BLE Voice

Power Supply Explanation for the KT1025A BT201 Bluetooth BLE Audio Chip—Minimum, Maximum, and Most Suitable Supply Voltage 1. Pin 18 of the module is the chip's power supply input, supporting 3.2V to 5.2V.  2. Pin 12 is the module's internal LDO output—it's an output, pay attention!! 3. For pins you don't understand, just follow the schematics we provided and copy them. About the chip's power supply and usage tips: 1. The chip is designed for “lithium battery” power scenarios, so pin 18 is named “VBAT,” meaning battery power. The chip's optimal working voltage is around 4.2V, but connecting directly to 5V is completely fine. 2. It supports a wide voltage range of 3.2V to 5.2V . Even slightly lower may work, but testing is required. 3. To support lithium battery power , the chip has a built-in 3.3V LDO to power the chip's core, so the IO operates at 3.3V levels. 4. Pin 12 is the LDO output. When the supply voltage of pin 18 exceeds 3.3V, pin 12 outputs...

  1. Brief Overview 1. First, please refer to the provided BT201 test DEMO module as the standard. 2. If using the chip independently without testing the BT201 module and directly proceeding to layout, background noise is highly likely if experience is limited. Therefore, always compare with the manufacturer’s test board first. 3. The BT201 solution does not include FM functionality. Please note this. The FM circuit should be left floating without hesitation 2. Precautions 1. Background noise or interference is common in Bluetooth audio products. Do not be careless during layout. 2. If you have not worked on audio products before, study online resources thoroughly. Assuming things casually will naturally lead to noise issues. 3. The core principle is to separate analog ground and digital ground. If unclear, consult an experienced engineer. 4. Ensure a clean power supply. Use an LDO whenever possible instead of a DC-DC converter. 5. Bluetooth operates at high-frequency RF and radiat...

  I. Introduction KT6368A Bluetooth Module: Explanation of Methods for Obtaining Bluetooth MAC Address on iOS Systems or Phones During APP development, customers often encounter issues with iOS. Therefore, we have summarized and categorized the solutions here, hoping to assist everyone. The core focus lies in the handling on the Bluetooth chip side. Since we do not have APP development capabilities, the collected information and experience are based on communication with customers. Many of these customers' APP or mini-program developments involve our full participation, so we can provide some practical suggestions in this regard. There are differences in obtaining the Bluetooth module's MAC address when developing APPs for Android and iOS: 1. Android systems provide an interface for obtaining the Bluetooth module's MAC address, so it can be used directly. This includes Android-side WeChat mini-programs or other mini-programs. 2. iOS, however, is more restrictive and does no...

In today's interconnected world, Bluetooth technology meets not only audio transmission needs but also plays a key role in data transfer. The KT1025A chip offers excellent Bluetooth data transmission features, supporting two main modes: BLE and SPP. BLE Transparent Transmission: A Power-Efficient Solution Designed for low-power applications, BLE is ideal for devices requiring long operation times with minimal power consumption. KT1025A supports standard BLE data transmission, ensuring stable connections and data interaction between devices. This makes it a top choice for smart home and health monitoring devices. SPP Transparent Transmission: A Classic and Reliable Option Based on the classic Bluetooth protocol, SPP provides higher data transfer rates and stability. It's perfect for applications needing fast and reliable data transmission, such as industrial control and medical data collection. Flexibility and Reliability in Data Transmission Whether using BLE or SPP mode, KT102...

The KT1025A, used in the BT201 module, is a solid choice for cost-sensitive Bluetooth audio applications. Below is a detailed breakdown based on available information: 👉 KT1025A (BT201) Overview ✅ Bluetooth Version: Bluetooth BLE5.0 and SPP2.1 ✅ Audio Features: 🔹16-bit stereo DAC for decent audio output. 🔹Supports basic codecs like MP3, WAV, FLAC, and APE formats, suitable for standard-quality audio streaming. 🔹I2S and PCM interfaces for connecting to external audio components. 🔹Supports external power amplifiers, as you've noted in your previous work with the BT201 for applications like electronic keyboards or voice toys. ✅ Control: UART interface for easy integration with microcontrollers, making it developer-friendly for embedded systems. ✅ Power Consumption: Optimized for low-power applications, ideal for battery-powered devices like toys or small IoT gadgets. ✅ Use Case: Best for budget-friendly projects requiring basic Bluetooth audio, such as smart home devices, voice-a...

Voice chips have become indispensable components in modern electronics, enabling applications ranging from simple alert tones to interactive voice systems. As technology advances, the market has diversified into distinct chip categories, each catering to specific needs in cost, functionality, and audio quality. In this article, we explore the five primary types of voice chips, their characteristics, and ideal use cases. I. Market Classification of Voice Chips Voice chips are categorized into five types: Type Features Recommendation OTP Voice Chips - Mask (OTP) type, one-time programmable. - Short playback, poor audio quality, non-rewritable. - Low cost but high MOQ. Example: "Vehicle Reversing Alert" Recommended for high-volume, cost-sensitive, low-quality applications. Otherwise, avoid. Flash Voice Chips - Built-in or external Flash storage. - Uses WAV encoding (e.g., WT588D, ISD series). - Cumbersome voice burning; requires dedicated tools. - Mediocre audio quality. Not rec...