Christo Radev

Self Emploied

Research include possible mechanical, hardware and software aspects of a multivariant platform for creating of completely open source S.T.E.A.M. robots even with limited resources and knowledge. Among many public projects reviewed appropriate Linux single bords computers with multicore MCUs was assessed as performance, availability and price.

This is an unified application running on a single core MCUs like ATMEga328, ATMega32U4, AVR128DB48 and multicore ESP32 and RP2040 platforms. It includes SPI connected 3.2" TFT 240x320 display for all of them with important development details and results from the performance tests done. For multicore platforms modified version include web and web...

Multichannel Electricity Monitoring (MEM) System for capturing analyzing and viewing of home consumption.

Rhodopes Mountain is ethnobotanically poorly studied, but our preliminary observation in a number of settlements revealed that even nowadays, the local population relies solely on previously collected medicinal plants. We aimed to assess the contemporary use of medicinal plants in the Central and East Rhodopes and the health conditions that local c...

Software system for capturing, analyzing and viewing of weather data and related power generated by small wind turbines.

Traditional knowledge of medicinal plants and their uses has been well documented in Bulgaria in the past. However, we know little about the contemporary traditional application of medicinal plants. Rhodopes Mountain is an ethnobotanically poorly studied region. This region is suitable for conducting field research in ethnobotany for several reason...

The goal is to test and document complete procedure of STM32Cube, FreeRTOS and ChibiOS based projects evaluating in unified environment composed by free and open source tools only. Used hardware is STM32-E407, STM32-H405 and USB3300 development boards.

History and results of 3 phase Axial Flux Ironless Generator with NdFeB Permanent Magnets and advanced test suit development and testing

The project goal is to test and document complete procedure of firmware creating of Embedded Linux system based on Ångström OpenEmbedded project. Ångström was started by a small group of people who worked on the OpenEmbedded, OpenZaurus and OpenSimpad projects to unify their effort to make a stable and userfriendly distribution for embedded device...

The project goal is to test and document complete procedure of firmware creating of embedded real time system based on ChibiOS for STM32F4 (Cortex M4) development boards. It is used only open source staff in the evaluation process.

OSGi based distributed video surveillance system is developed in the video stream management part by implementing of platform-independent system for decoding, encoding, transcoding, transmission and management of video on demand over the network; managing video cameras in a shareable manner; automated discovery of network video devices, identificat...

Development System for user defined C++ like object oriented language was developed as a student project. The system is based on transputer multiprocessor system hosted on IBM PC/AT & Windows or MS DOS. It was developed special Windows and DOS server software for maintaining of editing, pre-processing, compiling and executing of programs written on...

Multiprocessor system based on transputer technology is developed as add-board for both IBM-PC/XT/AT and Motorola’s VME-bus. Up to 9 - INMOS T414, 1 - INMOS T212; programmable Link Switch and Link Adapter is incorporated on a single board. System is developed to be compatible with INMOS B004 transputer system. A number of tests were developed under...

A large amount of software written as scientific libraries on mainframes is available by now. The Demonstration project for IAEA - Vienna was started to trace the way for transferring of this know-how on a new platform such as transputers. Compatibility tests and performances measurements during the tests are discussed and qualified as very success...

Floppy disk subsystem for single and double density is developed for computer system in standard CAMAC based on LSI-1123. Subsystem is based on MC6800 microprocessor family and Intel 8272 floppy disk controller IC. Appropriate interface for Q-Bus with DMA is developed. Special firmware written on assembler is developed granting full compatibility w...

Universal subsystem for control of up to four 8" and 5" floppy disk drives is developed. It can be used in MC6800 based microprocessor system in CAMAC standard. New subsystem is compatible with disk operating systems MDOS and CDOS when 8" floppy disk drives are used. In case of using of 5" floppy disk drives or more than 2 devices the OS has to be...

An automated system for the control of laser technological processes has been developed. The system consists of a pulsed periodic TEA CO 2 laser, an optical laser beam focusing system, an accurate X-Y coordinate table and a microprocessor control system. The developed system is used for tuning of thick-layer resistors, contouring of thin layers, an...

Some mechanical and electrical constructive decisions connected to the Repetitively-Pulsed TEA CO2 Laser are described. Its operation has been tested in two regimes: 1) He-containing mixtures; 2) Non He-containing mixtures. The maximum achieved energy in pulses is 10J. The maximum pulsed power is 100MW. It has been shown the possibility of operatio...

The X-ray emission of a laser plasma from metal targets in a 26 kV cm −1 electric field was investigated experimentally. A train of 0.53 μm picosecond pulses was used in the experiment. Targets with Z-number ranging from 13 to 74-Al, Ni, Cu, Mo and W were placed in a specially designed vacuum chamber. X-ray pulse amplitude, space distribution and s...

The X-ray emission of a laser plasma from metal targets in a 26 kV cm–1 electric field is investigated experimentally. A substructure of the X-ray pulse, corresponding to the laser pulse train period is found. The spectrum of the radiation in the range 2–25 keV is measured.

The temporal characteristics of the X-ray emission from a laser irradiated Al target in a 20 kV/cm electric field are measured with electronic detectors. Spatial and spectral distributions of the X-ray radiation are evaluated using a pinhole camera and filter technique.

The X-ray emission of a laser plasma from metal targets in a 26 kV cm−1 electric field was investigated experimentally. A train of 0.53 μm picosecond pulses was used in the experiment. Targets with Z-number ranging from 13 to 74 – Al, Ni, Cu, Mo and W were placed in a specially designed vacuum chamber. X-ray pulse amplitude, time structure, spatial...