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Motor Driver Shield L293D Duemilanove Mega U NO
L293D use 16 pin DIP package, its internal integration is bipolar H - bridge circuit.
This kind of bipolar pulse width method has many advantages, such as the current continuous, or micro current vibration when motor stops, which as a lubrication effect. It can eliminate the dead zone of static friction when positive and negative.
1 x Motor Drive Shield L293D