display matrix as ()

Description

The block is used to create custom patterns on the RGB LED display of Quarky.

The pattern can be customized with the Quarky Display Painter window.

Example

Beating Heart Quarky – Upload Mode – Block Coding

The project shows how to create custom patterns on Quarky RGB LED in Upload Mode.

Script

Python Code Generated

# This python code is generated by PictoBlox

from quarky import *
# This python code is generated by PictoBlox

# imported modules
import time



while True:
	quarky.drawpattern("jjbjbjjjbbbbbjjbbbbbjjjbbbjjjjjbjjj")
	time.sleep(1)
	quarky.drawpattern("jjjjjjjjjbjbjjjjbbbjjjjjbjjjjjjjjjj")
	time.sleep(1)

Beating Heart Quarky – Stage Mode – Block Coding

The project shows how to create custom patterns on Quarky RGB LED in Upload Mode.

Script

Traffic Light on Quarky

The example displays how we can display a custom pattern on the matrix by making a script to display a Traffic Light.

Script

Output

Touch Piano

The example demonstrates using the Quarky touch display to make touch piano.

Script

Output

Touch-Numbers

Different Motions (Square and Axe)

Learn to move your Quarky Mecanum Wheel Robot in a square and make an axe figure with PictoBlox. Use the arrow keys to activate the custom movements and watch your robot move in the desired direction!

In this activity, we will create a custom activity where you will be able to move the Mecanum robot in a square effortlessly along with making an Axe type figure.

The Quarky Mecanum Wheel Robot is a type of robot that uses a special type of wheel to move. The wheel is made of four rollers mounted at 45- degree angles to the wheel’s hub. Each roller has its own motor and can spin in either direction. This allows the wheel to move in any direction, making it an ideal choice for navigating around obstacles.

Coding Steps

Follow the steps:

Open a new project in PictoBlox and select Block Coding Environment.
Connect Quarky to PictoBlox.
Click on the Add Extension button and add the Quarky Mecanum extension.
Now we will first initialize the Mecanum robots and the servos before starting the main code.
Here there are two parts specifically : To make a Square and To make an Axe

To make a Square (Logic):

The main steps would include to display the lights in arrow forms before implementing the specific move. The moves would be implemented in the following order:

Forward -> Lateral Right -> Backward -> Lateral Left.

We will display the arrows with the help of Quarky LED’s and implement the code.

Example of arrow:

Code for Square Motion:

To make an Axe (Logic):

The main steps would include to display the lights in arrow forms before implementing the specific move. The moves would be implemented in the following order:

Forward ( 2 steps ) -> Lateral Left ( 1 step ) -> Backward Right ( 1 step ) -> Backward ( 1 step )

We will display the arrows with the help of Quarky LED’s and implement the code.

Code for Axe Motion

Main Code

Now we will keep a specific condition on when to activate the Square Motion and when to activate the Axe Motion.

We will use the if-else conditions where on pressing the “up” arrow key, we will initiate the Square Motion and on pressing the “down” arrow key, we will initiate the Axe Motion with the help of Mecanum Robot.

Final Output

Square Motion:

Axe Motion:

Face Tracking Controlled Quadruped

Learn about face-tracking, and how to code a face-tracking Quadruped robot using sensors and computer vision techniques.

Introduction

A face-tracking robot is a type of robot that uses sensors and algorithms to detect and track human faces in real-time. The robot’s sensors, such as cameras or infrared sensors, capture images or videos of the surrounding environment and use computer vision techniques to analyze the data and identify human faces.
Face-tracking robots have many potential applications, including in security systems, entertainment, and personal robotics. For example, a face-tracking robot could be used in a museum or amusement park to interact with visitors, or in a home as a companion robot that can recognize and follow the faces of family members.

One of the most fascinating activities is face tracking, in which the Quadruped can detect a face and move its head in the same direction as yours. How intriguing it sounds, so let’s get started with the coding for a face-tracking Quadruped robot.

Logic

If the face is tracked at the center of the stage, the Quadruped should be straight.
As the face moves to the left side, the Quadruped will also move to the left side.
As the face moves to the right side, the Quadruped will also move to the right side.

Code Explain

Drag and drop the when green flag clicked block from the Events palette.
Then, add a turn () video on stage with () % transparency block from the Face Detection extension and select one from the drop-down. This will turn on the camera.
Add the set pins FR Hip () FL Hip () FR Leg () FL Leg() BR Hip () BL Hip () BR Leg () BL Leg () block from the Humanoid extension.
Click on the green flag and your camera should start. Make sure this part is working before moving further.
Add the forever block below turn () video on stage with () % transparency from the Control palette.
Inside the forever block, add an analyzed image from the () block. This block will analyze the face the camera detects. Select the camera from the dropdown.
Create a variable called Angle that will track the angle of the face. Based on the angle, the robot will move to adjust its position.
Here comes the logical part as in this, the position of the face on the stage matters a lot. Keeping that in mind, we will add the division () / () block from the Operator palette into the scripting area.
Place get () of the face () at the first place of addition () + (), and 3 at the second place. From the dropdown select X position.
If the angle value is greater than 90, the Humanoid will move left at a specific speed. If the angle is less than 90, the Humanoid will move right at a specific speed. If the angle is exactly 90, the Humanoid will return to its home position.

Block Explained

Create a variable called Angle and assign it the value of the face’s position.
At the center of the stage, we will get the X position value which is zero.
As we move to the left side the X position value will give you the negative value and as we move to the right side the X position value will give you the positive value.
The x position value is divided by 3 which gives precise positioning.
To set the angle at 90 when the face is at the center of the stage we have added 90 to the X position value.
As we move to the left side the angle value will get decreased as the X position value is going in negative.
As we move to the right side the angle value will get increased as the X position value is going in positive.

Code

Output

Our next step is to check whether it is working right or not. Whenever your face will come in front of the camera, it should detect it and as you move to the right or left, the head of your Quadruped robot should also move accordingly.

Gesture Controlled Quadruped

Explore the power of machine learning in recognizing hand gestures and controlling the movements of a Quadruped robot.

Introduction

This project demonstrates how to use Machine Learning Environment to make a machine–learning model that identifies the hand gestures and makes the Quadruped move accordingly. learning model that identifies the hand gestures and makes the qudruped move accordingly.

We are going to use the Hand Classifier of the Machine Learning Environment. The model works by analyzing your hand position with the help of 21 data points.

Hand Gesture Classifier Workflow

Follow the steps below:

Open PictoBlox and create a new file.
You can click on “Machine Learning Environment” to open it.
Click on “Create New Project“.
A window will open. Type in a project name of your choice and select the “Hand Gesture Classifier” extension. Click the “Create Project” button to open the Hand Pose Classifier window.
You shall see the Classifier workflow with two classes already made for you. Your environment is all set. Now it’s time to upload the data.

Class in Hand Gesture Classifier

There are 2 things that you have to provide in a class:

Class Name: It’s the name to which the class will be referred as.
Hand Pose Data: This data can either be taken from the webcam or by uploading from local storage.

Note: You can add more classes to the projects using the Add Class button.

Adding Data to Class

You can perform the following operations to manipulate the data into a class.

Naming the Class: You can rename the class by clicking on the edit button.
Adding Data to the Class: You can add the data using the Webcam or by Uploading the files from the local folder.
1. Webcam:

Note: You must add at least 20 samples to each of your classes for your model to train. More samples will lead to better results.

We are going to use the Hand Classifier of the Machine Learning Environment.

Training the Model

After data is added, it’s fit to be used in model training. In order to do this, we have to train the model. By training the model, we extract meaningful information from the hand pose, and that in turn updates the weights. Once these weights are saved, we can use our model to make predictions on data previously unseen.

The accuracy of the model should increase over time. The x-axis of the graph shows the epochs, and the y-axis represents the accuracy at the corresponding epoch. Remember, the higher the reading in the accuracy graph, the better the model. The range of the accuracy is 0 to 1.

Testing the Model

Hand Pose Classifier

The model will return the probability of the input belonging to the classes.You will have the following output coming from the model.

Logic

The Quadruped will move according to the following logic:

When the forward gesture is detected – Quadruped will move forward.
When the backward gesture is detected – Quadruped will move backward.
When the left gesture is detected – Quadruped will turn left.
When the right gesture is detected – Quadruped will turn right.

Code

Output

Sign Detection with Quadruped

Learn how to set the bounding box threshold, and detect signals such as 'Go', 'TurnRight', 'TurnLeft', and 'Stop' to control quadruped movements.

Introduction

A sign detector Quadruped robot is a robot that can recognize and interpret certain signs or signals, such as hand gestures or verbal commands, given by a human. The robot uses sensors, cameras, and machine learning algorithms to detect and understand the sign, and then performs a corresponding action based on the signal detected.

These robots are often used in manufacturing, healthcare, and customer service industries to assist with tasks that require human-like interaction and decision-making.

Code

Logic

Then, it sets up the quadruped robot’s camera to look for hand signs and tells it how to recognize different signs.
Next, the code starts a loop where the robot looks for hand signs. If it sees a sign, it says the name of the sign out loud.
Finally, if the robot sees certain signs (like ‘Go’, ‘Turn Left’, ‘Turn Right’, or ‘U Turn’), it moves in a certain direction (forward, backward, left, or backward) based on the sign it sees.
So, this code helps a robot understand hand signs and move in response to them!

Output

Sign Detection With Humanoid

Learn how to code logic for video input detection .set the bounding box threshold, and detect signals to control Humanoid movements.

Introduction

A sign detector Humanoid robot is a robot that can recognize and interpret certain signs or signals, such as hand gestures or verbal commands, given by a human. The robot uses sensors, cameras, and machine learning algorithms to detect and understand the sign, and then performs a corresponding action based on the signal detected.

These robots are often used in manufacturing, healthcare, and customer service industries to assist with tasks that require human-like interaction and decision-making.

Code

Logic

Initialise the video on stage and set the transparency as 0%
Show the bounding box and set its threshold to 0.8.
Get the input from the camera forever.
If the signal is detected as ‘Go’ then it displays an ‘up arrow’, sounds go straight and the Humanoid will move 2 steps forward at high speed using do () motion () times at () speed block.
If the signal is detected as ‘TurnRight’ then it displays a ‘right arrow’, sounds Turn right and Humanoid will take a right turn at high speed using do () motion () times at () speed block.
If the signal is detected as ‘TurnLeft’ then it displays a ‘Left arrow’, sounds Turn Left and Humanoid will take a left turn at high speed using do () motion () times at () speed block.
If it detects as stop the display will be cleared in the quirky and the humanoid will be at a home() posture.

Output

Sound Based Quadruped with Machine Learning

Learn how to create custom sounds to control Quadruped with the Audio Classifier of the Machine Learning Environment in PictoBlox.

Introduction

A Sound-Based Quadruped with Machine Learning refers to a Quadruped robot that can perceive and interact with its environment through sound-based sensing and uses machine-learning techniques to process and analyze the auditory data it receives.
Quadruped robots with machine learning have the potential to greatly enhance the way we interact with machines and each other, making communication more natural and intuitive while also enabling new applications in fields such as healthcare, education, and entertainment.
In this activity, we will use the Machine Learning Environment of the Pictoblox Software. We will use the Audio Classifier of the Machine Learning Environment and create our custom sounds to control the Quadruped.

Audio Classifier Workflow

Follow the steps below to create your own Audio Classifier Model:

Open PictoBlox and create a new file.
Select the Block coding environment as the appropriate Coding Environment.
Select the “Open ML Environment” option under the “Files” tab to access the ML Environment.
A new window will open. Type in an appropriate project name of your choice and select the “Audio Classifier” extension. Click the “Create Project” button to open the Audio Classifier Window.
You shall see the Classifier workflow with two classes already made for you. Your environment is all set. Now it’s time to upload the data.
As you can observe in the above image, we will add two classes for audio. We will be able to add audio samples with the help of the microphone. Rename class 1 as “Clap” and class 2 as “Snap”.

Note: You can add more classes to the projects using the Add Class button.

Adding Data to Class

You can perform the following operations to manipulate the data into a class.

Naming the Class: You can rename the class by clicking on the edit button.
Adding Data to the Class: You can add the data using the Microphone.
You will be able to add the audio sample in each class and make sure you add at least 20 samples for the model to run with good accuracy.
Add the first class as “clap” and record the audio for clap noises through the microphone.
Add the second class as “snap” and record the audio for snap noises through the microphone.

Note: You will only be able to change the class name in the starting before adding any audio samples. You will not be able to change the class name after adding the audio samples in the respective class.

Training the Model

After data is added, it’s fit to be used in model training. To do this, we have to train the model. By training the model, we extract meaningful information from the hand pose, and that in turn updates the weights. Once these weights are saved, we can use our model to make predictions on data previously unseen.

Testing the Model

To test the model simply, use the microphone directly and check the classes as shown in the below image:

You will be able to test the difference in audio samples recorded from the microphone as shown below:

Export in Block Coding

Click on the “Export Model” button on the top right of the Testing box, and PictoBlox will load your model into the Block Coding Environment if you have opened the ML Environment in the Block Coding.

The Quadruped will move according to the following logic:

When the audio is identified as “clap” sound– Quadruped will move forward.
When the “snap” sound is detected –Quadruped will move backward.

Note: You can add even more classes with different types of differentiating sounds to customize your control. This is just a small example from which you can build your own Sound Based Controlled Quadruped in a very easy stepwise procedure.

Code

Logic

First, initialize the Quadruped extension.
Then, initialize a forever loop to continuously loop and analyze the camera from the stage.
If the program detects a clap sound, the Quadruped will move forward at a specific speed.
Similarly, if it identifies a snap sound, the Quadruped will move backward at a specific speed.
Otherwise, the Quadruped will remain in its initial position (home position).

Output

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PictoBlox Extensions

display matrix as ()

Description

Example

Script

Python Code Generated

Script

Script

Output

Script

Output

Coding Steps

To make a Square (Logic):

Code for Square Motion:

To make an Axe (Logic):

Code for Axe Motion

Main Code

Final Output

Introduction

Logic

Code Explain

Block Explained

Code

Output

Introduction

Hand Gesture Classifier Workflow

Class in Hand Gesture Classifier

Adding Data to Class

Training the Model

Testing the Model

Hand Pose Classifier

Logic

Code

Output

Introduction

Code

Logic

Output

Introduction

Code

Logic

Output

Introduction

Audio Classifier Workflow

Adding Data to Class

Training the Model

Testing the Model

Export in Block Coding

Code

Logic

Output

Company

Community

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