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

Ultrasonic virtual screen prototype

People are always looking for new ways of interaction to computer. So far keyboard and mouse are still the most reliable and common way to do so. Of course touch screen is another wide spread method of user input. All of those require physical touch to device in order to enter info. But there are many areas where we would like to manipulate things from distance. Possible applications could be hazardous areas, wet or other places where it would be better to control things, enter information from distance without touching anything. Magiciant have been experimenting with ultrasonic radar based user input. All you need is to draw with pen in the air in front of ultrasonic sensor and information is captured in to computer screen. Hardware setup is accessible to anyone because it is based on popular Arduino DUE, four HC-SR04 ultrasonic sensors and four channel MCP6024 buffer amplifier. Other magic is inside software where Fast Fourier transform does quite a job. Out of four ultrasonic sensors only one sends pulses while all four capture reflection. By combining collected information… Continue reading

Virtual keyboard from acceleration sensing glove

SMD chips, there is more potential of using them on a virtual gloves. The glove we are talking about was designed in University of California, Berkeley by Professor Kris Pister students. This glove along with proper software is capable to translate hand gestures in to computer symbols. Glove has Analog Devices ADXL202 dual axis accelerometers stacked on each of fingers and one additional on back of the hand. SO whole hand movement can be recorded by Atmel AVR microcontroller which sends data to computer via serial port. It can send data via RF channel if needed (not implemented currently). Microcontroller sends raw data to PC where software has to interpret it in to rotations in order to define hand gesture. Here is a publication article about calculations that software does to recognize gestures. Project files including Orcad hardware, microcontroller ASM code and PC receiving software C source code are free to download and analyse. Continue reading