Intelligent Upgrade of Air Disinfection Machines: In-Depth Analysis of the Application and Selection

Air disinfection machines disinfect the air through principles such as filtration, purification, and sterilization. Their functions not only include killing bacteria, viruses, etc., but some models can also remove organic pollution gases such as formaldehyde and phenol, kill or filter allergens such as pollen, and effectively remove cigarette smoke, bathroom odors, and human body odors. They have a reliable disinfection effect and can disinfect in the presence of people, enabling co - existence of humans and the machine.

I. Design Requirements for the Voice Scheme of Air Disinfection Machines

For most users, thick instruction manuals are daunting. The key is to quickly get started and operate the air disinfection machine proficiently. Therefore, an intuitive and user - friendly voice scheme design is of great importance. This scheme enables users to easily control various functions of the air disinfection machine through concise voice commands, eliminating the need to refer to complex instruction manuals.

II. Application of KT142C Voice Chip in Air Disinfection Machines

Qingyue Electronics has developed a low - cost and high - performance Flash voice chip that endows products with voice prompt functions. It adopts a small SOP16 package, has an internal PWM output that can directly drive a 0.5W speaker, and also supports 24 - bit high - quality DAC output. The chip has a massive 320 - second storage space inside. This series of voice chips features a single - chip solution, a short production cycle, and is suitable for large, medium, and small - scale batch production. Even for small - quantity production, goods can be obtained in a timely manner.

III. Reasons Why Engineers Select the KT142C Voice Chip

1. Wide Voltage Range and Simple Circuit: The chip supports a wide voltage range of DC2.5V to 5.2V for power supply, and the power circuit design is extremely simple, requiring only a 104 coupling capacitor.

2. Low Power Consumption: The static current is less than 50mA, and the low - power operating current does not exceed 50μA, ensuring low - power operation and extending the device's battery life.

3. High - Quality Audio Output: It has an internal 24 - bit DAC output, a dynamic range of 90dB, and a signal - to - noise ratio of 85dB. It supports arbitrary switching between DAC output and PWM direct - drive speakers and can be externally connected to a class - D amplifier to achieve high - quality audio playback.

4. Working State Monitoring: It has an internal BUSY status output, which is convenient for the system to monitor its working state.

5. Large Capacity and Rewritable: It has an internal 320 - second voice space and supports repeated burning.

6. Diverse Control Modes: There are diverse control modes, including serial port commands and IO button triggering, providing rich interface options and facilitating integration with various control systems.

7. MP3 Hard Decoding: It supports MP3 audio file hard decoding without the need for format conversion. The audio sampling rates are 8/11.025/12/16/22.05/24/32KHz.

8. Fine - grained Volume Control: It supports 30 - level volume control, meeting the need for fine - grained audio adjustment.

9. Stable Circuit Design: It has an internal LVR low - voltage reset circuit, effectively preventing abnormal reset caused by unstable voltage and improving system stability.

10. Convenient Voice Update: It supports connection to a PC. Voice files can be directly downloaded and updated through a USB interface without installing any software. It supports systems such as XP, WIN7, and WIN10. Manufacturers can flexibly customize voice content according to their needs, such as startup greetings, operation feedback, and fault alarms.

11. Combined Playback Function: It supports the combined playback function and can achieve time reporting and temperature reporting, which can, to a certain extent, replace some expensive TTS solutions.

The application design scheme of the KT142C voice chip has mature application cases in products such as smart homes, household appliances, medical devices, and security alarms. In the future, Qingyue Electronics will launch standardized voice chips in more industries, further enhancing the design experience of engineers and enabling standardization in various industries.

Product details, product information, and sample acquisition and ordering links: KT142C