Confirmation of USB charge accuracy.

[SSV]

Here is some confirmation data of dna200 USB charge accuracies.  The current source is a simple PSU set to 5v.  I can confirm linear scaling in the charge current as the voltage is reduced.....the oscillogram is of the USB data lines (floating) int a FET probe, on the LeCroy.  I repeated numerous fault conditions in both the data and power lines and there was no erratic behavior to mention.  Current always capped out at around 1 amp.  Shorting data lines lead to no erratic current spikes either.  The discrepancy between OSD and DMM is USB cable losses.  I purposely used the lowest quality USB cable I could find, so 20/30mA losses along the cable seems about right.  Hope this information is useful for some.  At the least it shows a large degree of confidence in evolv dna200 USB charge capabilities and controller......kudos evolv for building some decent BMS.....