Introduction: Elecfreaks Motor:bit User Guide
ELECFREKAS Motor:bit is a kind of motor drive board based on micro:bit. It has integrated a motor drive chip TB6612, which can drive two DC motors with 1.2A max single channel current. Motor:bit has integrated Octopus series' sensor connectors. You can plug various sensors into it directly. Among these connectors, P0, P3-P7, P9-P10 support sensors with 3.3V power voltage only; P13-P16, P19-P20 support 3.3V or 5V sensors. You can change electric level by sliding the switch on the board.
Step 1: Hardware
- Motor Drive Chip: TB6612
- Support GVS-Octopus electric Bricks' connector
- Some GVS connectors support electric level switch between 3.3V and 5V.
- With 2 channels DC motor connectors, max single channel current is 1.2A.
- Input Voltage: DC 6-12V
- Dimension: 60.00mm X 60.10mm
- Weight: 30 g
Step 2: Application:
|Buzzer||Buzzer is controlled by P0.|
|LED COL||Micro:bit LED matrix control pin|
|VCC Switch||3.3V/5V electric level switch only for P13-P16, P19, P20.|
|Button-A||Micro:bit main board button A|
|SCK MISO MOSI||Hardware SPI pin -P13,P14,P15|
|SDA SCL||Hardware IIC pin -P19,P20|
|The power switch||External power switch|
|6-12V GND||External power connector|
|M1+ M1- M2+ M2-||Connector of two DC motor or one stepping motor.|
Step 3: Detailed Introduction of Some Connectors
1. VCC Switch-3.3V/5V electric level switch.
Slide switch to the end of 5V, the electric level of the blue pins (P13、P14、P15、P16、P19、P20) on motor:bit is 5V, and the voltage of the red power pins is 5V too. Similarly, when slide switch to 3.3V, the voltage of blue pins and red pins are 3.3V.
2. Digital Pin Connector.
Digital pins: P4、P5、P6、P7、P9、P10.
G-3V3-S connector: 3V3 stands for 3.3V power voltage, G is for GND, S is for signal. GVS is a standard sensor connector, which enables you to plug onto servos and various sensors conveniently. At the same time, it supports our Octopus Bricks series'products.
3. 3.3V/5V dual electric level GND-VCC-SIG connector：P13, P14, P15, P16, P19, P20.
The specialty of G-VCC-SIG connector lies in that it can support 3.3V or 5V power device by shifting electric level of 3.3V/ 5V through VCC connector. At the same time, it supports our Octopus Bricks series' products.
Motor Input Connector: Two motor input connectors in total. M1+, M1- and M2+, M2- separately controls a channel of DC motor.
M1，M2 Motor Control Instruction: P8 and P12 relatively controls the rotating direction of M1 and M2; P1 and P2 control motor speed.
Direction control of M1 Positive rotate under high voltage; negative rotate under low voltage.
Speed control of M1 PWM
Speed control of M2 PWM
Direction control of M2 Positive rotate under high voltage; negative rotate under low voltage.
Step 4: Dimension:
Please connect components according to the picture below:
Positive Rotation Of Motor:
P8 in high electric level means the positive rotation of motor. You can adjust the logic value of P1 to control motor speed.
Negative Rotation Of Motor:
P8 in low voltage level means the negative rotation of motor. ou can adjust the logic value of P1 to control motor speed.
If you need more cases about micro:bit, please keep watching our blogs posted on https://www.elecfreaks.com/blog.
Step 5: Relative Cases:
Step 6: Source
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