Mobile phones are a modern staple of most people’s lives today. Social media and technological innovation have made them crucial to corporate and private life, so when you lose signal on your device, it could throw your entire day off. WiFi isn’t always available in the workplace. Sometimes architecture of a building or a campus thwarts signal coming from nearby.
Sometimes an individual lives in a community primarily rural, and may only have several towers servicing several thousand. It’s easy to fall through the cracks in a world of seven billion, and though cellular companies work round the clock to increase signal, sometimes there’s just no way to ensure all constituents in all areas will be able to have stellar service all the time. The solution is to give clients the power to boost their signals personally. Mobile phone booster technology is a great way to bring signal to rural or industrial areas where it just can’t be found, and there are many reasons it could come in handy. But just what is it? Continue reading
Arduino have evolved into popular development platform with variety of boards, shields and strong community. It’s simplicity and robustness allows tweaking, designing and building things even if you have are little or no experienced in electronics and microcontrollers. Today Arduino comes in many different shapes and processing power. Gearbest team was so kind to supply Arduino Mega 2560 R3 featuring ATmega2560 microcontroller. This is most powerful AVR based Arduino having 54 I/Os, 256KB flash, 4KB of SRAM and 4KB of EEPROM.
This project moves and clicks a mouse cursor on a computer screen by tracking where the user’s eye-movements using infrared eye-tracking technology and a gyroscope. It can be useful for people with physical disabilities and provide them with a way to control the monitor. Instead of using a camera they are using a combination of LED’s and phototransistors which have reduced the cost of the project by a huge margin. The LED’s used are mounted on a custom made spectacles like think, which doesn’t restrain user from making any movement and hence giving this device an edge over other products presently available.
All of these glasses-mounted components namely the LED system along with the gyroscope are connected to a microcontroller, which parses the LED and gyroscope data into USART packets and transmits it wirelessly. The packets are read by a wireless receiver on a separate ATMega1284P board, which moves the mouse cursor using a Java program based on the information received. The LED’s used are low power LED’s which also doesn’t damage the user eye. You can read more about this project on the project website.
This project by the undergraduate students of Cornell University allows you to measure your heart rate along with blood pressure through the use of optical based sensors. Their intention is to gather data for large-scale analysis for the automatic prediction of heart disease. The heart of the project is the ATMEGA 1284p, which is used to control the infrared LEDs that will transmit light which is reflected back to the light to frequency sensors.
The microcontroller takes in the signals that reflect pulsatile measurements, and will digitally process these signals into pulse measurements, and send the data through either USB or bluetooth to a PC. The PC will have a GUI that graphically shows the two pulses and the blood pressure and pulse. The mouse unit contains the mouse controller, a mega1284P microcontroller, an ultrasonic sound transmitter, three ultrasonic sound receivers and an XBEE wireless transceiver. The base station contains a mega32 microcontroller and an XBEE wireless transceiver. A GUI has also been created to observe the data without any use of additional tools. The complete mathematics along with the schematics of the project can be found on the project website.