![]() The simple rule is that the PI is only compatible with units that state implicitly in their documentation that they use less than 100mA, such units are simple wired (and sometimes but not always wireless) keyboards and mice. The exception are official <100mA devices (AKA "single current unit devices", not to be mixed up with units actually drawing less than 100mA, yes I know its confusing ). The problem is that the fuse will "eat" a large portion of the 5V, so for many USB devices there won't be enough left. ![]() ![]() Repeating characters could be a software problem (too) but a keyboard that wants more than 100mA might not be compatible with the PI, and there are more reasons for that than just that the PI is fused at 140mA
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