Onomatopoeia integrated circuit design

The power supply voltage of the KD-9562 8-analog sound integrated circuit is 1.5~4.5V, and its output can directly drive the speaker to make sound. It is called an 8-analog sound integrated circuit because it can make 8 different sounds, such as thunder, machine gun sound and police car sound. The characteristics of this integrated circuit are low power consumption and stable and reliable performance. When installing and welding, in order to prevent electrostatic induction from breaking down the tubes in the circuit, the power plug of the soldering iron should be unplugged, and the soldering time should be as short as possible. It is not advisable to use a high-power soldering iron to avoid damage to the integrated circuit.
The KD-9562 8-analog sound integrated circuit is a CMOS circuit produced by the Xiaoshan Crystal Tube Factory in Zhejiang Province. Its appearance provides certain convenience for the application and simplification of electronic circuits, and can make it multifunctional.
1. Typical circuit
The typical application circuit of the KD-9562 8-analog sound integrated circuit is shown in Figure 1. Using the band switch K2 to convert the contacts, different analog sounds can be obtained, which can be used for children's toys, etc.
The resistor R in the figure is an external resistor with a resistance of 150~240kΩ, which is used to adjust the time of each simulated sound.
The original design is to simulate 8 different sounds. When more than two contacts are connected at the same time, other sounds will appear, making the sound change unpredictable and difficult to guess.
2. Infrared transmitter
The circuit used for the infrared transmitter is shown in Figure 2. It uses two infrared transmitting tubes to replace the output load. Due to the low power supply voltage, it is suitable for the HG410 series low-power infrared transmitting tubes. By changing different connections, different infrared output waveforms can be obtained.
When you want to increase the infrared transmission power (such as using infrared medium-power transmitting tubes), you can use the dotted line connection method in the figure to appropriately increase the working voltage of the infrared transmitting tube.

Figure 1 Figure 2
If the infrared emitting tube in the circuit is replaced with a light-emitting diode indicator, it will be a flash indicator, which can be used as a variety of light signal display.
3. Trigger
The circuit of making a trigger with KD-9562 is shown in Figure 3. It uses the signal voltage output by the collector of the transistor BG to trigger the corresponding control circuit. The circuit shown in the figure triggers a high-power flash. The bidirectional thyristor should be selected according to the load current. To ensure that the bidirectional thyristor is not overheated and burned, the rated current of the thyristor should be greater than 1.5 to 2 times the load current, and the rated working voltage should not be less than 600V. When wiring, the cathode of the thyristor should be connected to the neutral line, and the anode to the phase line (i.e. the live wire). Different trigger frequencies can be obtained by selecting different wiring pins.

Figure 3
4.
Pager The circuit of the pager is shown in Figure 4. It can be used in wards, hotels, etc., for patients or travelers to call medical staff or waiters. According to the different sounds, the room to be called can be identified, which is simple and convenient. It is a simple eight-way pager that can be installed by the hospital or hotel itself. The 8 buttons are installed in eight rooms, and the sound generator is installed in the duty room.

Figure 4
5. Phase sequence reverse connection notification device
The phase sequence reverse connection notification device circuit is shown in Figure 5.

Figure 5
When the A and B phases of the three-phase power supply are connected to the A and B phases of the test terminal (i.e. the corresponding ends of the symbols), the current of phase A and phase B are 120° out of phase, cancel each other out, no current is output, the thyristor is in the off state, and the integrated circuit does not work without working power. When the A and B phases are connected in reverse order, the A phase current lags behind the B phase current by 60°, and there will be a current output of about 4mA, triggering the thyristor SCR to turn on, connecting the power of the integrated circuit, and causing the speaker to sound an alarm of reverse phase connection.
This reverse phase connection annunciator can be used for on-site testing, and can also be installed at the work site as an annunciator for long-term reverse phase connection.

6. High-frequency signal generator
The circuit of the high-frequency signal generator is shown in Figure 6. The audio signal emitted from the KD-9562 integrated circuit is amplified by the transistor BG1 and coupled to BG2 by the capacitor C1 for modulation. The modulated high-frequency signal is then modulated by the tuning circuit composed of the inductor L and the capacitor C3, and the high-frequency signal of a certain frequency is radiated into the air, becoming a simple transmitter. Changing the capacity of the capacitor C3 can change the transmission frequency.
If you want to increase the power of the transmission frequency, you can use the dotted line method in Figure 2 to increase the working power of the transmitter without affecting the safe operation of the integrated circuit.

Figure 6
7. Electronic magic ball The
electronic magic ball is basically the same as the typical circuit, except that the control switch is different, as shown in Figure 7. The switch in

Figure 7
is in a hollow spherical body, and the radial thin copper sheets as shown in Figure 40-7 are pasted. Among them, 8 are separately set and connected to the 8 sound output ends of the KD-9562 integrated circuit respectively, and another group of radial thin copper sheets are connected to the negative pole of the power supply. There are two metal balls with equal diameters in the spherical switch body, and the sum of the outer diameters of the two balls is slightly smaller than the inner diameter of the spherical body by 0.3mm. In this way, when the electronic magic ball rolls, the two small metal balls also roll in the spherical switch body, and two or one contact points are connected, which will make an unpredictable sound.
The shape of the electronic magic ball can be made into a round, square or other arbitrary shapes. The spherical switch body should be fixed in the magic ball, and any shape can also be used.
8. Baby urination alarm
The baby urination alarm is made using the KD-9562 sound-imitation integrated circuit, and its circuit diagram is shown in Figure 8.

Figure 8
Urinary sensor can be made using a single-sided copper-clad insulating board. When making it, take a single-sided copper-clad board with a diameter of 10 to 15mm (square is also acceptable), cut a gap of 1 to 1.2mm in the middle, and then weld two thin soft wires, which is a good urine sensor. When using it, just clamp the urine sensor between the baby's diapers.
9. Low-frequency signal generator
The circuit of the low-frequency signal generator is shown in Figure 9.

Figure 9
When using KD-562 sound-imitation integrated circuit as a low-frequency signal generator, two metal probes are connected to the collector of the transistor BG and the negative pole of the power supply respectively, and it is a low-frequency signal generator, which can be used to repair radios, etc.
10. Alternating sound generator
In order to make the sound-imitation circuit emit two different simulated sounds alternately, the circuit shown in Figure 10 can be used. In the circuit of

Figure 10
, a multivibrator is used to control any two sounds in KD-9562 to sound alternately, and the normally open contact and the normally closed contact of the 3V relay J are used to switch alternately to achieve this. According to the needs of the sound, any two output terminals in KD-9562 can be controlled. When the two alternating simulated sounds are boring, the other two signal output terminals can be replaced.