Banana Pi BPI Q-Car kit , support Micro:bit and BPI:bit , makecode ,webduino,arduino,micropython

sinovoip · September 15, 2020, 2:40am

Banana PI BPI Q-Car,which is a robot focusing on maker education.Compatible with Web:Bit(BPI: Bit) and Micro:Bit development boards.Small car body, highly integrated functions, plug and play, can quickly children’s attention, complete the quick start of graphics programming, cultivate independent thinking and logical thinking ability

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Key Features

support Micro:bit and PBI:bit(Web:bit)
support Makecode graphical programming(with micro:bit)，support Webduino graphical programming（with BPI:bit）,and it also support MicroPython arduino（Micro:bit/BPI:bit）
Compact body, strong integrity
N20 Miniature reducer
Infrared emission, infrared reception, line patrol, speed measurement, atmosphere lamp, I2C interface (support 3.3V and 5V), ultrasonic interface, buzzer, steering gear interface, needle row expansion port, expansion screw hole, etc…Fully functional, strong expansibility
Easy to use it.

BPI-Qcar + BPI:bit for arduino :

more please see wiki page, we will keep update on wiki .

http://wiki.banana-pi.org/BPI_Q-Car_kit

this kit support OEM&ODM ,OEM & ODM please contact :

[email protected]

sinovoip · September 15, 2020, 2:41am

sinovoip · January 12, 2021, 12:10pm

Banana Pi BPI-QCar STEAM education kit for Micro:bit and BPI:bit(Web:bit) review and how to use

online documents

http://wiki.banana-pi.org/Getting_Started_with_BPI-QCar

sinovoip · February 22, 2021, 8:10am

BPI-QCar with BPI:AI baord

BPI:AI wiki page:

http://wiki.banana-pi.org/BPI-AI

sinovoip · March 13, 2021, 3:59am

Banana Pi BPI-QCar STEAM education Car kti ，with Micro:bit and use makecode

sinovoip · March 17, 2021, 3:56am

easy to buy sample

welcome for OEM&ODM

sinovoip · March 17, 2021, 9:35am

BPI-QCar with Micro:bit via makecode : use microbit KeyA/B to control QCar :

demo code:

github.com

Wind-stormger/Q-car_docs/blob/main/DOCS/MakeCode programming, controlling Qcar with microbit button.md

# MakeCode编程：用micro:bit的按钮控制Q-Car

MakeCode图形编程对初学者是极其友好的，相较于（code）代码这样由抽象的字符组合来表达程序逻辑，图形化的（blocks）积木非常利于人从视觉上认知和了解程序的基本逻辑，这可以很大程度上减少人在接触编程时直觉感受到的阻碍，低门槛的入门加上平滑的难度进阶，再过渡到代码编程时就能自然的以从图形编程中学会的知识为逻辑基础，即可有效降低抵触心理，增强自我学习的信心。  

现在我们打开MakeCode，安装上Q-Car扩展积木，即可开始编写用于控制Qcar的程序。  
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/screenshot-makecode2.png" width="100%"></div>

在basic选项栏中，有一个“on start”积木，这是一个在主程序刚启动或复位时运行的事件处理程序，即启动和复位时就会立即执行它内部的程序。
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/screenshot-makecode4.png" width="25%"></div>

在input选项栏中，有一个“on button A pressed”积木，这是一个(event handler)事件处理程序，当指定的事件（按钮A被按过）发生时，就执行它内部的程序。
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/screenshot-makecode5.png" width="25%"></div>

将想要用的积木拖拽出来放置在编辑区即可使用。例如：
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/screenshot-makecode3.png" width="50%"></div>

从上图中可以很轻易了解程序中实现了什么功能，主程序刚启动或复位时，初始化Q-Car的电机（init the motor），有三个事件处理程序，在按钮A按下后，让Q-Car前进（Let the Q-Car go foward），在按钮B按下后，让Q-Car后退（Let the Q-Car go back），在按钮AB同时被按下后，让Q-Car停下（Let the Q-Car stop）。

没有任何（code）代码编程经验的人也能轻易通过积木之间的嵌套关系以及积木上直白的功能描述了解整个程序的逻辑。

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sinovoip · March 29, 2021, 10:44am

Banana Pi BPI-QCAR is controlled by ultrasonic range sensor with micro:bit use makecode

demo code :

github.com

Wind-stormger/Q-car_docs/blob/main/DOCS/MakeCode programming, controlling Qcar with ultrasonic.md

# MakeCode编程：用超声波测距传感器控制Q-Car

“声”在1个标准大气压和15℃的条件下传导速度约为340m/s。当一段声波从声源发出，到遇到障碍物被反射传回声源所在的位置，这段声波就经过了传播时间乘以声速乘以2的距离。  

通过对<kbd>[压电陶瓷](https://baike.baidu.com/item/%E5%8E%8B%E7%94%B5%E9%99%B6%E7%93%B7)</kbd>施加高频电信号发出<kbd>[超声波](https://baike.baidu.com/item/%E8%B6%85%E5%A3%B0%E6%B3%A2)</kbd>，再用另一块压电陶瓷接收反射回的超声波并转化为高频电信号，测得的两段电信号之间的时间差即为这段超声波的传播时间，进而可以计算出超声波发射源与障碍物之间的距离。

在Q-Car正面micro:bit插槽前方有一个2*4扩展槽，其中有“V,T,E,G”四个排针槽位对应从micro:bit的“3V,P13,P14,GND”引出
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/Q-car_front_view2.png" width="100%"></div>
可对应顺序连接HC-SR04超声波测距传感器的“VCC,Trig,Echo,GND”引脚。
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/HC-SR04.png" width="50%"></div>
Q-Car在MakeCode中的扩展积+木中有一个"read ultrasonic sensor(cm)"积木，可以用于读取超声波传感器所测得的其与前方物体之间的距离数值，单位可选厘米或英尺。
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/screenshot-makecode2.png" width="100%"></div>
此积木仅有读取数值的功能，所以需要将其赋值给一个“Variables”变量积木，或是如条件判断的比较积木等其他可嵌套进数值的积木中来使用。
<div align=center><img src="https://raw.githubusercontent.com/Wind-stormger/Q-car_docs/main/DOCS/picture/screenshot-makecode8.png" width="50%"></div>

在Loop选项栏中，有一个“while”循环积木，在不给它添加循环条件时，程序运行到这里就会开始无限循环执行其内部的积木。

在Logic选项栏中，有一个“if”条件积木，当满足我们添加在上面的判断条件时，其内部的积木会被执行一次。

利用这些即可设计一个利用超声波测距传感器控制Q-Car与前方障碍物保持一定距离的程序。

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