Ok guys,
Just got an powered external USB hub (Trust) and it worked immediately!
So, it must be very sensitive on the voltage (4.96V to low).
Now I have to find a way to tap 5 real volts from the asus eee pc. The
system must be able to work without (220V) power being plugged in.
I have seen some pictures with 5 Volt points (really 5 V?) of people
building in all kinds of devices.
Suggestions are welcome.
Anyhow, many thanks for your help determining the cause of the problem!
Regards,
Wim
Dave Higton wrote:
> Wim de Vries wrote:
>
>
>>> Hi,
>>> whilst, as Dave Higton pointed out, that Voltage is within
>>> spec, it is possible that your CDC device is not.
>>>
>>> Have you measured the current drawn on your three machines?
>>>
>> mmm, I am not very familiar with measuring devices. I know
>> how to measure
>> the voltage.
>> For the current I placed the meter in serial on the 5+V wire...
>> All three gave 30-40 mA, as I understand it...
>>
>
> That's the way to do it. Your results show that the device
> consumes a fairly low current, so it shouldn't be a problem.
>
> Dave
>
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