Home-brew battery measuring station

[BrianG]

Sikes: Like J57ltr said, 3 x 56 ohms is not nearly low enough. My design called for between 30 x 3 ohm resistors in parallel (0.1 ohm total), and 60 x 3 ohm resistors in parallel (0.05 ohm total). Each being rated for 50w and mounted on a heatsink, would be enough to dissipate the power.

J57ltr: Since the MMM is a BL ESC, there are no braking FETs. I imagine braking in brushed mode is done the same basic way as it is in BL mode; use PWM to short the phases, and in between the PWM pulses, put the inductive energy back into the battery. Although, you can disable the brakes in the ESC when used in this way, so it wouldn't matter either way.

[whitrzac]

I was just thinking about this last night at the track.

rather than making your own, use 4ish of these and an egaletree in live mode. it seems too simple to work though