Electronic sound bait for fish. Scheme, description

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Electronic sound bait for fish. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Home, household, hobby

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Every year, traditional types of baits for catching fish are becoming more expensive: cereals, derks, compound feed, etc. The way out is the use of electronic lures. At one time they were popular, but then interest in them gradually disappeared. I offer a tested scheme of electronic bait. Large fish swims to the sounds of low frequency, which are emitted in the reservoir by small crustaceans. A school of small fish, when feeding, makes sounds of a higher frequency, to the sound of which larger fish also gather. The range of pond sounds is from 200 Hz to 13 kHz. Each type of fish produces sounds of its own frequency, as well as sounds of its frequency attract it. The fishermen determine the type of fish and its quantity by the frequency emitted by a flock of fish.

Electronic sound bait for fish. Scheme

Figure 1 shows a diagram of an electronic lure. The circuit consists of a pause duration multivibrator on the elements DD1.1, DD1.2 and a short pulse shaper on the elements DD1.3, DD1.4. The pause duration shaper is actually a frequency generator. The frequency can be smoothly changed with a variable resistor R2. The load of the short pulse shaper, except for the piezoceramic emitter, can be any telephone capsule with a resistance of 50 ohms.

Electronic sound bait for fish. Pay

Figure 2 shows the layout of the printed circuit board of the electronic lure. The device is assembled in any plastic box where a 6F22 (Krona) type battery and a variable resistor with a beak are placed. For the beak, it is desirable to apply digital marks, so that with a successful bite one day, the next time you can set the desired frequency.

The emitter must be well sealed with silicone sealant or epoxy. It is necessary to seal only the edges of the membrane and the wire connections. The membrane itself must be in contact with water, so it is desirable to cover it with a thin layer of waterproof varnish. The wire of the required length must be checked for the integrity of the insulation. To do this, dip it in salted water and measure the resistance between the water and the wire. It should be large (megaohm). It is necessary to start the frequency selection from a lower one, i.e. the slider of the resistor R2 should be in the extreme right position (according to the diagram).

The device consumes low current and the battery lasts for a long time, but the volume decreases. The power switch can be omitted, and after the end of fishing, turn off the battery, and install it in the case without contact with the connector.

Publication: cxem.net

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