pushycat
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« Reply #225 on: May 30, 2020, 03:20:20 15:20 » |
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Gesture Controlled Wheel Chair Using ATmega32 (EFY Feb2017) Wheelchairs are useful for people for whom walking is difficult or impossible due to some illness, injury or disability. There are different types of wheelchairs. Manual wheelchairs are pushed using their handles. Motorized wheelchairs, are driven by joystick. Voice-controlled wheelchairs are the latest development. These can be driven just by giving voice commands. A more advanced and intelligent version of the wheelchair is controlled directly through human mind, such as the one used by renowned scientist Stephen Hawking. In case a person is unable to move the wheelchair even with joystick or voice command, an alternative is gesture-controlled wheelchair. The wheelchair moves as per user’s finger gestures. The user has to simply bend his fingers to move the wheelchair. Here we present the project to control a wheelchair through finger gestures. It uses flex sensors to record finger gestures. The gesture signals are fed to ATmega32 microcontroller, which processes the information to control four DC motors in order to move the wheelchair in any desired direction. Flex sensors are widely used to convert finger gestures into equivalent electrical signals. These are actually variable resistors, whose resistance changes when these are bent in either direction. This change in resistance is converted into an equivalent voltage, which can be used for further processing.
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pushycat
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« Reply #226 on: June 02, 2020, 05:50:50 17:50 » |
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DIY Automatic Water Refiller (EFY March 2018) Air coolers provide cool air in a room by adding moisture to the air. This moist air is blown inside the room by an exhaust fan or blower, which makes the room temperature drop. These coolers require frequent refilling of water. Presented here is a circuit to refill water automatically in an air-cooler tank when the water drops below a predetermined level. It is built around NE555 timer (IC1), transistor BC547 (T1), reed switches (S1 and S2), and a few other components. IC1 is configured similar to bi-stable mode, the only difference being that switch S1 is connected to pin 6 instead of pin 4.
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pushycat
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« Reply #227 on: June 15, 2020, 01:12:01 13:12 » |
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Software Defined Radio (EFY March 2018) Software-defined radio (SDR) is one of most important wireless communication technologies. It is a unique type of radio system that can tune to any frequency band. The SDR platform is generic, that is, one platform supports various signals of different frequencies. Earlier, SDR hardware was designed only to support high-end computer systems and desktop computers. However, with recent advancements in smartphone technology and availability of affordable smartphones, developers have started working on SDR support for mobile phones.RTL-SDR dongles can easily perform the function of an SDR receiver using an Android smartphone with on-the-go (OTG) support.
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pushycat
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« Reply #228 on: June 20, 2020, 01:46:59 13:46 » |
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Virtual Telepresence Robot suing Raspberry Pi (EFY March 2018) This robot with a camera is placed in a remote location to capture the environment in visual form using Raspberry Pi (RPi). The captured visuals are displayed on the user’s virtual reality (VR) headset. An added feature allows the camera to move in the direction of the user’s head movements. This gives the user a real-time experience as if he is present where the robot is located. The robot can also be moved in any direction through an app installed in the user’s smartphone.Virtual reality The video captured by RPi camera can be viewed on a smartphone placed in the virtual reality (VR) headset. The project lets the user experience virtual reality through VR headset. Dual-screen mode is enabled in the smartphone for this purpose. The smartphone reads the accelerometer and magnetometer data of the direction in which the user turns his head, say, right or left. This data is sent to the modem over Wi-Fi and to the RPi board, which, in turn, provides these values as inputs to the servo motors. Two servo motors are used to move the camera—one for the vertical movement and the other for the horizontal movement. So when you turn your head along with VR headset to the right side, the RPi camera will also turn to the right direction.
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pushycat
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« Reply #229 on: July 03, 2020, 04:58:46 16:58 » |
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Automatic Certificate Generation Using MATLAB (EFY April 2018) MATLAB is a versatile tool that can automate many tasks. Presented here is a MATLAB code to generate certificates for workshops, conferences, symposiums, etc. Conventionally, educational institutions and companies use specialized tools for report cards and certificates generation on a large scale. This MATLAB code can be extended to generate analysis reports for large data sets as well. File name of the blank certificate (A) is used as input in the code. Details to be written on the certificate are obtained from an Excel sheet (B). The data is written over the blank certificate and many such certificates are generated by the MATLAB code (C). The certificates generated by the program can be saved in a folder with a unique file name (D).
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pushycat
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« Reply #230 on: July 22, 2020, 07:06:45 19:06 » |
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Vehicle tracking system based on GPS and GSM (EFY April 2018) Presented here is an Arduino based system for vehicle tracking using global positioning system (GPS) and global system for mobile communication (GSM) modules. GSM modem with a SIM card used here uses the communication technique of a regular cellphone. The system can be installed or hidden in your vehicle at a suitable location. After installing this circuit, you can easily track your stolen vehicle using a mobile phone.
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pushycat
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« Reply #231 on: September 24, 2020, 04:33:32 16:33 » |
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GPS Clock Using Arduino (EFY May 2018) Global positioning system (GPS) synchronised clocks give accurate time. These clocks are universal and commonly used at railway stations, bus stands and airports. These are widely used for military purposes too. Here we describe a GPS clock based on Arduino Uno R3—an AVR ATmega328-based microcontroller board with six analogue inputs pins and 14 digital input/output (I/O) pins. The microcontroller has 32kB ISP flash memory, 2kB RAM and 1kB EEPROM. The board provides serial ommunication via UART, SPI and I2C.
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pushycat
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« Reply #232 on: October 09, 2020, 10:09:04 10:09 » |
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Touchscreen and GLCD Based Home Automation (EFY May 2018) This project controls home electrical appliances using a touchscreen input device. The system comprises two relays for controlling a bulb and a fan as an example. The touchscreen placed on a graphical LCD acts as a control panel for sending control commands through a pair of wireless radio frequency (RF) communication modules. The touchscreen panel on the transmitter side interfaced to a microcontroller sends on/off commands to the receiver where the loads/appliances are connected. By touching the specified portion on the touchscreen panel, the loads are turned on/off remotely through the wireless RF modules.
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pushycat
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« Reply #233 on: October 18, 2020, 07:55:36 19:55 » |
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WIRELESS LCD DISPLAY Via Bluetooth (EFY May 2018) This wireless LCD display shows information sent from a smart phone. The user can send text messages with up to 32 alphanumeric characters to the LCD within Bluetooth range of about 10 metres. This project can be extended and implemented in many ways for: 1. Educational organisations (schools and colleges). To inform any changes in the timetable or important information 2. Hospitals. To inform a doctor’s name and her or his department 3. Restaurants. To inform the kitchen staff 4. Offices. To inform the status (busy, available, out of the office, etc) of the boss inside the office
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mitsos
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« Reply #234 on: October 19, 2020, 08:17:58 08:17 » |
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This IR Remote Can Control Up To Eight Devices (EFY May 2020) This project based on an 8-bit ATmega328P microcontroller (MCU) can control up to eight devices connected to its electromagnetic relays. The article also describes how to program an MCU to accept infrared (IR) remote control signals for controlling the relays. Here, an ordinary TV remote control is used along with the 28-pin ATmega328P MCU in DIL package and Arduino bootloader to control the devices.
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« Last Edit: October 19, 2020, 10:53:20 10:53 by mitsos »
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pushycat
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« Reply #235 on: October 29, 2020, 05:32:07 17:32 » |
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Touchscreen And GLCD Based HOME AUTOMATION (EFY May 2018) This project controls home electrical appliances using a touchscreen input device. The system comprises two relays for controlling a bulb and a fan as an example. The touchscreen placed on a graphical LCD acts as a control panel for sending control commands through a pair of wireless radio frequency (RF) communication modules. The touchscreen panel on the transmitter side interfaced to a microcontroller sends on/off commands to the receiver where the loads/appliances are connected. By touching the specified portion on the touchscreen panel, the loads are turned on/off remotely through the wireless RF modules.
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