I've had the same experience. After adding a 2.1A USB hub all of my keyboard/mouse/wifi problems went away. It seems that many (most? all??) USB devices will communicate with the host at "unit load" power levels but will do nothing more if not given the current required to perform their duties.itimpi wrote:I would not expect 1000mA to be enough to power a HD in addition to everything else as the HD by itself is likely to consume 500mA. It is possible that the WiFi dongle is also power hungry enough to exhale the total over the 1000mA limit. that of course is assuming the power adapter really delivers its rated value - many cheap ones do not. I have 2000mA power adapters (or better) for my hubs and thy can run this sort of mix of devices successfully.
I may be new but as long as you have a charger that has a micro usb plug and the voltage is on output of 5 volts and 1amp it will work. I tried a lower amp than 700 and it would not boot.geezbeez wrote:There's been a lot of info for RaspPI power supplies,
Following this I bought a NOKIA AC-10X which it seems had been verified by a number of Raspberry users as up to the job. I did this despite the fact the charger Id been using seemed fine up until I plugged in a WIFI dongle. Incidentally a Chinese ZTE travel charger STC-A220501700m5-b rated at 700ma, not sure what I got that charger from? A £10 mobile phone I think
Now getting a PSU that works with a Raspberry is pretty simple compared to a WIFI dongle.
My Wifi dongle still wont work even when the PI is powered by a PSU independently verified as good.
It would be most helpful if there was a list of wifi dongles including version numbers known to work with the base Debian or Arch `cut on a raspberry PI (without running rpi_update which could cause problems in itself) and that can be set up using the instructions available on raspberrypi.org.