I gotta question that shunt.. That style is good for a lot of continuous current but it's a big and heavy block of copper. Why not a current transformer or hall effect sensor? Plenty of options that are tiny and lightweight. Or even just a much smaller shunt and stick it in the airflow. If you don't mind a bit of tinkering with making your own voltage drop table, consider putting sense lines to the batteries and the battery cables themselves become the shunt.
This is what I'm here for!! I'm not an expert, at all. I've previously looked into these options (excluding the sense lines, I've never heard of them) and what I found seemed like there wasn't anything in the consumer range that can measure up to 150ish amps accurately - I think what I read about hall effect sensors said they aren't good for sustained high amp loads? That's from memory so I'm sure it's wrong, please point me in the right direction! As it turns out the big block of copper helps balance the ESC and 1500mAh 2s battery (mass distribution is a huge topic of concern/focus for this craft in my mind) and ultimately optimizing for total mass/flight time is not the goal so I've put very little effort into finding a lighter-weight solution. I'm in the testing phase for a reason though, I knew from the beginning there was a decent chance I'd have to ground-up rebuild the frame.
Amazing project! Awaiting further development.
Nice project! Keep it up! 💪
Hey thanks!
I gotta question that shunt.. That style is good for a lot of continuous current but it's a big and heavy block of copper. Why not a current transformer or hall effect sensor? Plenty of options that are tiny and lightweight. Or even just a much smaller shunt and stick it in the airflow. If you don't mind a bit of tinkering with making your own voltage drop table, consider putting sense lines to the batteries and the battery cables themselves become the shunt.
This is what I'm here for!! I'm not an expert, at all. I've previously looked into these options (excluding the sense lines, I've never heard of them) and what I found seemed like there wasn't anything in the consumer range that can measure up to 150ish amps accurately - I think what I read about hall effect sensors said they aren't good for sustained high amp loads? That's from memory so I'm sure it's wrong, please point me in the right direction! As it turns out the big block of copper helps balance the ESC and 1500mAh 2s battery (mass distribution is a huge topic of concern/focus for this craft in my mind) and ultimately optimizing for total mass/flight time is not the goal so I've put very little effort into finding a lighter-weight solution. I'm in the testing phase for a reason though, I knew from the beginning there was a decent chance I'd have to ground-up rebuild the frame.