it? Also the amp draw appears to be calibrated as an amps per volt - this seems very hard to measure? Any tips?
Is it possible to add a buzzer alarm before the failsafe engages? E.g. buzzer at 35% power, failsafe at 15% power?
How is the % remaining calculated? Right now when the battery is flat, missionplanner is still claiming 80% remaining - assuming this is to do with the amperage calc being out?
Thanks!
G
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