BLE Voice

In recent years, as living standards improve and work pressure increases, more and more households have begun relying on smart appliances to simplify housework. As a new category of home appliance, robot vacuums have gained significant attention for their intelligent and autonomous capabilities. With the evolution of robot vacuum functionality, the introduction of the KT148A voice chip has opened a new chapter in human–machine interaction. Design Requirements for Robot Vacuum Voice Solutions Lack of real-time feedback during cleaning may cause user anxiety Complex operation leads to demand for guided instructions Insufficient intuitive alerts when the device encounters abnormalities or faults Chip Selection: Why Is the KT148A the Top Choice for Robot Vacuums? As an industrial-grade voice IC designed specifically for smart home devices, the KT148A has become the ideal choice for robot vacuum manufacturers thanks to its core strengths. Traditional robot vacuums only provide simple feedba...

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KT148A Voice Prompt Chip Makes Automatic Car Wash Machines Smarter! Car maintenance is an essential part of every car owner's daily life, and car washing — as a basic maintenance step — is increasingly valued for its convenience and level of automation. In this context, fully automatic car wash machines have emerged and become widely used in the car care industry. Because the car wash process is fully automated, many first-time users may not know how to operate it. Therefore, many manufacturers of automatic car wash machines incorporate voice prompts into their product designs. When users operate the machine, voice prompts can guide them through the process and mode selection, for example: Starting clean water rinse; Starting foam cleaning mode; Disinfection mode; Cleaning complete — wish you a pleasant driving experience! This makes the machine more user-friendly and convenient to operate. To achieve voice prompt functionality, an automatic car wash machine needs a voice chip ....

1. Problem Description When using the KT148A serial version voice chip to play music, the microcontroller (MCU) malfunctions immediately. After measurement, it was found that the power supply fluctuates significantly whenever music playback begins. According to the manual, this is likely due to insufficient drive capability , but when the same power supply is connected to your official test board , the MCU works normally. 2. Analysis The root cause of this issue is quite clear — power supply instability . This is a common problem and can be resolved with basic circuit design practices. First, note that the KT148A chip has two power supply configurations , as shown in the figure below (pay attention to the power supply notes in the upper-right corner). Next, the current consumption of the chip depends on two main factors: Speaker impedance and power rating — the larger the speaker, the higher the current draw. Playback volume — the higher the volume, the greater the power ...

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Question: Is the built-in 320KByte memory of the KT142C voice chip insufficient? Are there other solutions? The KT142C voice chip comes with 320KBytes of built-in memory . You can find detailed information about this in Section 4.3 of the chip manual, as shown in the diagram below. Here's a detailed explanation of why it's 320KBytes: Although the KT142C chip has a total internal memory of 512KBytes , part of it is used for firmware storage , and another portion is reserved for system memory management . The remaining space —about 320KBytes —is available for the user to replace and store custom voice data. Unfortunately, there isn't any additional free space to expand within the chip itself. If 320KBytes is not sufficient for your application, the only option is to choose a design with external Flash memory . In this case, the available voice storage capacity depends entirely on the size of the external Flash chip you use. Advantage: Storage space can be ex...