Engelleyi̇ci̇ LEDli̇ Güvenli̇k Si̇stemi̇

In this thesis, we designed and developed a prototype of a non-lethal system using light emitting diodes (LEDs) as the light source. The system, which is called a Blocker Security System with LEDs (BSSL), sends a light beam whose color and light intensity are changed in time (spectrally, temporally) according with certain pre-programmed patterns. It was observed in the literature that these changes in light patterns cause headache, nausea, dizziness and visual defects on people who are exposed to them.These effects are observed when the change in light pattern from the LEDs is fast enough so that human's brain could not process properly the information transmitted, and therefore, it cannot decode the changes in the speed they come. In the thesis, experiments are made, and measurements are performed by using the designed and developed Blocker Security System's prototype, and assessments of the experimental data have been performed to find the most effective patterns of the light. We searched the patterns that cause the desired effects on the people and tried to find the best pattern. The subsystems of the BSSL, mainly the LEDs, the optical system that guides the light beams from the LEDs, the cooling system, the battery system, the body, and the LED drivers that generate the required light patterns were investigated. We focused mostly on the drivers that not only provide the necessary forward currents to the LEDs, but also generate the lighting patterns required from them. In doing this, we developed the embedded software required to form the lighting patterns through the driver.