Welcome to the world of Magicbit

Magicbit is a feature-rich, easy-to-use, and cost-effective platform made for everyone. The inbuilt functionalities of Magicbit provide a unique advantage for users to learn and practice a wide range of application areas such as robotics, programming, Internet of Things(IoT) and electronics.

Magicbit is an innovation ecosystem with hardware, software, mobile app, content, community and partners. Integrated solutions can be developed more easily while exploring cross-platform options such as programming with any other software or connecting to any cloud IoT platform.

A frequently asked question about Magicbit is “How many innovations can I develop with Magicbit?” The answer to that would be “It has no limits”. Your creativity and innovative mindset have to decide the number of innovations you can do. After all, the world needs more solutions with technology to resolve some of the burning problems faced by mankind. Making technology accessible and available to everyone is the passion Magicbit team would like to share with everyone.

So, Welcome to the world of Magicbit !!! Let’s start your journey of innovation.

Magicbit

Magicbit board itself has many in built features to support learning and innovation

  • High Performance -240 MHz Speed, 4 MB Flash, 520 KB RAM
  • On Boards Sensors -Push Button, LDR, Potentiometer
  • On Board Actuators- OLED Display, Buzzer, Motor Driver
  • Multiple Connectivity Options -USB, Bluetooth, Wifi
  • Pluggable Modules- Plug and play design
  • Other Features- Li-ion battery charger

Magicbit Layout

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Magicbit pinout

What you need

  • Magicbit core
  • Computer or Laptop
  • Wifi connection with internet
  • USB cable

Setting up device

Plug your magicbit into Computer through the USB cable. it will automatically load the Magic os .

If you bought the magicbit recently, magicbitOS is installed on your magicbit from the factory. if not Install Magic OS manually click here

What is Magic OS

MagicbitOS is an all-in-one operating system that runs on magicbit.magicbitOS is an all-in-one operating system that runs on magicbit. You can switch between magicblocks , magiccode & test modes without a need for a computer to reprogram the board.

Learn more

Selecting Modes on Magicbit OS

you have 3 options to choose from Magicbit ee

When you power up magicbit, you get 10 seconds to select mode. Else magicbit will boot up to the mode you previously selected. Inside the boot menu you have 3 options to choose from. You can change the selection from the left push button and load the mode from the right push button.

magicblocks IoT enables you to build IoT applications with magicblocks.io platform. Find more information from www.magicblocks.io.

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magicode is the scratch based no-code programming platform from us.magiccode You can learn underlying theories of programming in a graphical manner using this. By enabling this mode, you enable magiccode WiFi version. You can connect the magicbit to the computer and program using magiccode, more info from here .

Magicbit demo >> Sensor test

magicbit demo includes a sensor test program as well as a program to test out the magicbot robot platform without the need of reprogramming or a computer.                                                                                                                                                 .

Sensor test >>

Sensor test mode could test all the sensors comes with magicbit platform easily.                                                                                                                                                                                                                                                                                                                                                                                                                                               .                                                                                                 .

Magicbit Demo >> Magicbot demo

If you have a magicbot robot kit, you can test run it easily. Line follower program and obstacle avoidance program can be selected from the menu                                                                                                                                                                                                                                                                                      .

Program your Magicbit

Magicbit is a tiny computer. Any computer needs a set of instructions to work or perform a task. This is why we need to program computers or any hardware device to develop applications. The normal computers we use have operating systems which are large computer programs to help us to use the device more easily.

magicbit core

Since Magicbit is a tiny computer with limited capacity it can run only a small set of instructions compared to a normal computer. Programming the Magicbit  will provide the instruction set to perform a specific task as defined by the Magicit user.

what is programing

Programming is the way of providing instructions for computers to work. We can input instructions to computers using programs. Programming languages are used  to create these instructions  and we can write the programs to perform the tasks we need from a computer. There are many popular programming languages are C, C++. C#, Python, Java Script & etc.

There are tools such as programming IDEs ( integrated development environment) which provides comprehensive facilities to develop computer programs. Normally programming languages have text-based interfaces. In order support beginners, there are visual code builders with block based programming. In these programming languages or IDEs, users can simply drag and drop different blocks to create a program. Scratch is popular visual code builder used by millions of users around the world.

Programming Options

Magicbit can be programmed with many text based and block based programming options. MagicCode is the Scratch version developed to support Magicbit environment. Mahgicblocks.io is another block based cloud platform developed to create IoT applications. This platform can be custom programmed using Java Script. Some of the other options available are micropython  and Arduino IDE.

Although Magicbit can be programmed with multiple programming languages, it can be programmed with only one programming option at a given time.

Magicblocks
Magicblocks

It is an IoT(Internet of Things) platform to create IoT projects in minutes for both beginners and experts

MagicCode
MagicCode

Specially designed for kids to start learning programming with visual blocks based on Scratch3

Arduino
Arduino

C/C++ based language with a large community all around the world with lot of free resources

MicroPython
MicroPython

Program microcontrollers and robots easily with world famous python programming language.

Setup your programing environment

What is Arduino?

The Arduino Integrated Development Environment is a cross-platform application that is written in functions of C and C++.

It is used to write and upload programs to Arduino compatible boards. But also, with the help of third-party cores, other vendor development boards.

Download

Add magicbit to Arduino IDE

Magicbit is based on ESP32 and Arduino core because Magicbit is forked from the espressif/arduino-esp32. Therefore, to program a Magicbit with the Arduino IDE, you will have to go through the following steps.

  • Release Link –https://github.com/magicbitlk/arduino-esp32/releases/download/Magicbit/package_magicbit_index.json

  • Install the current Arduino IDE at the 1.8 level or later.
  • Start Arduino and open the Preferences window.
  • Enter the release link above into the Additional Board Manager URLs field. You can add multiple URLs, separating them with commas.
  • Open Boards Manager from Tools > Board menu
  • search “magicbit” and install Magicbit platform.
  • (and don’t forget to – – select Magicbit from Tools > Board menu after installation).

Install Drivers

Magicbit has a CH340 chip as a USB-Serial converter which the driver is already packaged with Arduino IDE. if you have  already  installed the magic OS, drivers will automatically install on your computer. otherwise you can Download and install (Ch-340 )drivers manually.

Download

Connect to computer

Magicbit setup 1Connect Magicbit to the computer using provided USB cable.

open the Arduino IDE and go to the Tools menu. and select the port you connected and select Board as magicbit.

Hello Magicbit

  • Open Arduino IDE if not opened already
  • Select Magicbit from Tools ⇒ Boards
  • Select port Tools ⇒ Ports
  • Open Blink Example File ⇒ Examples ⇒ Basic ⇒ Blink
  • Upload the code to the Magicbit using the upload button on Arduino IDE
  • If the Green LED on the backside of the Magicbit is blinking, you have just begun the magic with Magicbit

Create Magicblocks.io Account

  • Click on the Signup button after inserted your details
Signup menu
  • Go to the email account you provided and activate your Magicblocks account with the Activation Link
  • Follow the Activation Link which we have sent you in an email
    Gmail verification email

Login to Your Magicblocks.io Account

  • Go to Magicblocks.io official website – magicblocks.io
  • Select LOGIN
  • Provide your login details
  • Enter your email address and the Magicblocks Password and sign in to Magicblocks

 

User Login screen

Start the Playground

Magicblocks.io playground

The playground is the visual programming environment based on Node-Red that has been customized for seamless integration with hardware devices to enable IoT. When you log in for the first time, your playground will not be running.  If you do not have a valid subscription, you will be allowed to run the playground only for 1 hour continuously before it is automatically stopped. You will need to restart the playground manually after this 1-hour period. You can subscribe to the Standard Subscription  by entering the coupon code in the Subscription tab provided with your Magicbit device. If you have any issue please write to [email protected]

Magicblocks demo mode

Create a new device

Go to Device Manager and add a new device. Set device type as Magicbit & set the status to Active. You can use any name and description.

Add New Device menu

Keep this browser tab open, since you will need to copy the device ID and the key to set up the device.

Setting up a device

  • Connect Magicbit to the computer using provided USB cable.
Magicbit setup 1
Connect Magicbit to a computer
  • Connect the Magicbit to the computer. After, click the  
Device Configuration
  • Download the Magicbit Uploader and install on your computer. After, open the Magicbit Uploader software and install the drivers, then select your device COM port.
  • Finally, install the Magicblocks firmware.
  • Wait for the installation to finish. Afterward, connect your computer to the Magicbit WiFi network.
  • Then, click next button and you will be directed the webpage below and close the page.

  • Login to Magicblocks, navigate to Device Manager, and check if the Connection column comes up as a green indicator. If yes, you can proceed to the next step. Finally, disconnect from Magicbit WiFi and reconnect to your default WiFi.

Go to the playground!

  • Login to Magicblocks and click on Playground Button to open the playground.
  • The playground is a hosted instance of a customized version of the open-source Node-Red application. On the left, you will find the palette where all the blocks will reside. You can drag and drop the blocks from the palette to the canvas and start rolling very quickly. Once done, click the Deploy button in the top right corner and all your changes will be saved. In the next section, we will go through some examples covering all the relevant blocks.
Magicblocks.io code building interface.

Hello Magicbit

Let’s start magic by displaying text on the Magicbit display.

Open the Device Manager in your Magicblocks account
  • Turn on your Magicbit board that was set up in the previous section and wait for it to connect
  • Open the playground
  • Drag and drop the Display block under the category Magicbit
  • Double-click on the block and select the device ID
  • Drag and drop inject blocks under the input category and connect them to the Display block
  • In one inject node-set payload type as String and type Hello Magicbit in the text box. You can set a topic too.
  • Click deploy
  • Click the button in inject node to see the magic. You can set any text from anywhere in the world!!!

Introduction

MagicCode is a Scratch 3.0 based graphical programming software that makes you learn to code superfast. If you are new to the world of programming, MagicCode is one of the best companions that makes coding fun and easy. The user-friendly interface and drag and drop functionality make coding more interesting because of no need to worry about traditional programming rules. You can create your interactive games, animations, or program robots and projects with MagicCode. You can directly connect your Magicbit, Arduino, or Microbit boards with MagicCode and control generic sensors and actuators, or It also has an upload mode where you can upload your code inside boards.

Getting Started

magiccode interface

MagicCode interface and tools

  • Blocks

block is like a jigsaw puzzle piece that is used to write programs by simply dragging and dropping them below one another in the scripting area. Blocks are often easier to work with than text-based programming, as one has to memorize the commands typed and syntax errors may occur. There are ten categories of blocks: Motion, Looks, Sound, Event, Control, Sensing, Operators, Variables, List, and My Blocks. The list blocks are shown under the Variables Blocks.

  • Block palette

The block palette is under the Code tab. It consists of different palettes such as Motion, Sound, and Control. Each palette has different blocks that perform functions specified by the palette name. There are other varieties of block palettes that can be loaded from the Add Extension button located at the left bottom.

  • Script

script is a program or code in MagicCode which is a collection or stack of blocks that all interlock with one another. The blocks and their order are very important, as they determine how sprites interact with each other and the backdrop. Sometimes, comments are attached to scripts to explain what certain blocks do and what the script’s purpose is. You can write multiple scripts, all of which can then run simultaneously.

  • Connect Devices

Connect Devices is used to connect devices (Magicbit, Arduino, or Microbit) with MagicCode.

  • Add Extensions

Add Extensions are used to add new palettes to the block palette.

  • Sprite

Sprites, either user-created, uploaded, or found in the MagicCode Sprites library, are the objects that perform actions in a project. Most projects have at least one sprite as well because only sprites can move.

magiccode interfaceUsers can give instructions to a sprite (such as telling the sprite to move) by snapping blocks together in the script area. Clicking on the block(s) in the script area will cause the sprite to react based on the function of the block(s) clicked. Clicking on a sprite’s thumbnail in the sprite pane will bring up the script area of that sprite.

The look of a sprite can also be changed by using costumes. The current costume of a sprite can be changed by clicking on the “costumes” tab and clicking on the desired costume of choice, or by using look blocks to select the sprite’s costume. New costumes for the sprite can be imported, created, and edited in the MagicCode Paint Editor.

Some sprites additionally have at least one sound. Unlike costumes, sounds are an optional field, so you can have a sprite with no sounds. The sounds tab allows you to add, delete, and edit sounds. Sounds can be played in the sound editor or with blocks that play a specific sound. Sprites (with all of their scripts, costumes, and sounds) can be exported, and then imported into another project if desired. This is achieved by right-clicking on a sprite’s thumbnail in the sprite pane and then selecting “save to local file” in the pop-up menu. A sprite can also be dragged into the backpack and dragged out into another project for transporting. However, this will not save the sprite to one’s computer.

  • Stage

The stage is the background of the project where your sprites perform their actions, but it can have scripts, backdrops (costumes), and sounds, similar to a sprite, and it has its own scripts and sounds. But the stage has some restrictions on sprite functions, such as motion and size blocks.

The stage is 480 pixels wide and 360 pixels tall. All sprites have a particular position on the stage. However, no sprites can move behind the stage, and it is always at the back layer.


The Device tab is the place where you can connect your boards with MagicCode. MagicCode provides facilities to connect five boards. You can connect your Magicbit, Arduino UNO, Arduino Mega, Arduino Nano, or Microbit Boards with MagicCode. You can program your board either in live mode or Upload mode.

Live mode

In the Live mode, you can view the program execution effect in real-time, which facilitates the commissioning of the program.

Note

In this mode, you must keep the board connected to MagicCode. If it is disconnected, then the program cannot be executed.

Upload mode

In the Upload mode, you need to upload the compiled program to the device. After being successfully uploaded, the program can still run properly on the device when the device is disconnected from MagicCode.

Connecting Magicbit with Computer

There are two ways to connect a MagicBit to the computer.

  • Wirelessly through WiFi (Useful when using magiccode for robotics and sensing applications).
  • Through a USB cable from a serial connection.

 

WiFi Mode

If you have MagicbitOS installed in your magicbit, you can select magiccode-WiFi option to program magicbit board with magiccode. Continue from step 3 if you have magicbitOS.

1. Connect your device to the pc with a USB Connector. Alternatively, you could connect your magicbit to a 5V phone charger or a 3.7V battery too.

Magicbit setup 1

2. Upload magicbitOS firmware using magicbit uploader.

Select the correct serial port and click on magicbitOS button.

Now you can connect the board to a battery, a powerbank, or a phone charger brick. and wirelessly program the magicbit.

3. Boot from magiccode.

On the boot menu, using left key, select magiccode and press left key to load it.

4. Connect to magiccode

Then a SSID and a password will appear on the screen.

Go to wifi settings in the computer and select the wifi SSID name displayed on the Magicbit screen with the password. This will connect the board with the computer via wifi to communicate wirelessly.

5. Start building with magiccode

Open MagicCode software and select the devices tab.

Choose the Wi-Fi option and click on connect. This will connect the software to the board.

If everything works properly disconnect button will appear.

Now you can execute magiccode comands as usual.

Using USB mode.

1. Connect your device to the pc with a USB Connector.

Magicbit setup 1

2. Upload magicCode firmware using Magicbit Uploader

 

Select the correct serial port and click on magiccode icon.

Select USB option. Then magiccode firmware will be loaded on to the magicbit.

3. Go to the Device tab at the down right corner of the MagicCode interface.

Device menu

3. Select Live Mode. 

4. Select your Device by clicking the Select button.

 

magic Code device menu

The above Devices’ library is displayed after clicking the select button and select your devices from the library.

5. Select the Serial port where the device is connected.

Click on the USB mode button. Then serial port selection menu will appear.

If you don’t see any port in the select port menu, then click the refresh button. The following figure, displays the select port menu.

 

Port selection menu

6. Click the connect button and connect your device to MagicCode.

After the device has connected, the “Connect” button changes to the “Disconnect” button and the icon changes.

Device menu in not connected modeDevice menu in connected mode

Now you can create and execute your program with your board.

What is Micropython?

MicroPython is a lean and efficient implementation of the Python 3 programming language that includes a small subset of the Python standard library and is optimized to run on microcontrollers and in constrained environments. Learn more about MicroPython

It is very useful to use an IDE to program your Magicbit with MicroPython firmware. Thonny IDE will be introduced to you in this session. Using MicroPython and the Thonny IDE, you’ll have your first LED blinking using Micropython and thonny IDE.

Upload Micropython firmware using Magicbit Uploader

If you are starting the programing, you should have uploaded the micropython firmware to the magicbit.

  1. Use the magicbit web uploader or download and install Magicbit uploader offline
  2. Connect Magicbit to the computer
  3. In the web uploader, press connect button and select the correct COM port. If you are using magicbit uploader offline, open Magicbit Uploader and select your device COM Port & press connect.

 

4. Install Micropython firmware

 

Installing Thonny IDE

  1. Go to https://thonny.org
  2. Download the version for Windows and wait a few seconds while it downloads.Download Thonny IDE
  3. Run the .exe file.Install Thonny
  4. Follow the installation wizard to complete the installation process. You just need to click “Next”.
  5. After completing the installation, open Thonny IDE. A window as shown in the following figure should open.

Create First Project (LED Blink)

  • Open Thonny IDE
  • Copy – Paste following code on the editor
from machine import Pin
import time
led = Pin(16, Pin.OUT)
for i in range(10):
     led.on()
     time.sleep_ms(500)
     led.off()
     time.sleep_ms(500)



  • click save as and select ‘Micropython Device’ and choose file name as ‘boot.py’

 

  • Click Run (Green Arrow) on the IDE — If the Green LED on the backside of the Magicbit is blinking, you have just begun the magic with Magicbit

What is a LED

A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it.

In short, LEDs are like tiny lightbulbs. However, LEDs require a lot less power to light up by comparison. They’re also more energy efficient, so they don’t tend to get hot as conventional lightbulbs do.

Here is the circuit symbol.

LEDs on magicbit

magicbit dev Board has 4 LEDs connected to the pin numbers 16.17 and 18,27 . By setting the output state to a high of the LED pin will turn on the LED and by setting the output state to LOW will turn off the LED.

LED 1 =  Green  -pin 16

LED 2 = Yellow -pin 18

LED 3 = Red  -pin 27

LED 4 =  Blue – pin  17

Activities

What is LDR

Light-dependent resistors, LDR is an electronic component that is often used in electronic circuit designs where it is necessary to detect the presence or the level of light.

LDR ( 20mm ) – Free Electronics

Here is the circuit symbol.

Light Dependent Resistor : Circuit Diagram, Types, Working & Applications

LDR on magicbit board

Magicbit has an inbuild  LDR connected to pin 36 . it gives an analog voltage input from 0 to 3.3V and it converts to a digital value of 0 to 4095.

Activities

what is Push button

A push button switch is a mechanical device used to control an electrical circuit in which the operator manually presses a button to actuate an internal switching mechanism. They come in a variety of shapes, sizes, and configurations, depending on the design requirements.

 

When the pushbutton is open (unpressed) there is no connection between the two legs of the pushbutton, When the button is closed (pressed), it makes a connection between its two legs.

Here is the circuit symbol.

Pushbutton on magicbit

There are 2 Pushbutton on the magicbit dev board. it’s connected to the  pin numbers 34 and 35.

Activites

what is Buzzer

The buzzer is also called a piezo buzzer. It is basically a tiny speaker.

You can make it sound like a tone at a frequency you set. The buzzer produces sound based on the reverse of the piezoelectric effect.

Here is the circuit symbol

Buzzer on magicbit

Magicbit dev board has inbuild Buzzer. it’s connected to the pin number 25.

Activites

what is Potentiometer

potentiometer (also known as a pot ) is defined as a 3 terminal device.  basically, the potentiometer will act as a variable resistor. When you turn the knob, the resistor will increase or decrease,

Potentiometers have a range of resistance. They can be attuned from 0 ohms to whatever maximum resistance. For example, a potentiometer of 100 kΩ can be adjusted from 0 Ω to its maximum of 100 kΩ.

Here is the circuit symbol.

Potentiometer on magicbit

There is an inbuild potentiometer on the magicbit. which is connected to pin, D39. It generates a voltage between 0 and 3.3V according to the angle of the potentiometer.

Activites

what is motion sensor

motion sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range.  These sensors are commonly found in appliances and gadgets used in homes or offices. They are often referred to as PIR, “Passive Infrared”, “Pyroelectric”, or “IR motion” sensors.

PIRs are basically made of a pyroelectric sensor (which you can see below as the round metal can with a rectangular crystal in the center), which can detect levels of infrared radiation.

Everything emits some low level radiation and the hotter something is emitted more radiation. The sensor is actually split into two halves.  The two halves are wired up so that they cancel each other out. If one half sees more or less IR radiation than the other, the output will swing high or low.

Motion sensor module for magicbit

PIR sensor

Activites

what is proximity sensor

An infrared sensor is similar to the object detection sensor. This sensor includes an IR LED & an IR Photodiode.The emitter is simply an IR LED (Light Emitting Diode) and the detector is simply an IR photodiode that is sensitive to IR light of the same wavelength as that emitted by the IR LED.

When IR light falls on the photodiode, the resistances and the output voltages will change in proportion to the magnitude of the IR light received.

proximity sensor working range is around 2-20 cm distance.

Proximity sensor module for magicbit

you can buy these sensors with magicbit pro. it can connect to magicbt without any wires .proximity sensor can connect pin number 32 and 33 both.TCRT5000 IR sensor

Activites

Smart Water Bottle With Magicbit

most of the time we forget to drink enough water either we are in home, office or on the go. So we made smart water bottle using Magicbit development board.

Smart Water Bottle With Magicbit

what is RGB LED

NeoPixel led is a strip of LEDs with RGB combinations. The LED was made by the Adafruit company to avoid the pins issue and complex circuitry. it can be controlled from a single pin on a microcontroller.

Tweaking4All.com - Arduino - Controlling a WS2812 LED strand with NeoPixel or FastLED

With an RGB LED you can produce almost any color. To produce other colors, you can combine the three colors in different intensities.

color mixing

Here is the circuit symbol.

RGB LED module for magicbit

There is a pluggable RGB LED module for magicbit. you can connect it to pin number x easily.

RGB Module

Activites

what is servo motor

A servo motor is a kind of motor that has extremely precise rotational capabilities. A servo consists of a Motor (DC or AC), a potentiometer, gear assembly, and a controlling circuit.   control circuit  provides feedback on the current position of the motor shaft.

Servo Motor- Definition, working principles

Servo motor is controlled by PWM (Pulse with Modulation) which is provided by the control wires. There is a minimum pulse, a maximum pulse and a repetition rate. Servo motor can turn 90 degree from either direction form its neutral position. The servo motor expects to see a pulse every 20 milliseconds (ms) and the length of the pulse will determine how far the motor turns. For example, a 1.5ms pulse will make the motor turn to the 90° position, such as if pulse is shorter than 1.5ms shaft moves to 0° and if it is longer than 1.5ms than it will turn the servo to 180°.

Sensors | Free Full-Text | Low-Cost Servomotor Driver for PFM Control | HTML

Servo motor works on PWM (Pulse width modulation) principle, means its angle of rotation is controlled by the duration of applied pulse to its Control PIN.

Servo motors are rated in kg/cm (kilogram per centimeter) most hobby servo motors are rated at 3kg/cm or 6kg/cm.

servo motor for magicbit

Activites

what is IR receiver

IR receiver modules are used to receive IR signals. These modules work in 3, 8 KHz frequency. When the sensor is not exposed to any light at its working frequency.

10 Pcs Reception Distance 15M Infrared VS838 IR Receiver Modules Black: Buy Online at Best Prices in SriLanka | Daraz.lk

These modules have 3 pins for Vout, VDD, and Ground so it’s very easy to use them in circuits.

IR receiver module for magicbit

Flame Sensor

Activites

what is IR emitter

An Infrared emitter, or IR emitter, is a source of light energy in the infrared spectrum. This is type of light emitting diode (LED) that is used in order to transmit infrared signals from a remote control and etc..

IR Emitter | Luckylight

IR emitter module for magicbit

Activites

what is temp. & humi. sensor (DHT11)

The DHT sensors are made of two parts, a capacitive humidity sensor and a thermistor.There is also a very basic chip inside that does some analog to digital conversion and spits out a digital signal with the temperature and humidity. The digital signal is fairly easy to read using any microcontroller.

  • Ultra-low cost
  • 3 to 5V power and I/O
  • 2.5mA max current use during conversion (while requesting data)
  • Good for 20-80% humidity readings with 5% accuracy
  • Good for 0-50°C temperature readings ±2°C accuracy
  • No more than 1 Hz sampling rate (once every second)

DHT11 sensor module for magicbit

humidity temperature

Activites

what is Tilt sensor

The tilt sensor is a component that can detect the tilting of an object. They are usually made by a cavity of some cylindrical and conductive free mass inside, such as a blob of mercury or rolling ball. One end of the cavity has two conductive elements. When the sensor is oriented so that that end is downwards, the mass rolls onto the poles and shorts them, acting as a switch throw.

Tilt sensor module for magicbit

tilt sensor

Activites

what is soil moisture sensor

There are different types of soil moisture sensor on the market, but their working principal are all similar. All of these sensors have at least three pins: VCC, GND, and AO. The AO pin voltage changes according to the amount of moisture in the soil .

When there is more water, the soil conducts more electricity, which means that the resistance will be less. So the moisture level will be higher. Dry soil reduces conductivity. So, when there is less water, the soil conducts less electricity, which means it has more resistance. So the moisture level will be lower.

Soil moisture sensor for magicbit

China Soil Moisture Sensor Module - China Soil Moisture Sensor, Capacitive Soil Moisture Sensor Module

Activites

what is Ultrasonic sensor

An ultrasonic sensor is an electronic device that measures the distance of a target object by emitting ultrasonic sound waves, and converts the reflected sound into an electrical signal.  Ultrasonic sensors have two main components: the transmitter (which emits the sound using piezoelectric crystals) and the receiver (which encounters the sound after it has travelled to and from the target).Theoretically, the distance can be calculated using the TRD (time/rate/distance) measurement formula. Since the calculated distance is the distance traveled from the ultrasonic transducer to the object—and back to the transducer—it is a two-way trip. By dividing this distance by 2, you can determine the actual distance from the transducer to the object. Ultrasonic waves travel at the speed of sound (343 m/s at 20°C).

In order to generate the ultrasound we need to set the Trigger Pin on a High State for 10 µs. That will send out an 8 cycle sonic burst which will travel at the speed sound and it will be received in the Echo Pin. The Echo Pin will output the time in microseconds the sound wave traveled.

Ultrasonic HC-SR04 timing diagram

 

Ultrasonic sensor for magicbit

Activites

power up magicbit

there are many ways to power magicbit dev board.  you can use USB, battery, or external power to power up magicbit device. Magicbit is operated with a Voltage of 3.3V and should be handled with care to avoid any damage to user and the device.

NOTE-

  • magicbit operating voltage is 3.3v but you can use a 5v supply through the USB.
  • it has an inbuild battery charger module to charge li-ion 3.7v batteries.
  • do not exceed the power voltage 5V limit.

Power option

The easiest way to power your Magicbit is to use the USB cable. The magicbit includes a micro USB port  which you can both supply power to the board and communication with computer.

Just plug one end of the cable into your computer’s USB port or to a power bank , the other end to the USB port of the Magicbit.

the second option is to power up the magicbit using the battery. The following batteries can be used based on your battery holder selection.

  • 1x 18650 Li-ion battery

The magicbit has an inbuild battery charger. so you can charge the 3.7v li-ion 18650 battery directly from the USB port without any external charger.

  • 3x AA Alkaline Battery
  • Or you can use three 1.5v AA batteries to powerup the magicbit.

The 3rd option is to connect an external 5v power supply to the VBAT pin and GND pins at bottom of the magicbit dev board.

You have to be very careful when you do that. If you power your magicbit this way, you’re bypassing the onboard voltage regulator that is on board the magicbit, and therefore your magicbit has no protection against over-voltage and polarity protection.

NOTE- power supply should be 5v volts.