Cockroaches are known, attracted to the smell. Odorous bait lure them in trap. Its construction may be of any shape: in the form of a cylinder, parallelepiped, a cube... On the inner wall on the perimeter are two a conductive plate made of copper foil. The material of the trap - foil PCB or other metalized plastic. On Fig. 1 and 2 shows the dimensions of the prismatic and cylindrical traps. Please note, the unpainted part is a conductive layer. Finished parts are glued together between the BF-2 or epoxy.
Fig. 1, 2
The electrical circuit shown in Fig. 3.
Fig. 3
For high voltage (about 1200) is used, the multiplier circuit is powered from the mains 220 V. On the output of the circuit the capacitor C5 is charged up to 1200 V. the Type of capacitor - K15-5, capacity 1000-1500 pF, voltage of 1600 V. the Capacitors C1-C4 type MBM capacitance of 0.01 μf, a voltage of 750 V. the Diodes D1-D4 type CDG, MD, D A,B or other for a voltage of less than 750 V. For decoupling from the mains and secure in the circuit of a resistor R1-R4 type MLT 0,25-0,5, each not less 10 MW, which satisfies the Rules of operation of electrical installations.
The entire circuit is placed in a plastic soap dish in rectangular shape and is connected with the light trap in vinyl insulation to power household appliances.
According to the author, the trap perfectly. And as bait he used fresh beer, a solution of fresh yeast with sugar.
Author: N. Kazarinov