Hand DIY A NE555-based simulated impersonation device

The cat is a mouse's natural enemy, using an electronic device to simulate a cat called acoustic ruthenium is an effective method. Because it is an electronic device, the cat is very small, can be slow, the interval can be short, and the circuit structure is simple, the cost is low, suitable for electronic lovers homemade for home. The working principle is shown in the following figure. Composed of a time control circuit, a cat called sound, a power amplifier circuit, and the like. The time control circuit is composed of a time-based circuit IC1 NE555 and its peripheral blocking element, a diode or the like. It is a pulse oscillator that is tuned, and its duty cycle is controlled by R2 and R3. The cat is called by a CMOS integrated circuit IC2 KD-5605, and the cat is cured inside the circuit using storage technology. Power amplifier uses a general-purpose high-power audio amplification integrated circuit IC3 LM386 with price cheap, it is that the peripheral components are extremely small, wide, distortion, and simple assembly. Close the power switch S, IC1 is powered by power, and there is a pulse output on the IC1 output 3 feet. When there is a pulse, the relay J excitrates, its normally open contact J1 is turned on, makes the post-level circuit to work, and the cat is called, each triggers IC2, there is a kind of cat called output, after IC3 power is enlarged Push the speaker BL to make a loud and realistic sound. Make the mice to fade and reach the purpose of the trice. In the selection of components, IC1 uses a 555 type time base integrated circuit; IC2 selects the KD-5605 sound integrated circuit; IC3 is selected for LM368. The relay uses JRX-13F small relays. The speaker BL should select 8Ω, 3W or more speakers or dedicated tubular speakers, and the remaining devices Wu special requirements. In addition, the circuit is installed, as long as the line is correct, it is generally used normally without debugging.

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