We are a couple of students entering our country's top science exhibition. Our project is on refreshable braille technology. We've been using GPIO pins to test our software out on LEDs but we understand upscaling to servo motors could be a challenge.
If I understand correctly, GPIO pins can only output upto 16maH, which is definitely not suitable for our motors. We researched into relays and seems they too aren't quite the solution but we are not sure.
If anybody had any advice on this it would be greatly appreciated. We know there many articles on this topic online but we fel it would be better if we could speak to someone about our situation in particular.