Yesterday we put the flexible plastic tube to isolate the inner metallic tube from the axis on our power transmission (see this post ). With the help of Karim, Sibille and me devised a way to test if power gets across our ball bearings using some large resistors. We were able to see that we can transmit 30 amps, but the resistors’s resistance was too low for proper testing, so we could not test the voltage drop.
It is crucial for us to test the voltage drop, since right now we are transmitting 5V through the ball bearings and powering devices that function on 5V on the rotating part. If the voltage drop is too high, we will need to add a 5V regulator on the main board.
We ordered some new resistors, and will keep you updated for the second test.