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Microcontroller Based Water Level Controller cum Motor Protector

by KNS Pvt Ltd
Save Rs. 201.00
Rs. 1,700.00
Rs. 1,499.00

Summary

The Micro-controller based Water Level Indicator cum Motor Protector circuit uses the micro-controller AT89C51 as the main controller. It can be used to switch ON and OFF the motor depending upon the level of the water in the tank. The status is displayed on an LCD module. The circuit also protects the motor from high voltages, fluctuations of mains supply and dry running.

Product Description

The Microcontroller based Water Level Controller cum Motor Protector controls ‘on’ and ‘off’ conditions of the motor depending upon the level of water in the over head tank (OHT), the status of which is displayed on an LCD module. The circuit also protects the motor from high voltages, low voltages, fluctuations of mains power and dry running.


Working

The circuit of the Microcontroller based Water Level Controller cum Motor Protector comprises of the operational amplifier LM324, microcontroller AT89C51, optocoupler PC817, regulator 7805 and an LCD module. Port pins P2.0 through P2.2 of the AT89C51 (IC2) are used to sense the water level, while pins P2.3 and P2.4 are used to sense the under-voltage and over-voltage, respectively. Pin P3.4 is used to control relay RL1 with the help of optocoupler IC3 and transistor T5 in the case of under-voltage, over-voltage, and different water-level conditions. The LM324 (IC1) is a quad operational amplifier (op-amp). Two of its op-amps are used as comparators to detect under- and over-voltage. In normal condition, output pin 7 of IC1 is low, making pin P2.3 of IC2 high. When the voltage at pin 6 of N1 goes below the set reference voltage at pin 5 (say, 170 volts), output pin 7 of N1 goes high. This high output makes pin P2.3 of IC2 low, which is sensed by the microcontroller and the LCD module shows ‘low voltage.’

In normal condition, pin 1 of N2 is high. When the voltage at pin 2 of N2 goes above the set voltage at pin 3, output pin 1 of N2 goes low. This low signal is sensed by the microcontroller and the LCD module shows ‘high voltage.’
Presets VR1 and VR2 are used for calibrating the circuit for under- and over-voltage, respectively. When water in the tank rises to come in contact with the sensor, the base of transistor BC548 goes high. This high signal drives transistor BC548 into saturation and its collector goes low. The low signal is sensed by port pins of microcontroller IC2 to detect empty tank, dry sump, and full tank, respectively.

When water in the tank is below sensor A, the motor will switch on to fill water in the tank. The LCD module will show ‘motor on.’ The controller is programmed for a 10-minute time interval to check the dry-run condition of the motor. If water reaches sensor B within 10 minutes, the microcontroller comes out of the dry-run condition and allows the motor to keep pushing water in the tank. The motor will remain ‘on’ until water reaches sensor C. Then it will stop automatically and the microcontroller will go into the standby mode. The LCD module will show ‘tank full’ followed by ‘standby mode’ after a few seconds. The ‘standby mode’ message is displayed until the water in the tank goes below sensor A.

In case water does not reach sensor B within 10 minutes, the microcontroller will go into the dry-running mode and stop the motor for 5 minutes, allowing it to cool down. The LCD module will show ‘dry-sump1.’ After five minutes, the microcontroller will again switch on the motor for 10 minutes and check the status at sensor B. If water is still below sensor B, it will go into the dry-running mode and the LCD module will show ‘dry-sump2.’ The same procedure will repeat, and if the dry-run condition still persists, the display will show ‘dry-sump3’ and the microcontroller will not start the motor automatically. Now you have to check the line for water and manually reset the microcontroller to start operation. In the whole procedure, the microcontroller checks for high and low voltages.

For example, when the voltage is high, it will scan for about two seconds to check whether it is a fluctuation. If the voltage remains high after two seconds, the microcontroller will halt running of the motor. Now it will wait for the voltage to settle down. After the voltage becomes normal, it will still check for 90 seconds whether the voltage is normal or not. After normal condition, it will go in the standby mode and start the aforementioned procedure.
 

Click To View Circuit Diagram

 

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Slabs-32 IoT Development Board Save Rs. 1,300.00
Rs. 4,899.00
Rs. 3,599.00

Slabs-32 IoT Development Board

Slabs-32 IoT Development Board

by Startoon Labs
Save Rs. 1,300.00
Rs. 4,899.00
Rs. 3,599.00
Slabs-32 is a microcontroller based pocket-sized IoT Development board and is 100% Arduino IDE compatible. It is suitable for quick prototyping of various electronic systems in fields of robotics, biomedical PoCs, consumer electronics, hobby projects etc. All the software libraries required for using this board are available for free at the website. Almost all available sensors (gas, temperature, light, IR, ultrasonic to name a few) and motor drivers to drive DC motors, Stepper and servo motors, Solenoids, LEDs, Buzzers etc can be interfaced to the ports available on Slabs-32 IoT board. The user should take care of voltage level ratings before interfacing devices to Slabs-32 board.

This board is completely suitable for all IoT based projects/embedded systems design as it has a WiFi module, screen, and SD card slot already available on the PCB. The software is developed using Arduino IDE and example programs are available for free for quick development of projects.

Learning

The following learning is possible with this board:

  • Basics of programming and logic design using Arduino IDE

  • Interfacing sensors and actuators

  • Learn to send data to the server using WiFi protocol

  • Learn to display graphs

  • Learn to design visual games using onboard screen

  • Learn to build electronics systems quickly with already available software modules for all the peripherals

    And many more...

Product Description

Slabs-32 board uses a powerful combination of an 8-bit microcontroller- Atmega328P and Tensilica's 32-bit L106 diamond series microcontroller. This board combines the high processing capabilities of 32-bit microcontroller L106 and numerous GPIOs available for human-machine interface (HMI) on the Atmega328P.

    The Slabs-32 distinguishes itself from other currently available IoT development boards by having a high-resolution TFT to display the acquired data in real time. The acquired data can also be stored in the SD card (not included in the Kit) and simultaneously be pushed to the web server for further analysis and display at a remote location. Slabs-32 board is programmable using the famous Arduino IDE.

    With I2C as interprocessor communication libraries already available free for usage from Startoon Labs, Slabs-32 board facilitates a combination of processing power and sufficient GPIOs for all your complex prototyping needs. The board has built-in Wi-Fi support, a USB port for programming and debugging, an SD card slot, 5 analog inputs, 12 GPIOs (few having PWM capability) and an 8 MHz crystal. It has onboard LEDs for indication of power and bi-directional serial data transfer. There are independent reset switch and one user programmable interrupt button each for both the microcontrollers onboard.

    Package includes

    The product is shipped in a plastic box which includes the following items:

    • One Slabs-32 IoT development board in an ESD safe cover

    • One USB Mini B cable for programming

    • One mini quick start user guide

    • One Pin-map card for quick reference of interface pins on the Slabs-32 board.

    DTMF Based Home Security System Save Rs. 500.00
    Rs. 4,000.00
    Rs. 3,500.00

    DTMF Based Home Security System

    DTMF Based Home Security System

    by KNS Pvt Ltd
    Save Rs. 500.00
    Rs. 4,000.00
    Rs. 3,500.00

    This DTMF based home security system keeps your home secured against any unauthorised intrusion.

    Learning from this project

    Embedded systems

    Product Description

    Security is a prime concern in our day to day life. The DTMF based security system presented here is an access control that allows, only an authorized person to access a restricted area. This system is suitable for corporate offices, ATMs and home security among other applications.

    The system comprises a small electronic unit with a mobile keypad which is outside the entry door to control a solenoid-operated lock with help of a D.C. motor. When an authorized person enters the predetermined password via the hand held mobile keypad from some other place, the stepper motor is operated for a limited time to unlatch the solenoid operated lock so the door can be opened. At the end of the preset delay, the stepper is operated in the reverse direction and door is locked again.

    By: HBeonLabs Technology Pvt. ltd., Product assembled by HBeonLabs

     

    Click here to Download PDF

    Stepper Motor Control Using ATC Microcontroller

    Summary

    Stepper motors are used for precision position control in many applications like floppy drives, printers, process control instruments, robotics and machine tool control. The Stepper Motor Controller using the 89C51 micro-controller can accurately control the rotation direction (clockwise or anti-clockwise), speed and number of revolutions with help of six tactile switches. This module is simple and easy to construct and can be used in many application e.g. Machine control, Robotics for controlling the axial rotation in XY plane. A similar circuit can be added to control the rotation of the motor in either XZ or YZ plane.

    Learning

    Things which you will Learn:

    *Application of the AT89C51 microcontroller for stepper motor control and interfacing.
    *Implementation of the bridge rectifier.
    *Programming of the AT89C51 microcontroller in Assembly language.
    *Concepts of Stepper motor angle.

    Product Description

    Robots are the future of the World and the main element in them is the stepper motors for joins and actuatiors. So we bring you a simple circuit for controlling the Stepper motor using the IC AT89C51.

    Working:

    At the heart of the Stepper Motor Controller is an AT89C51 microcontroller. From traffic control equipment to input devices, computer networking products, and stepper motor controllers, 89C51 microcontrollers deliver a high performance with a choice of configurations and options matched to the specific needs of each application.

    In the Stepper Motor Controller circuit, the control switches for the motor are connected to Reset and Port P0.7 pins of the microcontroller while the stepper motor is connected to port pins P2.4 through P2.7 of the microcontroller (IC2) through the motor-driver circuit consisting of four Darlington pairs comprising transistors BC548 and SL100 (T1-T2, T3-T4, T5-T6, and T7-T8). 

    When transistors conduct, 5V (Vcc) is applied to the coils of the motor and the currents flowing through them create magnetic fields and the motor starts rotating. The magnetic field energy thus created is stored in the coils.

    When transistors stop conducting, the power to the coils is cut off, the magnetic field collapses and a reverse voltage (called inductive kick back or back emf) is generated in the coils. The back emf can be more than 100 volts. The diodes connected across the coils absorb the reverse voltage spike.

    Timing:

    The crystal frequency used in this circuit is 11.059MHz. The speed of the stepper motor is proportional to the frequency of the input pulses or it is inversely proportional to the time delay between pulses, which can be achieved through software by making use of instruction execution time.

    When power is applied, the reset input must first go high and then low. A resistor-capacitor combination (R1-C3) is used to achieve this until the capacitor begins to charge. At a threshold of about 2.5V, the reset input reaches a low level and the microcontroller begins to function normally. Reset switch (S2) allows you to reset the program without having to interrupt the power.

    Driver Circuit Design: Ports P0 through P3 of the microcontroller are not capable of driving loads that require tens of milliamperes (mA). The microcontroller outputs a current of 1.7 mA. To drive the coil of a stepper motor requiring a torque of 7 kg-cm, 12V DC and 2 amp/phase, a driver circuit using transistors SL100 and 2N3055 are used to amplify the current to 2.72 amp. Since the stepper motor has four coils, we need to use four Darlington pairs.

    Programming:

    The program for the Stepper Motor Controller is written in Assembly language and compiled using the ASM51 cross-assembler. The AT89C51 is programmed using Atmel Flash programmer. One step rotation of he stepper motor used in this project equals 1.8 degrees. When the motor is programmed for 200 steps, the motor makes one complete revolution i.e. 360 degrees.

    Click To View Circuit Diagram

    Click here to Download PDF

     

     

    Intelligent Metro Train Save Rs. 600.00
    Rs. 6,000.00
    Rs. 5,400.00

    Intelligent Metro Train

    Intelligent Metro Train

    by KNS Pvt Ltd
    Save Rs. 600.00
    Rs. 6,000.00
    Rs. 5,400.00

    Summary

    Future era train which has very advanced features.

    Product Description

    This project is designed so that students can understand the technology used in the now a day’s drive less metro train which is used in most of the developed countries like Germany, France, and Japan etc. These trains are equipped with the CPU, which controls the train. The train is programmed for the specific path. Every station on the path is defined; stoppage timing of the train and distance between the two stations is predefined. This is a very wonderful project to control the working of the train without a driver.

    Brand: HBeonLabs, Product assembled by HBeonLabs

     

    Click here to Download PDF

     

     

    Microcontroller Based Digital Code Lock Save Rs. 400.00

    Microcontroller Based Digital Code Lock

    by KNS Pvt Ltd
    Save Rs. 400.00
    Rs. 4,000.00
    Rs. 3,600.00

    Product Description

    Security is the prime most concern in every house hold. In this project, we use 8-bit Microcontroller to control the solenoid lock to provide access to authorized persons to a home/building by entering the password from a keypad residing out side the home/building.

    Brand: HBeonLabs, Product assembled by HBeonLabs

     

    Click here to Download PDF

     

    Stepper Motor Control Through RF Link Save Rs. 300.00
    Rs. 3,000.00
    Rs. 2,700.00

    Stepper Motor Control Through RF Link

    Stepper Motor Control Through RF Link

    by KNS Pvt Ltd
    Save Rs. 300.00
    Rs. 3,000.00
    Rs. 2,700.00

    Product Description

    A stepper motor is an electromechanical device, which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The motor's rotation has several direct relationships to these applied input pulses. The sequence of the applied pulses is directly related to the direction of motor shafts rotation. The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied.

    We can use the stepper motor to control the motion of a robot but the biggest hurdle is the wired controller. We can control the stepper motor wirelessly through RF link. In this project, we are controlling the stepper motor wirelessly through RF link. We are using RF module and an AT89S52 microcontroller to achieve this motive.

    Brand: HBeonLabs, Product assembled by HBeonLabs

     

    Click here to Download PDF

     

    Robotics Self-Learning Kit Save Rs. 200.00
    Rs. 3,100.00
    Rs. 2,900.00

    Robotics Self-Learning Kit

    Robotics Self-Learning Kit

    by KNS Pvt Ltd
    Save Rs. 200.00
    Rs. 3,100.00
    Rs. 2,900.00

    Summary

    A complete self-learning kits for engineering students and electronic aspirants for learning Robotics.

    Learning

    Using this product it will be easy to make different robotics application some of the application mentioned below:

    1. Line follower
    2. Obstacle robot
    3. Edge avoider
    4. Wall following robot
    5. Path remembering robot

    Product Description

    ThinnkWare feel proud to introduce the best product of industry "Robotics Self-Learning Kit".

    Kit content:

    Robotics Parts - Chassis, Gears, 150 RPM BO Motors, Nuts, Screws etc...
    AVR development Board with all inbuilt interfacing.
    AVR USB Programmer
    Sensor (TSOP Sensor) - 2
    USB cable
    6 Cell Battery holder with DC Jack
    Single pin burge strip (F2F) - 6
    Program CD ( Datasheet / Application notes/Software/ Sample Program)
    Assembly guide.
    LCD 16*2
    AVR theory hand book

     

    PIC Microcontroller Self Learning Kit Save Rs. 460.00
    Rs. 4,000.00
    Rs. 3,540.00

    PIC Microcontroller Self Learning Kit

    PIC Microcontroller Self Learning Kit

    by KNS Pvt Ltd
    Save Rs. 460.00
    Rs. 4,000.00
    Rs. 3,540.00

    Product Description

    ThinnkWare feels proud to introduce the best product of industry. From now to study about PIC Microcontroller (Manufactured by Microchip) you are not supposed to go to a classroom or any institution. Just be at home and learn the PIC microcontroller and its programming. We will always be with you in process of learning.

    Kit content:

    PIC development Board with all inbuilt interfacing
    16*2 Alphanumeric LCD
    Compatible PIC KIT2.
    Stepper Motor
    Sensor (TSOP Sensor)
    Matrix Keypad
    Temperature Sensor
    6 Cell Battery Holder with DC Jack.
    Burge strip connector F2F
    Program CD ( Datasheet / Application notes/Software/ Sample Program)
    Free Study Material Book.

    Online assignment and assessment will be done.

    Cellphone Operated Land Rover Save Rs. 550.00
    Rs. 2,750.00
    Rs. 2,200.00

    Cellphone Operated Land Rover

    Cellphone Operated Land Rover

    by KNS Pvt Ltd
    Save Rs. 550.00
    Rs. 2,750.00
    Rs. 2,200.00

    Summary

    A robot is an electromechanical system that has an ability to interact with the physical environment and can be programmed to do specific tasks accordingly. All robots shares features including controlled mechanical and movable structures. The controlling of a robot includes three distinct phases: Perception (Sensing) is mounted on the robot, Processing is done through on board microcontroller or processor, Action is performed by using motors or actuators. The Cell Phone Operated Land Rover implemented here is basically controlled by a mobile phone that makes a call to the mobile phone connected to the rover itself.

    In the course of a call, if any button is pressed, a tone corresponding to the pressed key is heard at the other end of the call. This tone is called ‘dual-tone multiple-frequency’ (DTMF) tone. The robot perceives this DTMF tone with the help of the phone stacked onto its body and the DTMF decoder. The received tone is processed by the ATmega16 microcontroller (Preprogrammed) with the help of this DTMF decoder MT8870, decodes the DTMF tone into its equivalent binary digit and is sent to the microcontroller.

    The microcontroller takes a decision for any given input and outputs its decision to motor drivers in order to drive the motors for forward or backward motion or a turn. The cell phone in the robot acts as a remote. Hence, this simple robotic project does not require the construction of receiver and transmitter units. Some of the main components used are: MT8870 DTMF decoder, AVR ATmega16 micro-controller,L293D motor driver and 74LS04 NOT gate.

    Learning

    Things which you will learn:
    *Learn basics of robotics!
    *Learn the application and inter facing of the DTMF decoder MT8870 with the ATmega16 micro-controller.
    *Learn the application and interfacing of the H-bridge motor driver IC L293D.

    Product Description

    Robots are always a cool toy for DIYs, hobbyist and engineers. Wouldn't it be fun if the same robot is controlled by your mobile phone sounds interesting right?. So here is the a robot kit which works on the principle of "DUAL TONE MULTI FREQUENCY"(DTMF) to help control the robots motion.

    Working

    In order to control the movement of the Cellphone Land Rover, a phone call needs to be made from the operator’s cell phone to the cell phone mounted on top of the land rover. This rover-mounted phone is responsible for providing the DTMF tone inputs to the MT8870 decoder IC which is a part of the control circuitry. This connection between the rover-mounted phone and the main circuit (PCB) is achieved through a pair of headphones (also commonly known as the “hands-free” kit). Once the call made from the operator’s phone is received at the rover’s end, any key maybe pressed on the operator’s phone to control the actions performed by the land rover.

    The DTMF tones produced by each such button-press are received by the rover-mounted phone through the call-connect. These tones are further fed to the control circuit by the headset connected to the rover-mounted cell phone. The MT8870 decodes the received tone and sends the equivalent binary number to the microcontroller’s port A (input port). According to the program burned into the microcontroller, the rover will move in a direction corresponding to this input. For example, when key ‘2’ is pressed on the operator’s mobile phone, its binary equivalent (0000 0010) is generated by the DTMF decoder IC. These bits are then inverted (i.e. 0000 0010 becomes 1111 1101) and fed to the input port A of the microcontroller. Consequently, the output generated at output port D is 1000 1001 (binary notation) i.e. port pins PD0, PD3 and PD7 are raised high. The high output at PD7 of the micro-controller drives the motor driver IC (L293D). Port pins PD0 and PD3 drive, motors M1 and M2 in the forward direction. Similarly, motors M1 and M2 move together to generate left, right, backward and stop condition motions.

    Note: It is preferable to keep the rover-mounted phone in the “auto-answer” mode. If the cell phone being used does not support the auto answering facility, the call would have to be received manually by pressing the “OK” or “answer” key. The call should be transferred to the hands-free mode so that the DTMF tone can be passed onto the input of the MT8870 decoder in the control circuit through the “tip” and “ring” connection terminals provided on the PCB.

    Click To View Circuit Diagram

    Click Here To Download PDF
    Remote Controlled Land Rover Save Rs. 301.00
    Rs. 3,300.00
    Rs. 2,999.00

    Remote Controlled Land Rover

    Remote Controlled Land Rover

    by KNS Pvt Ltd
    Save Rs. 301.00
    Rs. 3,300.00
    Rs. 2,999.00

    Summary

    The Remote-Controlled Land Rover is a vehicular model that can be controlled remotely using RF. The Land Rover can be remotely instructed to perform simple functions through appropriate push-button switches on the remote, like: -forward -backward -right -left The Remote-Controlled Land Rover is capable of stopping automatically on encountering a physical obstruction while moving in forward and reverse directions. Build this kit and enter into the world of RF controlled devices! No. of ICs used: 5

    Learning

    Things which you can learn:

    *Learn application of encoder and decoder ICs HT12E and HT12D.
    *Learn the designing of RF transmitter and receiver.
    *Concepts of DC Geared Motor.

     

    Product Description

    The Remote Controlled Land Rover operates using RF transmission. The remote control has the advantage of adequate range (up to 200 meters with proper antennae) besides being omnidirectional. The Land Rover can move in forward, reverse, left and right directions. The decoder being used for the project has latched outputs and as such the buttons on remote control need not be pressed for more than a few milliseconds.

    Working

    Forward and reverse movement: The Remote-Controlled Land Rover uses a 30-rpm geared 6V DC motor coupled to the left front wheel and another identical motor coupled to the right front wheel. During forward (or reverse) movement of the vehicle, the two wheel shafts move in opposite directions (one clockwise and the other anticlockwise). Steering control: There are different methods available for steering a vehicle. For the Lan Rover steering, the two driving wheels are independently controlled to turn. For the rear wheels, a single 5cm diameter plastic caster wheel is being used. A Caster wheel turns by 180° when the direction of the vehicle motion is reversed.

    This way the movement of the rover becomes stable in both the forward and reverse directions. The steering (clockwise or anticlockwise) motion is achieved by driving only one wheel at a time. Drive Circuit: The input terminals of the motor drive circuit for the right-hand motor have to be fed with reverse-polarity control signals compared to those of the left-hand motor drive circuit. Remote Control. For remote control, the Holtek encoder-decoder pair of HT12E and HT12D employing RF as well as IR principles, are used. Both of these are 18-pin DIP ICs.

     

     

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