You can set the GPIO output drive level from 2 to 16 mA. Several libraries have facilities for this but how do I do it directly from the terminal?
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1For posterity: Beware this does not set the actual current (or control the maximum). It sets the safe maximum that can be driven. It will not prevent more than that being sunk or sourced, which may cause permanent damage. – goldilocks♦ May 15 '17 at 16:02
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