An electronic flash device which is protected from thermally damaging a lamp holder supporting a flash tube even when the flash tube is lighted in a consecutive manner for a prolonged period of time. A generalized gesture-to-action mapping framework allows users to intuitively define and modify such mappings. Present cooling model structure must use over 2 fans to reduce the working temperature of the projector and keep the projector functional. The random transmission of pulses in a non-periodic manner promotes a significant immunity to periodic interferences of constant noise operating in a surveillance area. Subsequently, the second pulsed-power device is operated to produce current that is used to further charge the HTS in the first pulsed-power device. The through holes are arranged in an oblique and helical manner.