Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

NFC based Transmitter and receiver

This project has been made without using a commercially available NFC module. Instead of using the module, they have used coupled coils to transmit message modulated by a high frequency carrier, whose frequency is the standard frequency for Near Field Communication (NFC). A similar coil is also used, both of which are tuned to resonate at the frequency of 13.56MHz. The modulation of the carrier takes place using a MCU. A similar MCU is also used to demodulate the signal and display on LCD. The transmitter block includes user interface (ATmega1284p), local oscillator (13.56MHz carrier generator) and antenna (LC Tank). The receiver block includes a antenna, demodulation and ADC Circuit (unity gain amplifier and hysteresis comparator with inverting-input) and signal processing unit (ATmega1284p). The reader should keep in mind that… Continue reading

A Device to create, collaborate music

This is a final year project by students of Cornell University which permits companions to learn melodies, make their own particular tunes, and collectively consolidate them. There are basically two pedals each having eight sets of fully customizable buttons and any button can be used to play and MIDI sounds. The device also allows you to record your music in real time and also offer functionality for playback. However, the different feature of this device is its ability to transfer music to your friend which can then merge their melodies with yours. The transmission takes places through a set of IR transmitters and receivers There is also a teacher mode which allows you to practice playing pre-programmed songs. The prototype uses pulse-width modulation and direct digital synthesis to play back… Continue reading

Automatic Liquid Mixer

This project is done by Justin and Austin who studies at Cornell University. This project doesn’t require any human interaction except placing the glass at the correct position to make a mixture of drinks. The user can select the required drink from up to 16 predefined drinks and then all he has to do is place the glass, the project will do the rest. They have used a bidirectional DC motor and solenoid valves to turn an ordinary Lazy Susan into a rotating platform system that could move a glass under inverted bottles and dispense liquids in a controlled manner, in order to make mixed drinks. A Atmega1284 MCU is used to control the liquid flow and its movement. The entire code is programmed using AVR studio and the language… Continue reading

Gesture operated security lock

This project allows you to store and use your own gesture to unlock a security lock. This can be especially useful for people with physical disabilities particularly in their fingers. The attractive feature of the project is that the user makes the pattern in the air and not on any surface. The pattern can be change any number of times and also saves you from the hassle of carrying a key to unlock locks. The gestures are captured by using four infrared sensors placed in the box within the range from 10 to 80 cm. The analog output obtained from the infrared sensors is fed to the internal ADC of the microcontroller, in this case its Atmega 128p, which maps the corresponding analog readings to the equivalent digital output. Apart… Continue reading

Gimbal System for UAV’s

There have been wide variety of gimbal used on UAV’s to capture stable video or still images. A directly mounted camera is never an option for A UAV due to vibrations as well as it reduces user control on the camera direction. The control board for the Gimbal comprises of an onboard 6-Axis IMU, a GPS module headers, connection for servo and an Atmega128 micro-controller. The GPS unit on-board the UAV will provide the Stabilized Gimbal Controller the ability to sense its absolute position on earth. This will help the gimbal to point at the required position all the time, irrespective of UAV heading. An Atmega128 micro-controller is used for the project since it has more number of timers, PWM output lines, and serial communication interface than any other comparable… Continue reading

Self-Made GPS assister

We all have at one point or the other user our smartphones to navigate to a place. This device does exactly this, accepts it’s made from scratch.  Also it can be used when you want to follow a certain specified path from another user who have already used your device. This device could be used for hide-and-seek, or some sort of exciting maze game and hence can promote children to play outside. The data from the compass and GPS are taken into the microcontroller, and is then processed to determine where the user is in space, and which direction they are facing. Based on these data, the device then generates feedback on whether or not they are getting closer to the right place, or are even facing the right direction.… Continue reading