Movable Alarm Clock

This project is for the people who faces difficulty in waking up early in the morning or have the habit of snoozing the alarm. In short, this alarm clock runs away from the user as he tries to snooze his alarm. The whole unit is mounted on a chassis with caterpillar-style wheels driven by two small DC motors. The runaway feature is implemented using a proximity sensor which is placed near the snooze button. It has all the features of a “regular” alarm clock: settable time and alarm, snooze, and alarm on/off. The project is divided into four levels namely the clock feature with display. The alarm feature motion control and proximity detection. The alarm tone is generated using a 555 timer while a real timer kernel is implemented on … Continue reading

Laser based projector

This is again a final year project by Melissa and her team, who all are students at Cornell University. The electrical part of the project consists of Galvanometer and the microcontroller which acts as an input to the position detector sensor and also are responsible for control loops which have been implemented using proportionate derivative controller. The mechanical part consists of a combination of different devices which makes up the laser projector. A part of the software runs on a Linux based PC which handles file parsing, point scanning, frame display, and serial transmission to the control board. For this laser projector, the moving and still parts of the galvo are switched around. The current running through the coils causes the rotary motion of the magnet, and subsequently, both the … Continue reading

Autonomous Goalie

This project will definitely be liked by people who loves playing air hockey. In short term, it’s a low cost robot which detects a puck coming towards it and moves in its required direction to stop it. The great point of the project is, it’s highly responsive and doesn’t use any robotic arms to stop the puck. The heart of the project, an ATMEGA 1284 MCU, takes in echo patterns from each of the sensors, interprets them and accordingly actuates the robots motors. Moreover, it requires negligible human input and can also be powered from a battery based source. Due to multiple tasks running simultaneously, they have used a tiny real time kernel to execute task in a coordinated manner which has made the robot more responsive to the puck. … Continue reading

Infrared based Mouse control

infrared

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 … Continue reading

Heart Rate monitor

heart

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, … Continue reading