Feature #5063
Allow un-powered operation
20%
Description
Right now, the OpenVizsla always needs to be powered. As soon as power is removed, the communication between host and device breaks down. We received reports that a simple diode can be added at one location in the design to prevenr this problem from happening.
Let's analyze this in detail and decide if the diode change can be applied to "master", or if we have to look for something more sophisticated, avoiding the voltage drop over a diode.
Related issues
History
#1 Updated by mschramm about 1 month ago
- Status changed from New to In Progress
- % Done changed from 0 to 10
Unfortunately no real news here yet. - We got an image showing a hand-soldered patch wire from nework "+5V" behind L2 connecting to "targetVBUS" - but no diode visible so far, maybe it's in series to L2 on the (non-imaged) PCBA top side. So this all looks like the unit is powered from the host all the time...? We'll inquire again.
#4 Updated by mschramm 28 days ago
- % Done changed from 10 to 20
We're going to merge the other solved design improvements and not wait for further details regarding this user requirement. - They came up with another 'problem' (not further specified) which they also solved with a diode, - but no schematics on either detail yet, maybe next week.
#5 Updated by mschramm 16 days ago
- Related to Feature #5076: Update board revision added
