Audio Modules / Amplifiers
The PAM8403 5V Two-channel Stereo is a 3W 3W, class-D audio amplifier. Allowing it to achieve high-quality sound reproduction. The new filter less architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of Class-AB cousins. It can extend the battery life, which makes it well-suited for portable applications.
Features :
- Dual channel stereo, high output power (3 w 3 w power @ 5V and 4 ohms load)
- Good sound quality
- Double panel wiring solves crosstalk
- Super mini design allows it to be easily placed in a variety of digital products
- 3W Output at 10% THD with a 4ΩLoad and 5V Power Supply
- Filter less, Low Quiescent Current and Low EMI
- Superior Low Noise
- Short Circuit Protection
- Thermal Shutdown
Application :
- Bluetooth Stereo Audio hands-free/headsets
- In robots that speak or generate sounds to indicate activities
- Portable Speakers
- LCD Monitors / TV Projectors
- Arduino or Raspberry Pi Game Machines
- Speaker Phones
Package Includes:
1 x PAM8403 5V Two-channel Stereo Mini Class-D Audio Amplifier
we now have an all in one digital audio amp breakout board that works incredibly well with the Raspberry Pi! If you're looking for an easy and low cost way to get your digital sound files bumpin' then the MAX98357 I2S Amp Breakout is for you. It takes standard I2S digital audio input and, not only decodes it into analog, but also amplifies it directly into a speaker. Perfect for adding compact amplified sound, it takes 2 breakouts (I2S DAC Amp) and combines them into one.
I2S (not to be confused with I2C) in a digital sound protocol that is used on circuit boards to pass audio data around. Many high end chips and processors manage all of the audio in digital I2S format. Then, to input or output data, three or four pins are used (data in, data out, bit clock and left-right channel select). Usually, for audio devices, there's a DAC chip that will take I2S in and convert it to analog that can drive a headphone.
This small mono amplifier is surprisingly powerful - able to deliver 3.2 Watts of power into a 4 ohm impedance speaker (5V power @ 10% THD). Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, it's incredibly efficient - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell it got hot.
The audio input is I2S standard, you can use 3.3V or 5V logic data. The outputs are "Bridge Tied" - that means they connect directly to the outputs, no connection to ground. The output is a ~300KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly.
There's a Gain pin that can be manipulated to change the gain. By default, the amp will give you 9dB of gain. By connecting a pullup or pull down resistor, or wiring directly, the Gain pin can be set up to give 3dB, 6dB, 9dB, 12dB or 15dB.
The Shut Down/Mode pin can be used to put the chip in shutdown or set up which I2S audio channel is piped to the speaker. By default, the amp will output (L R)/2 stereo mix into mono out. By adding a resistor, you can change it to be just left or just right output
Works great with Raspberry Pi, Arduino Zero, and any other microcontroller or microcomputer with I2S audio outputs
Specification and Features:
- Output Power: 3.2W at 4Ω, 10% THD, 1.8W at 8Ω, 10% THD, with 5V supply
- PSRR: 77 dB typ @ 1KHz
- I2S sample rates from 8kHz to 96kHz
- No MCLK required
- Click Pop reduction
- Five pin-selectable gains: 3dB, 6dB, 9dB, 12dB, 15dB
- Excellent click-and-pop suppression
- Thermal shutdown protection
- Dimensions (L x W x H) mm: 19.4 x 17.8 x 3.0
- Product Weight: 1.2g
Comes as an assembled and tested breakout board, with a small piece of optional header and 3.5mm terminal block. Some soldering is required to attach the header and terminal block if those are desired.
Note: The terminal block included with your product may be blue or black.
Package Includes:
1 x Adafruit MAX98357A I2S 3W Class D Amplifier Breakout Board
It can used on the computer's USB port on 5v power supply or on a mobile phone charger USB port 5v power supply battery power can also be used on High Efficiency: 90 percent can provide 3w (left channel) 3 w (right channel) output power in the 4o load and 5v power supply conditions a class, b class amplifier such efficiency is only about 30 percent d class amplifier is highly respected today d class amplifier efficiency is extremely high, not because of temperature affect the sound but do not add heat sink and take less space noise cancelling circuit was built in the amplifier board power on / off without pop noise module has a short-circuit current protection and over-temperature protection application: LCD Tv's, monitors, laptop portable speakers portable DVD players, game consoles phone / speakerphone specifications operating voltage: 2.5v-5.5v speaker with: 4-8ohms recommended: 4 ohms speaker power: 2-8w size: 21 x 18 x 3.4mm(l x w x h) Color: as the pics show net weight: 1g note: first turn and then powered speakers, or likely to cause damage to the chip ;do not let too much leaving the audio signal input signal cut limiter miniature digital power amplifier board 2x3w class d power amplifier board, can work on USB power supply. Good noise suppression input audio should be via Sheilded wire dual channel stereo output 3 w 3 w power works with 5v power supply can directly drive 4 o/8 o small speakers big output power, sound is good. Unique without lc filter class d digital power board can use computer USB power supply directly double panel wiring, super mini design, can easily fit in a variety of digital products high amplification efficiency made with solid plate welding machine
Package Includes:
2 x CA-8403 Micro Digital Power Amplifier Board
Bluetooth MP3 Decoding Board Module with SD Card Slot / USB / FM / Remote Decoding Board Module is compact size Music player which can be installed anywhere like in your vehicle, on Home Theater Speakers system. If you have an old conventional Music system without USB/AUX/Bluetooth Support, then this device will be the right choice to add these all feature in your music system. It can also be used to build your own music system.
All You need is an amplifier board & speaker to use this module. The module comes with Bluetooth FM USB and mp3 audio board with LCD display with IR remote control. The player has Multiple sources of input i.e. AUX, Bluetooth, USB, SD card along with FM radio.
The LCD display shows the information of Track number, Selected Input Source, and Selected FM Frequency.
Precautions:
- This kit is not for the electronics hobbyist. Proper knowledge about the subject is required to understand and make the complete project. We do not hold any responsibility for any issues or help either due to negligence, ignorance or lack of proper knowledge about the subject.
- This unit is used to feed an amplifier, from the amplifier you can drive the speaker. Do not connect speakers directly to this unit.
Features :
- Comes with IR Remote Control
- Stereo Digital Audio Output
- Can be used as an audio receiver
- Support USB/TF Card Slot/Bluetooth/FM/AUX switching, also supports folder selection and playback
- Stereo Bluetooth with a call can also receive hands-free calls
- DIY speakers and modified audio/car rare weapon
- Support MP3/WMA/WAV/FLAC/APE format music
- Can be used to play songs from USB, SD card, Bluetooth, and FM radio
This 5.1 channel USB Sound Card is multipurpose USB to 3mm Audio jack dongle. It is simply a plug and play device which does not need any driver software to run on your computer. This Audio adapter can also be used with Raspberry pi Board for audio output and input for recording. This module supports 5.1 channel output and 3D sound.
It is demand For the cheap replacement to the failed audio card in a laptop and Desktop computers. The USB powered adapter requires no external power. It can be paired with a USB hub or a USB extension cable for flexible installation. The dongle is convenient to use USB to audio adapter provides a spare to travel with your laptop.
The External USB 2.0 Sound Card Adapter can work with all major operating systems like Windows 98SE/ ME/ 2000/ XP/ Server 2003/ Vista/Windows 7,10, Linux, Mac OS, etc. Lightweight and portable size makes it convenient to take everywhere.
Audio adapter with no external drivers required; Plug in the adapter, configure the sound settings on your computer and enjoy. USB powered adapter boosts the signal of your headset, speakers, or microphone.
Support 3d sound (Ac-3)and virtual 5.1 soundtracks, the best entertainment for the game and new sound systems.
Features :
- Plug and Play device no software installation needed
- Easy and portable
- Works and all major operating systems
- Supports 5.1 Surround and 3D sound
- No external power supply needed
- Boost the signals for Headsets
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