Hi, My name is Dmytro Marchenko. In my portfolio, are a few of the devices that I’ve developed. I believe my strong points are my Creativeness and Punctuality. Since 1998, I am developing and repairing of various electronic devices. Developing electronic circuit diagrams, printed circuit boards ( PCB ), programming microcontrollers AVR and ARM STM32. Also from 2007, I am developing a devices for GPS navigation and various additions to navigation systems GPS.