Audio Module/ Amplifier

1. Item Type: Amplifier Board
2. Model: HF69B
3. Supply Voltage: 5VDC or 3.7V lithium battery
4. Applicable Speaker Impedance: 4 ohms, 6 ohms, 8 ohms
5. Charging Interface: When using a lithium battery, the charging interface can be charged with a 5 volt power supply or a mobile phone charger to charge a single lithium battery.

1. Bluetooth version: 4.2
2. Supply current: 1A
3. Power supply voltage: 5V
4. Max. Audio Output Power: 10W
5. No soldering Required on Module

1. MP3 file format:
2. support all bit rate 11172-3 and ISO13813-3 layer3 audio decoding
3. Sample rate support (KHZ): 8/11.025/12/16/22.05/24/32/44.1/48
4. support Normal, Jazz, Classical, Pop, Rock and other sound effects
5. UART interface: standard serial port, TTL level, baud rate can be set
6. Input voltage: 3.2V-5V (best 4.2V);
7. Rated current: 20ma

1. Input: 5V(DC)
2. Operating current (without signal output state): less than 15 mA
3. Operating current (with signal output state): less than 40 mA
4. Chip: KT403A
5. Chip LDO output voltage: 3.3 V
6. Chip output current: 100 mA(at Max.)

1. Module Type: TDA8932 35W
2. Operating Voltage: Single DC10 ~ 30V
3. Recommended Voltage: 24V
4. Current: Above 2A Switching Power Supply
5. Output Power: 35W x 1
6. Speaker Impedance: 4-8 ohm, 8 ohm best
7. Circuit configuration: Mono BTL Output

1. Excellent durability and coexistence
2. Guarantee the stability of Bluetooth transmission through multiple technologies
3. Intuitive LED indication
4. Bluetooth 4.2 Version
5. Wireless transmission distance ≥ 10 meters
6. Adopt the latest Bluetooth 4.2 protocol, backward compatible with other versions of Bluetooth protocol

1. Comes with IR Remote Control
2. Stereo Digital Audio Output
3. Can be used as an audio receiver
4. Support USB/TF Card Slot/Bluetooth/FM/AUX switching, also supports folder selection and playback
5. Stereo Bluetooth with a call can also receive hands-free calls

1. Working Voltage: 3.7V Lithium Battery 600MA or 5V USB Power Supply
2. With Power supply, it can play Automatically
3. With Multifunction LED indicator
4. Supports MP3 format playback
5. Supports USB audio mode

1. Onboard LM386 Chip.
2. 200 multiplier benefits circuit design.
3. On-board speaker wiring Block.
4. On-board 10K variable resistor, you can adjust the volume of the enlarged.
5. Onboard power indicator.

1. Amplifier Chip: PAM8403
2. Operating Voltage: DC 5V.
3. Output Power: 2x 3W.
4. Applicable Speaker Impedance: 4/6/8 ohm
5. PCB Board Size: 42 x 25 x 5 .

1. Input Voltage: 2.5-5.5 V(USB power supply).
2. Output Impedance: 4 ohms.
3. Efficiency: 90%.
4. Frequency Response: 150 Hz – 20 kHz.
5. Input Impedance: 2 Kohm.

The MT8870 module is a low power device DTMF decoder chip. It is a complete DTMF receiver integrating both the band-split filter and digital decoding functions. This module is suitable for modem interfaces, mobile radios and other DTMF related applications.

PAM8406 Digital Amplifier Module With Volume Control Potentiometer is an excellent noise suppression module. If you don’t receive input audio, you will not hear any noise on your ears.

1. Module chip using PCF8951
2. Module supports external voltage input of the 4-way acquisition (voltage input range of 0-5v)
3. The module integrated photoresistor by AD collection precise value of the ambient light intensity
4. Module integrated thermistor by the precise value of the ambient temperature of the AD acquisition
5. Module integrated 1 channel 0-5V voltage input acquisition (the blue potentiometer to adjust the input voltage)
6. Modules with power indicator (for the module power supply indicator lights)
7. Modules with DA output indicator, when the module DA output interface voltage reaches a certain value, will be lit panel the DA output indicator, the higher the voltage, the more obvious indicator brightness

1. Operating voltage: 6 to 12V DC
2. Onboard TDA2030A Audio amplifier IC
3. Mono channel 18W Power amplifier circuit design
4. Onboard horn socket
5. 10 k adjustable resistance to adjust the volume of the amplification
6. Onboard power indicator light
7. Chip has lead to the main pin, can directly input the audio signal

1. Can be accessed by two 4-8Ω 10-50W speakers
2. A large volume of small size
3. High signal to noise ratio
4. An upgraded version of the radiator, wider and thicker, better cooling effect
5. Fit for Bookshelf speakers, CRT televisions, radios, and other small amplifiers

1. Dual-Channel Stereo Output
2. Run-on 10V to 26V power Supply
3. PowerSSO -36 EPU Package
4. Much higher efficiency in terms of cost and performance than competitors’ IC’s

1. 25 W + 25 W continuous output power at THD = 10% with VCC= 20 V and RL= 8 Ω
2. Wide-range single-supply operation (8 – 26 V)
3. High efficiency (η = 90%)
4. Four selectable, fixed gain settings of nominally 21.6 dB, 27.6 dB, 31.1 dB and 33.6 dB
5. Differential inputs minimize common-mode noise
6. Standby and mute features
7. Short-circuit protection