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Using Arduino / Motors, Mechanics, and Power / Interconnecting Grounds
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on: June 28, 2012, 10:32:19 am
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Hi, I want to control a stepper motor with a driver a4988 and arduino and I ask: I can connect the ground of the ATX power supply 12V to the arduino ground? because I have heard that is very important to connect GNDs of arduino with ATX power supply and ground of a4988.
It's that true?
Thanks.
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Using Arduino / Installation & Troubleshooting / Using resistances
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on: June 27, 2012, 08:26:01 am
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Hi, I'm begginer in electronic and I connected a dc motor and a led to digital pins in PWM mode of the arduino board without a resistance (I connceted them directly), I want to know if do that is damaging for the arduino board or only is bad for the Led or the motor that use 5v, for that I think that the motor don't need a resistance. It's true?
Thanks.
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