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Robotistan
Product Code
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13434
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The Motor Shield for Arduino® is a full-bridge motor driver based on the L298 motor driver IC.
It can drive two separate 2A DC motors or one 2A stepper motor. You can control the speed and direction of the motors independently of each other.
In addition, there are 6 connectors on the board connected to the Arduino® analog pins for rapid prototyping. Using the buzzer on the board, signals can be given in desired situations.
Important Note: To prevent a short circuit between the motor terminal on the driver and the Arduino® USB socket, the stackable headers sent within the product must be plugged into the driver board. In this way, the driver board will be elevated and a short circuit will be prevented.
SMD L298 Dual Motor Driver Shield for Arduino must only be powered via an external source.
This is because the L298 IC has 2 separate power connections, one for logic and the other for motor supply. The required motor current will mostly exceed the maximum current the USB can provide.
External supply can be provided with an adapter or a battery. The adapter can be connected from the 2.1mm center-positive power socket on the development board or from the VMS and GND terminals on the driver, paying attention to polarity. However, it is always recommended to supply power from the terminal on the driver. This is because when powered from the power socket on the development board, the current drawn by the motors will pass through the board and reach the driver. Since the Arduino® is designed to allow a maximum of 1A current through the Vin line, the Arduino® board may be damaged at currents higher than 1A. Therefore, external power should always be provided from the terminal on the driver.
The VMS terminal on the driver is also connected to the Arduino® Vin pin via a header. That is, when the power connection is made through the terminal, the Arduino® will also take its power through the Vin pin and reduce it to 5V with its own regulator. This way, you do not need to use 2 separate power supplies. However, as you know, the Vin pin on the Arduino® accepts an input between 7V-12V. In this case, if a voltage between 5V-7V is supplied to the driver board, the Arduino® board will not work properly because this voltage range is lower than the minimum values of the regulator on the Arduino®. To prevent this situation, there is an "OPT" jumper on the driver board. This jumper connects the VMS terminal on the driver with the Arduino® Vin pin. If a voltage between 5V-7V is to be supplied to the driver, this jumper is removed. In this way, the driver VMS and the Arduino® Vin are separated from each other, and the operation of the Arduino® is also ensured by giving an external 5V to the Arduino® from the outside. Later, this jumper can be placed back to its original state on the board. If the driver is to be fed with a voltage between 7V-12V, the board can be used by leaving the jumper as it is.
The Motor shield has two independent channels named A and B. Each of these channels is controlled by 2 Arduino® pins. A total of 4 pins are used by the shield. These channels can be used separately to drive 2 separate DC motors or used together to drive 1 unipolar or bipolar stepper motor. Pin D12 for channel A and pin D13 for channel B are used as direction determination pins. Pins D10 (channel A) and D11 (channel B) are used to adjust the motor speed.
There is a buzzer connected to the D4 pin. In this way, you can add functions such as a warning sound directly to your project without requiring external wiring.
Additionally, there is a header connected to the D9 pin where a servo motor connection can be made.
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