查看Micro:Bit Valon-I en的源代码

[[Image:Valon_microbit_logo.png |400px|thumb|Valon-I Microbit]]

== Programmable educational robot Valon-I ==

Valon-I is a programmable robot designed for maker education.

<font size="+1">'''Official way to buy: [http://yfanmcu.taobao.com/ Enterprise Store],[https://item.taobao.com/item.htm?id=635543331286 Valon-I for Micro:Bit]'''</font>


Valon-I installation video: 

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== Introduction ==

Valon-I is a programmable robot specially designed for maker education. It supports multiple programming environments such as MakeCode, Scratch and Python; it has the advantages of flexibility and exquisiteness, simple installation, easy to use, etc., and a variety of interesting functions, which can cultivate and develop children's logical thinking ability in a relaxed and happy situation, and it is helpful To increase interest in learning.

Valon-I intelligent robot, equipped with N20 all-metal high-quality micro geared motor, power indicator LED, programmable LED/buzzer, motor drive system, lithium battery power supply system, one-button switch start, line tracking sensor, optional RGBLED module/ Ultrasonic module is used as the eyes of the robot; and it extends 2 3PGVS standard sensor interface and 1 I2C interface, which has strong scalability.

== Function ==

[[File:Valon_function.png|800px]]

== Parameters ==

* Power supply voltage: 7.4V DC (2 3.7V lithium batteries, note that dry batteries are not supported)
* Anti-reverse connection, anti-overdischarge, one-key activation of lithium battery module
* One-key start switch x1
* Power indicator x1
* Infrared line patrol sensor (digital signal) x3
* Buzzer x1
* LED car lights (digital signal) x2
* Expansion port 3P interface (GVS) x2
* Expansion port I2C interface x1
* N20 metal gear motor x2
* Maximum motor speed: 110 rpm
* Lithium battery usage test: 1 hour tracking operation

== Dimensions and weight ==
Product size: 86mm x 89mm x 52mm (height); weight: 102g (excluding battery and motherboard)

[[File:Valon_Dimensions.png|800px]]

== Import the Makecode Extensions ==

1.Click the link: makecode.microbit.org, enter the makecode graphical online programming platform. (Note: Loading will be slow in the first time, please wait patiently)

2.Import the library: Copy the Valon-I library's address: https://github.com/YFROBOT-TM/pxt-yfrobot-valon

3.Import the library by following the steps.

[[File:import_the_makecode_graphical_library.png|800px]]

== Makecode Programming Example ==

=== LED Light Flash ===

Learning Target: Learn the using way of LED light and buzzer.

Effect: The left and right LED lights flash alternately, and the buzzer emits two different tone frequencies at intervals of 0.5 second.

Makecode Program Link: https://makecode.microbit.org/_dsDPsaPaWJK6

[[File:Valon_01_LED_buzzer.png|500px]]

=== Motor Control ===

Learning Target: Mastering the basic method of motor control.

Effect: The valon forward 1 second; back 1 second; rotate right 1 second; rotate left turn 1 second.

Makecode Program Link: https://makecode.microbit.org/_C3LXJKhFhECJ

[[File:Valon_03_motor_control.png|500px]]

=== RGB LED Control ===

Learning Target: Learn the basic way of using RGB LED.

Fittings:  RGB LED module x 1

Installation:

[[File:Valon_rgb_ultrasonic_install.png|500px]]

Effect: The RGB LED light shows a variety of colors and presents a gradient effect.

Makecode Program Link: https://makecode.microbit.org/_Vi30gsUAiCwt

[[File:Valon_RGBLED.png|500px]]

=== Read Infrared Key ===

Learning Target: Learn to read the key value of infrared, so that later can be flexible use of these data.

Fittings: Infrared receiver module x 1

Installation:

[[File:Valon_infrared_receiver_install.png|500px]]

Effect: Put the the IR receiver toward the IR remote control, when you press any key on the IR remote control. The key assignments that corresponds to the pressed key will displayed on the dot matrix, in decimal notation the high two digits of the key assignments are displayed.

Makecode Program Link: https://makecode.microbit.org/_gXyA5uDYb9c3

[[File:Valon_read_ir.png|500px]]

=== IR Remote Control ===

Learning Target: Learn to use the IR remote control to command the car.

Fittings: Infrared receiver module x 1

Installation: ditto.

Effect: Control car forward, left, right, back with 4 keys of IR remote control "+", "<<", ">>", "-".

Makecode Program Link: https://makecode.microbit.org/_aehKEE0fmFve

[[File:Valon_ir_control.png|500px]]

=== Line tracking ===

Learning Target: Learn to use the line sensors on the back of the car.

Effect: The car is running along the black line.

Makecode Program Link: https://makecode.microbit.org/_itACW0ieLTMp

[[File:Valon_line_tracking.png|500px]]

=== Read Ultrasonic Distance ===

Learning Target: Learn to read the distance of ultrasound, so that later can be flexible use of these data.

Fittings: Ultrasonic Module x 1

Installation:

[[File:Valon_rgb_ultrasonic_install.png|500px]]

Effect: The ultrasonic detects the obstruction in front and the distance will be displayed on the dot-matrix screen in centimeters.

Makecode Program Link: https://makecode.microbit.org/_W31gu5YmTVfU

[[File:Valon_02_ultrasonic.png|500px]]

=== Ultrasonic Obstacle-avoiding ===

Effect: Ultrasonic detects the distance between the car and the obstacle in front of it. If the distance is less than 35cm, the car will randomly choose to turn left or right to avoid obstacles.

Fittings: Ultrasonic Module x 1 

Installation:ditto.

Effect: The ultrasonic detects the obstruction in front and the distance will be displayed on the dot-matrix screen in centimeters.

Makecode Program Link: https://makecode.microbit.org/_JfU3HaR8LCwa

[[File:Valon_ultrasonic_obstacle_avoiding.png|500px]]


For any questions: yfrobot@qq.com






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