Everyone knows that insects flying and ground, rush to the source light. This "weakness" can be used to control pests of the garden and vegetable garden.
The light bulb lit at night in the garden, getting connected with a vacuum cleaner the socket. Through certain time intervals, the length of which set depending on the accumulation of insects in a light area include vacuum cleaner. The intervals of his work sets the multivibrator transistors V1, V2 (Fig. 9).
The variable resistor R2 of the pause between keys in them and regulate cleaner up to 120 min. Running the appliance for 20 with - closed until the contact plate PCM relay K1-2 (passport 1017.181.02). C1, C2 - electrolytic capacitors K50-6.
Day to the same device you can connect a tape recorder, on which is written bird-scaring sounds, or movable puhala.