Arduino Motor Shield L293D

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Arduino Motor Shield L293D với bộ thư viện tích hợp sẵn giúp cho việc điều khiển các loại motor DC, RC Servo, Step trở nên dễ dàng hơn bao giờ hết, Board có thể điều khiển 2 động cơ RC servo, 4 động cơ DC hoặc 2 động cơ Step đồng thời, công suất mỗi cầu H của board tối đa là 1A, chi tiết thêm xin đọc phần tiếng Anh bên dưới:

The Adafruit Motor Shield is a very useful shield with standard components.

It contains two L293D motor drivers and one 74HC595 shift register. The shift register expands 3 pins of the Arduino to 8 pins to control the direction for the motor drivers. The output enable of the L293D is directly connected to PWM outputs of the Arduino.

The tutorial of LadyAda explains the use of the Adafruit Motor Shield:
There is even a library with automatic accelleration and decelleration for stepper motors !
Be sure to check the menu of the tutorial on the left. The "Use it!" sections explains that "piggyback" is possible.

Piggyback is soldering one or two or three extra L293D drivers on top of the L293D drivers on the board to increase the maximum current. The L293D allows parallel operation.

There is also extensive explantion about what kind of motors can be used on the Adafruit forum:

The Adafruit Motor Shield is able to drive 2 servo motors, and has 8 half-bridge outputs for 2 stepper motors or 4 full H-bridge motor outputs or 8 half-bridge drivers, or a combination.

The servo motors use the +5V of the Arduino board. The voltage regulator on the Arduino board could get hot. To avoid this, the newer Adafruit Motor Shields have connection points for a seperate +5V for the servo motors.

For other programs and motor programs, see the Physcial/Mechanical-section in the Playground index.

Quick start

Supply the power either through the Arduino Board or the on the power header of the Adafruit Motor Shield. Only if the Arduino Board and the Shield use a seperate power supply, the jumper must be removed.

Load the sketch below in Arduino (the sketch is not for stepper motors) and follow the example in the sketch to drive your DC-motors or solenoids or lights.