Electronic trap for insects is the lamp of the fluorescent lamp serving as a decoy for insects. Before the lamp is stretched grid from two thin metal conductors to which a high voltage. So the trap was safe for people outside of the casing of the lamp nets from the fishing line.
In this trap is applied a fluorescent lamp with power of 20 watts. She is included in network using the voltage multiplier, assembled diodes (VI - V4 and capacitors C1-C4. This eliminated the need for starter and throttle - parts characteristic conventional switching circuits. In addition, for suitable now even with the lamp blown filaments - the glow of light occurs due to the high voltage between its electrodes.
For high-voltage metal mesh applied the Converter is assembled on the diacs under the scheme of the relaxation oscillator. Powered from mains via the rectifier diode V5 - V8. In moments, when the capacitor C5 is charged up to voltage enable dynistor (in other words, breakdown voltage), through the primary winding of the transformer T1 flows the current pulse, and then the capacitor begins to charge again. In just a second the capacitor will have charged and discharged about 1000 times, that is, the frequency pulses is 1 kHz. With the same frequency pulses appear on the secondary the winding, but the tension reaches 1000 V is voltage and is fed to metal conductors of the grid.
Step-up transformer wound on a ferrite core from a flyback transformer (FA) TV Record. The winding of I contains 20 turns of wire Sew-1 0 0.5 mm, winding II - 1300 turns of PEV-1 to 0.1.
Capacitors C1, C2 - type CSR-5; NW, C4 - MBGC a voltage lower than 400 V; C5 - MBM voltage of 500 V. the Resistors R1 and R2 with a capacity of not less than 15 watts. Here convenient to use vitrified resistors type sew, but the fit and resistors MLT-2,0 in parallel connection. Thus, the resistor R1 can be composed of eight parallel connected resistors 240 Ohms, and R2 is the same the number of resistors resistance of 12 ohms.
Diodes DB can be replaced by other rectifier diodes, designed for reverse voltage not less than 400 V at currents up to. 200 mA. In the absence of a dynistor CNG suitable CNV or KIND, but this changes the frequency of the pulse generator (in the first case, it will increase, will decrease in the second), and, except also, the voltage on the grid of the trap, it will fall over when using diacs KNW and will increase with diacs KIND.
Authors: V. Baganov, Dmitry Lazarev, B. Ivanov