P3 Keyboard current available through USB

[w4sc-2]

Looking for the specified current that can be supplied through the keyboard USB connector.  USB2.0 spec says 500ma.  What current (ma) is available from P3?  Is it limited to a lower value through a current monitor / switch?

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[Alan Bloom]

The P3 SVGA USB connector is intended for a keyboard or memory stick,
which are low-power devices.  For that reason, the current is limited to
a single unit load = 100 mA (x 5V = 1/2 watt).

Alan N1AL


On 7/2/19 9:00 AM, w4sc wrote:

> Looking for the specified current that can be supplied through the keyboard USB connector.  USB2.0 spec says 500ma.  What current (ma) is available from P3?  Is it limited to a lower value through a current monitor / switch?
>
> Sent from Mail for Windows 10
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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