★ Board Specifications:
↳ Board Number: HXYT-A005-07E
↳ Board Version: V1.1
↳ Board Type: Audio Mini Amplifier
1. Audio Connector:
↳ Type: Auxiliary (AUX)
↳ Function / Work: The AUX connector on this board is a standard audio input jack, typically 3.5mm in diameter. This allows you to connect various external audio sources like smartphones, MP3 players, or computers to the amplifier. The signal received through the AUX is analogue, which the amplifier then processes and outputs through the speakers.
2. Memory Card Slot:
↳ Quantity: 1
↳ Type: Mini Slot
↳ Function / Work: The board includes one mini memory card slot, likely designed for microSD cards. This slot allows for direct playback of audio files stored on a memory card. The compatibility is typically with formats like MP3, WAV, etc. The mini slot's compact size is ideal for saving space on the board.
3. Crystal IC:
↳ Specification: 24.000M
↳ Function / Work: This refers to a 24.000 MHz crystal oscillator. Crystal ICs are critical for providing a stable clock signal for the digital circuits on the board. In an audio amplifier, the clock may be used for timing functions in digital signal processing (DSP) or for other timing-critical operations. The 24 MHz frequency is common in many audio and microcontroller applications.
4. Power IC / Control IC / Audio Generator IC:
↳ Quantity: 1 piece
↳ IC Number: PNQA15E7E
↳ Other Number: UJA199
↳ Function / Work: The Power IC (PNQA15E7E) serves multiple roles, including power management, control, and audio signal generation. This IC is likely a specialized chip that handles the power distribution to various parts of the amplifier, controls different functions (such as switching between inputs, and volume control), and possibly generates audio signals if it includes an integrated DAC (Digital-to-Analog Converter). The other number (UJA199) might reference a specific part of the IC's specification or a related component used in conjunction with the primary IC.
5. Audio Amplifier IC:
↳ Quantity: 1 piece
↳ IC Number: HAA9809
↳ Other Number: K2K13
↳ Function / Work: The HAA9809 is the core amplifier IC responsible for boosting the audio signal to drive the output speaker. This IC is likely a class D or class AB amplifier, known for its efficiency in portable audio devices. The other number (K2K13) could be a batch code, manufacturing date, or a secondary identifier related to the IC's configuration.
6. LEDs:
↳ Charging LED: Red
↳ Audio Running and On LEDs: Blue, Red, Green
↳ Charging LED: A red LED indicates the battery or device charging status. It lights up when the device is charging and might turn off or change colour when fully charged.
↳ Audio Running and On LEDs: Multiple LEDs in blue, red, and green are used for different status indicators. Blue could signify power on or active playback, red might indicate errors or specific functions, and green could be used for power on or different modes.
7. Charging IC:
↳ Specification: 5V, 3A, 5-pin connector / Simple Diode.
↳ Function / Work: This IC manages the charging process for the device's battery. It converts the incoming 5V supply (typically from USB) into the correct charging voltage and current (5V, 3A) to safely charge the connected battery. The 5-pin configuration usually includes connections for power input, ground, battery connection, and possibly a data line for charge control or status feedback.
8. Switch:
↳ Details: 4-pin switch (On/Off, Volume +, MP3 Next, Volume -, MP3 Reverse, LED Function)
This switch controls various functions on the board. Each pin is likely connected to a different
function:
↳ On/Off: Powers the device on or off.
↳ Volume +: Increases the audio volume.
↳ MP3 Next: Skips to the next track when playing from a memory card.
↳ Volume -: Decreases the audio volume.
↳ MP3 Reverse: Rewinds or plays the previous track.
↳ LED Function: May toggle the LED status or change modes.
9. Audio Output Speaker:
↳ Quantity: 1
↳ Power: 5W
The board is designed to drive a single 5W speaker. This speaker is the output device that delivers the amplified audio signal to the listener. A 5W speaker is suitable for small, portable devices, offering decent sound quality while maintaining a low power requirement.
10. Battery Slot:
↳ Quantity: 1
↳ Specification: 4.2V, 3Ah, 1 Watt supply
↳ Function / Work: The battery slot is designed to hold a single rechargeable battery, likely a lithium-ion type, with a nominal voltage of 4.2V and a capacity of 3Ah. This provides a moderate amount of power, suitable for portable operation. The 1-watt supply specification indicates the power drawn from the battery, which could be for standby or low-power modes.
11. USB Connector:
↳ Details: Only Audio Support / Output 5V
↳ Function / Work: The USB connector is primarily used for audio input/output, with a secondary function of providing 5V output, possibly for charging a connected device. The audio support implies the USB may also serve as a digital audio interface, receiving audio data from a connected device.
12. Switch:
↳ Details: 4 pieces (On/Off, Volume +, MP3 Next, Volume -, MP3 Reverse, LED Function)
↳ Function / Work: This appears to reiterate the switch functions previously described, emphasizing that there are four main functional controls available via the switch.
13. Audio Output Slot:
↳ Quantity: 1
↳ Power: 5W
↳ Function / Work: This slot is where the audio output is connected. It matches the specifications of the audio amplifier and the speaker and is designed to handle up to 5W of power. This slot may be a 2-pin or 4-pin connector depending on whether it's mono or stereo output.
↳ Overall Functionality and Integration:
This board integrates several key components for a compact and functional audio mini amplifier. The combination of inputs (AUX, memory card), processing (via Power IC and Audio Amplifier IC), and outputs (speaker, LEDs) ensures that it can handle multiple audio sources, amplify the signal, and provide visual feedback to the user. The charging and battery management features make it ideal for portable applications, where maintaining power efficiency and managing charging cycles are crucial.