Martyn wrote:Shunt resistor or current probe are the options. If using a resistor put this in the ground return path and you can use one channel of the scope and scaling the reading.
bennog wrote:You should use something in the range of 0.01 ohm or something like that.
At 40A the 0.01 ohm still has 0.4V over it ! This is still a 3% voltage drop for your motor so your motor will perform 3% less !
Simple and dirty way to do this, use the wires from the battery to the servo as a shunt.
You only have to figure out a way to calculate the current from the measured voltage.
If your charger has a current meter you can use the charge cycle to calculate the exact factor from V to A
skyflyer wrote:Hi Benno! Wouldn't have the cable too low resistance? I have a pretty good charger, so I'll be able to measure the the voltage drop over a constant current -- I'm just afraid I won't measure anything...
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