Cockroach, cockroach, cockroach... Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Home, household, hobby
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Cockroaches are known to be attracted to smell. They are lured into a trap with odorous bait. Its design can be of any shape: in the form of a cylinder, a parallelepiped, a cube ... On the inner wall along the perimeter there are two conductive copper foil plates. The material of the trap itself is foil textolite or other metallized plastic. On fig. Figures 1 and 2 show the dimensions of the prismatic and cylindrical traps. Please note that the unpainted part indicates the conductive layer. Finished parts are glued together with BF-2 glue or epoxy.
Rice. 1
The electrical circuit is shown in fig. 3.
Fig. 3
To obtain a high voltage (about 1200 V), a multiplier circuit operating from a 220 V household network is used. At the output of the circuit, capacitor C5 is charged up to 1200 V. Capacitor type - K15-5, capacitance 1000-1500 pF, voltage 1600 V. Capacitors C1 -C4 type MBM with a capacity of 0,01 μF, voltage 750 V. Diodes D1-D4 type KD105G, MD217, 2D108 A, B or others for a voltage of at least 750 V. For decoupling from the network and safe operation, resistors R1-R4 are included in the circuit type MLT 0,25-0,5, each not less than 10 MΩ, which satisfies the Rules for the operation of electrical installations.
The whole circuit is placed in a rectangular plastic soap dish and connected to the trap by a vinyl-insulated electrical wire to power household electrical appliances.
According to the author, the trap works flawlessly. And as bait, he used fresh beer, a solution of fresh yeast with sugar.
Author: N.Kazarnov
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