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Specification
- Power supply voltage:5 V to12 V
- Controller: L298P
- Number of engines supported: 2
- Maximum current per channel: 2 A
- Current measurement capability
Description
The module allows you to control two DC motors using Arduino sets. The system allows to adjust direction and speed of DC motors with current consumption up to 2 A. It also has the ability to quickly stop and measure the current drawn by the connected motors.
This version of Arduino Motor Shield is delivered in a large, decorative box with a mini Arduino poster inside.
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In order not to damage the computer port and Arduino module by consuming relatively high power by the motors, the USB power line has been separated from the power of the motors themselves. The manufacturer recommends connecting an external power supply. For this purpose, a DC adapter or any battery can be used. The user can also power the Arduino module and Motor Shield cover separately. For this purpose, disconnect the Vin Connect jumper, located on the back of the board. It is recommended in case of supply voltage higher than 12V.
Power supply jumper of the Motor Shield cover. The default is Vin Connect (left). To separate the power supply, the connection must be interrupted (following the red line in the figure on the right).
Inputs/Inputs
The overlay operates on the basis of a two-channel L298 motor controller. This means that the user is able to connect two motors, with a maximum current consumption of 2A each. Shield uses 8 Arduino outputs:
| Function | Pins of channel A | Pins of channel B |
|---|---|---|
| Direction | D12 | D13 |
| PWM | D3 | D11 |
| Braking | D9 | D8 |
| Current measurement |
A0 |
A1 |
If the brake or current measurement function is not used, outputs D9, D8, A0 and A1 can still be used as a general purpose output/input. To do so, break the jumpers on the bottom of the Motor Shield cover:
- BRAKE A - disconnection disables the braking option of the motor connected to channel A and releases pin D9
- BRAKE B - disconnection disables the braking option of the motor connected to channel B, and releases pin D11
- SNS 0 - disconnection disables the current measurement option for the motor connected to channel A and releases pin A0
- SNS 1 - disconnection disables the current measurement option for the motor connected to channel B, and releases pin A1
Jumpers connected by default. Braking and current measurement possible.
To deactivate the braking and current measurement option and use the outputs as general inputs/outputs, break the connections according to the red line in the above figure.
Connecting motors
The motors must be connected to the ARK type connector on the left-hand bottom of the cap. The connectors are very practical, allowing any cable to be mounted by screwing it in with ascrewdriver. The way we connect the motor leads determines in which direction it will turn when properly controlled.
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