![]() Most keyboards only draw a small handful of mA, even them hitting 50 would be rare (unless they are backlit). I believe the USB host makes a request to the keyboard which then just returns the state of a small multiplexer formatted correctly, specifically on USB it is limited to just 5 keys. A gamepad has alot more logic going on reading the thumbstick pots etc, how they hit 400mA is beyond me though, seems more likely that the sticker on wired controllers should have been on the wireless ones.Ī) get a powered USB hub, its basically a necessity for the pi.ī) get a powered USB cable. They look like regular USB cables but have 2 connectors, one for data and one for power, you connect data to the pi, power to something like a phone or ipod charger (any mains adaptor with a USB port on it). You may need another adaptor to convert whatever connector the cable has to be a USB socket to connect to controller too.
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