BURGLAR_CHASER

Published:2009/6/14 23:07:00 Author:May | From:SeekIC

BZ..................... Mtai Horn Buzzer C1 ..............5μF 250 volts Capactto C2.............022μF Green Cap(223 K5K)D1..........................1N4O07 DiodeFT.......... Micro Strobe Tube/ReflectorL1.............................Neon Lamp Q1.................. C174O SW Transistor Q2...............................106 SOP R1......................200 ohm Resistor R2......................820 ohm Resistor R3.......................10 meg ReststorT1...................Invener TransformerT2.................... 4 kV Trtgger Coil The burglar chaser makes a great accessory for any alarm system. It creates brilliant flashes of white light and a loud, irritating sound from a metal horn buzzer. Transformer T1 is connected to Q1, R1, and R2 to formablocking oscillator. This createsaG-Vac signal on the primary ofT1. Because of T1's large ratio of turns frorn primary to secondary, the 6-Vac signal is stepped up to a level of over 200 Vac, which is then rectified by D1. The resultant dc voltage is applied to storage capacitor C1 and the neon relaxation oscillator made up of R3, C2, and L1. Each time C2 charges up to a sufficient level, it ionizes L1, which causes SCR Q2 to fire. The firing SCR causes the charge on C2 to be applied to the trigger coil. The trigger coil converts the 200 V into the 4000-V pulse that is needed to fire micro xenon strobe tube/reflector FT. The cycle repeats itself after the strobe tube flashes.



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