On Apr 13, 11:03*pm, Eric Greenwell wrote:
Dave Nadler wrote:
On Apr 13, 7:40 pm, Darryl *wrote:

I assume Dave's earlier comment about power consumption of USB to SD
card adapters referred to some of the larger desktop style ones, the
typical small SD to USB small adapters like my SanDisk MicroMate or
SimpleTech Bonzai draw very low currents. I don't have my USB breakout
cable handy or I'd measure the currents but I know it is low.

Darryl

I have a small converter that looks like a normal USB memory
stick, with a tiny slot in the end for a uSD card (I use this for
turning in FLARM log files). The combo (adapter plus uSD card)
draws *100ma, which is the max our adapter sources.

What it needs all that power for I have no idea...
Your mileage may vary !

Best Regards, Dave

PS: In windows device manager, switch to connection view,
and you can see the USB current for each connected device.
No need for breakout cables...

I opened Device Manager, located my USB memory stick in the USB
controller list, opened Properties, but don't see power or current
listed in any of the tabs. The Generic hub did have a Power tab, but it
showed the requirement for the attached device (auxiliary display), not
actual current. Can you be more specific on which USB to look at, and
where in the Properties?

--
Eric Greenwell - Washington State, USA (netto to net to email me)

- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarmhttp://tinyurl.com/yb3xywl

Start with "View by Connection".
Locate the USB hub controlling your device.
Look at properties, power tab...

This shows the max current negotiated (max to be provided
by USB host), not the instantaneous actual current.

Hope that helps,
Best Regards, Dave