Every year more and more traditional types of baits for catching fish: cereal, derki, feed, etc. the way out is the use of electronic lures. At one time they were popular, but then the interest in them gradually disappeared. Offer a proven scheme e-bait. Big fish floats to sounds of low frequency, which are published in the pond small crustaceans. The flock of small fish during feeding makes sounds higher frequencies, the sound which is also going bigger fish. The range of sounds of the reservoir from 200 Hz to 13 kHz. Every kind of fish make sounds of their frequency, as well as attract it sounds its frequency. Fishers is determined by the frequency produced by the school of fish, type of fish and the quantity.
Figure 1 shows a diagram of electronic lures. The circuit consists of a multivibrator, the duration of pauses on the elements DD1.1, DD1.2 and the shaper short pulse on the elements DD1.3, DD1.4. Shaper the duration of the pauses is the actual setpoint frequency. The frequency can be continuously changed by the variable resistor R2. Load the shaper short pulses, except piezoceramic emitter, can be any a Cup, impedance of 50 Ohms.
Figure 2 shows the layout of the PCB electronic lures. The device going into any plastic container is placed where the battery type 6F22 (Krone) and variable resistor with a beak. For the beak, it is desirable to apply a digital label that when successful Kleve in one day, next time you could put the desired frequency.
The emitter must be well sealed with silicone sealant or epoxy. Sealing need only the edges of the membrane and wiring. The membrane itself must have contact with water, so it is desirable to cover with a thin layer of waterproof varnish. Wire lengths should be checked for insulation integrity. To do this, dip it in salted water and measure the resistance between water and living wires. It should be large (Megami). To start the search for frequencies with a lower, i.e., the engine resistor R2 must be in the rightmost position (the scheme).
The device consumes low current and the battery lasts for a long time, but the volume decreases. The power switch can be left out, and after fishing to disconnect the battery, and install into the housing without contact with the connector.
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