Nezha Breakout Board V2

Introduction

The Nezha Breakout Board V2 is a micro:bit expansion board designed for education and creative programming, aiming to stimulate students' innovative thinking and hands-on skills. It not only integrates two convenient motor control buttons and a 4-way motor driver, but also comes with an 8-way sensor expansion port, providing students with a versatile platform for experimentation and exploration. These motor control buttons allow direct control of the motor's direction of rotation without connecting the micro:bit, increasing flexibility of operation. All interfaces use RJ11 connectors with a dud-proof, anti-reverse plug design to ensure fast and accurate connections. The case of the expansion box is specially designed with interfaces that are compatible with LEGO and Fischertechnik building blocks, supporting students to combine electronic modules with mainstream building blocks to build personalised creative programming creations.

Characteristics

Independent Motor Control: Equipped with motor control buttons that allow students to directly control the direction of rotation of the motor without accessing the micro:bit, providing additional freedom of operation.

RJ11 port design: Adopting RJ11 connector, the design focuses on the anti-misplugging feature, which simplifies the wiring process and enhances the efficiency of classroom situaton.

Colour recognition system: The innovative colour recognition system provides students with an intuitive way of identifying and connecting the blocks through the port labels and sensor labels corresponding to the colours of the blocks, reducing the difficulty of learning.

Compatibility design: The LEGO and Fischertechnik structural components compatible interface on the shell not only enhances the versatility of the product, but also stimulates students' creativity and encourages them to explore the infinite possibilities of combining electronic technology with physical structures.

Slide Power Switch: The slide power switch requires a clear sliding action to switch the power state, reducing the risk of misuse due to accidental touch. It provides physical feedback to ensure that the user can confirm the state of the switch by touch and avoid uncertainty.

Technical Specification

Item	Parameter
Name	Nezha Breakout Board V2
SKU	EF02055
Dimension	L80mm（Not include the micro:bit）x W60mm x H44mm
GW	142g（Not include the micro:bit）
Charging Voltage	5V
Charging Current	3A
Charging Time	50min
Battery Capacity	1100mAh
Max. Working Voltage	8.4V
Rated Working Voltage	7.4V
Min. Working Voltage	6.4V
Standby Current	0.01A
micro:bit Supply Voltage	3.3V
Motor Output Working Voltage	6.4~8.4V
Motor Connection Rated Output Current	1A
Motor Connection Max. Output Current	2A
RJ11 Connection Output Voltage	3.3V
RJ11 Connection Output Max. Current	1.0A
Lasting Operation Time	45min（Connect the AI Lens, 4 Smart Motors, 2 LED modules, there might be some difference because of the testing enviornment and so on)
Motor Connectors	4 Units
Sensors Connectors	8 Units

Introduction to Main Modules

micro:bit Connector

Motor Control Buttons

The motor is controlled to rotate clockwise or anti-clockwise by the motor control buttons.

IIC Connections

Compatible with the colour recognition system of the PlanetX Sensors, with blue rectangular labels on the interfaces.

IO Ports

Compatible with the colour recognition system of the PlanetX sensors, with connectors for yellow rectangular labels(for analogue) or red rectangular labels(for digital).

Motor Connectors

The connectors have a red circular label.

Power Switch

Control the power on or off by toggling the power switch.

Charging Port

Type-C charging port, maximum support 5V 3A, charging time is about 50min.

Power Indicators

Power indicators are able to display the current battery level.

Indicate that the LED is always on

Indicate that the LED is off

Indicate that the LED is flashing

Discharging

Current Status	LED 1	LED 2	LED 3	LED 4	Battery Capacity
Discharging Status					76% ~ 100%
					51% ~ 75%
					26% ~ 50%
					1% ~ 25%

Charging

Current Status	LED 1	LED 2	LED 3	LED 4	Battery Capacity
Charging Status					100%
					75% ~ 99%
					50% ~ 74%
					26% ~ 49%
					0% ~ 25%

1. Connect the power supply after the power is off.
2. The power indicator light will show the current power level and blink in charging state.
3. When fully charged, the power indicator lights are all lit, please disconnect the power supply to complete the charging.

Add Extensions

For programming Nezha Breakout board V2, we need to add an extension. Click "Extensions" in the MakeCode drawer to see more choices.

Search with "https://github.com/DeXin64/pxt-nezha2.git" and have it downloaded.

Note: If you get a prompt that some codebase will be removed for incompatibility, you can either follow the prompt and continue, or create a new project.

Operation Methods

Hardware Connections

Connect the PlanetX Smart Brick Motor to the Motor A connector on Nezha Breakout Board V2 as the diagram suggests.

Sample Code

Take the current position as the zero point and run 180 degrees clockwise

Link:

Link: https://makecode.microbit.org/_E6vawDM7yX87

You may also download it directly below:

Result

The motor connected to port A rotates 180° clockwise when button A is pressed.

The servo turns to the preset zero position and runs 180 degrees in a clockwise direction

Link

Link: https://makecode.microbit.org/_1w9VLsEE8fdi

You may also download it directly below:

Result

The motor connected to port A automatically rotates to the preset zero position when button A is pressed, and the motor connected to port A rotates 180° clockwise when button B is pressed.

Set the rotation speed of the motor and control the motor to start or stop

Link

Link https://makecode.microbit.org/_fdiPdcJ71f4X

You may download it directly below:

Result

Set the motor rotation speed and control the motor to start or stop via A and B buttons.

Get the rotation angles

Link

Link: https://makecode.microbit.org/_Axw3drgX6Y3V

You may also download it directly:

Result

After turning on the power, press the button A to control the motor to rotate for 3 seconds, and then display the current angle value.

Get the rotation speed (Laps/Seconds)

Link

Link: https://makecode.microbit.org/_01x60dRX9Ros

You may download it directly below:

Result

After powering on, the motor starts turnning and the micro:bit displays the current rotation speed (Laps/Seconds).

Get the version number of the hardware

Link

Link: https://makecode.microbit.org/_V0tJ15dkhLVq

You may download it directly below:

Result

The micro:bit displays the current hardware version number after powering on.

Python Programming

Step 1

Download the package and unzip it:EF_Produce_MicroPython-master

Open Python editor

For programming, we need to add the file of Nezha_V2.py. Click Project and click open, select Nezha_V2.py.

Set to Add file Nezha_V2.py and confirm Motor.

Step 2

Program

from microbit import *
from Nezha_V2 import *

nezha_v2 = NEZHA_V2()

while True:
    if button_a.was_pressed():
        nezha_v2.Motorspeed(motor.A,direction.clockwise,100,MotorFunction.degrees)
    if button_b.was_pressed():
        nezha_v2.Motorspeed(motor.A,direction.counterclockwise,100,MotorFunction.degrees)

Result

The motor is controlled to rotate 100 degrees clockwise or anti-clockwise by the A and B buttons.

Program

from microbit import *
from Nezha_V2 import *

aaa = NEZHA_V2()

while True:
    if button_a.was_pressed():
        aaa.goToAbsolutePosition(motor.A,modePostion.clockwise,100)
    if button_b.was_pressed():
        aaa.goToAbsolutePosition(motor.A,modePostion.clockwise,-100)

Result

With the current position as the zero point, the motor is controlled to rotate to 100 degrees or -100 degrees by the A and B buttons.

Program

from microbit import *
from Nezha_V2 import *

aaa = NEZHA_V2()

while True:
    if button_a.was_pressed():
        aaa.nezha2MotorStart(motor.A,direction.clockwise)
    if button_b.was_pressed():
        aaa.nezha2MotorStart(motor.A,direction.counterclockwise)
    if pin_logo.is_touched():
        aaa.nezha2MotorStop(motor.A)

Result

The motor is controlled to rotate clockwise or anti-clockwise by the A and B buttons and stopped by touching the logo on the micro:bit.

Program

from microbit import *
from Nezha_V2 import *

aaa = NEZHA_V2()

while True:
    if button_a.was_pressed():
        aaa.nezha2MotorSpeedCtrolExport(motor.A,100)
    if button_b.was_pressed():
        aaa.nezha2MotorSpeedCtrolExport(motor.A,-100)
    if pin_logo.is_touched():
        aaa.nezha2MotorStop(motor.A)

Result

Use the A and B buttons to control the motor to rotate at a specified speed, and touch the logo on the micro:bit to stop it.

Program

from microbit import *
from Nezha_V2 import *

aaa = NEZHA_V2()

while True:
    if button_a.was_pressed():
        aaa.Motorspeed(motor.A,direction.clockwise,100,MotorFunction.degrees)
    if button_b.was_pressed():
        aaa.Motorspeed(motor.A,direction.counterclockwise,100,MotorFunction.degrees)
    if pin_logo.is_touched():
        display.show(aaa.readServoAbsolutePostion(motor.A))

Result

Use the A and B buttons to control the motor to rotate at a specified angle, and touch the logo on the micro:bit to display the current angle value.

Program

from microbit import *
from Nezha_V2 import *

aaa = NEZHA_V2()

while True:
    if button_a.was_pressed():
        aaa.nezha2MotorSpeedCtrolExport(motor.A,100)
    if button_b.was_pressed():
        aaa.nezha2MotorSpeedCtrolExport(motor.A,-100)
    if pin_logo.is_touched():
        display.show(aaa.readServoAbsoluteSpeed(motor.A))

Result

Use the A and B buttons to control the motor to rotate clockwise or counterclockwise. Touch the logo on the micro:bit to display the current motor rotation speed (laps/seconds).

Program

from microbit import *
from Nezha_V2 import *

aaa = NEZHA_V2()

while True:
    if button_a.was_pressed():
        aaa.Motorspeed(motor.A,direction.clockwise,100,MotorFunction.degrees)
    if button_b.was_pressed():
        aaa.Motorspeed(motor.A,direction.counterclockwise,100,MotorFunction.degrees)
    if pin_logo.is_touched():
        aaa.servoPostionReset(motor.A)

Result

Use the A and B buttons to control the motor to rotate 100 degrees clockwise or counterclockwise. Touch the logo on the micro:bit to control the motor to rotate to the preset zero position.