Item Type: Amplifier Board Model: HF69B Supply Voltage: 5VDC or 3.7V lithium battery Applicable Speaker Impedance: 4 ohms, 6 ohms, 8 ohms 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.
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
Product: Adafruit Electret Microphone Amplifier ?? MAX4466 with Adjustable Gain Adjustable gain You can set the gain from 25x to 125x Excellent power supply noise rejection
Excellent durability and coexistence Guarantee the stability of Bluetooth transmission through multiple technologies Intuitive LED indication Bluetooth 4.2 Version Wireless transmission distance ?? 10 meters Adopt the latest Bluetooth 4.2 protocol, backward compatible with other versions of Bluetooth protocol
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
Mini design, portable and easy to use. It is the audio-style connectors that you see on some phones, MP3 players, and development boards. Dimensions: 18 x 12 x 6(L x W x H) mm Weight: 2 gm
The board can be connected to two mobile phones. It comes with the call function and the default volume of the largest. Can be used for many applications like Bluetooth Headset
Sampling rates (kHz): 8/11.025/12/16/22.05/24/32/44.1/48 24 -bit DAC output, support for dynamic range 90dB , SNR support 85dB Fully supports FAT16 , FAT32 file system, maximum support 32G of the TF card, support 32G of U disk, 64M bytes NORFLASH A variety of control modes, I/O control mode, serial mode,?AD button?control mode
Single-Supply Operation (2.5V to 5.5V) 3.2W Output Power into 4I at 5V 2.4mA Quiescent Current 92% Efficiency (RL = 8I, POUT = 1W) 25?VRMS Output Noise (AV = 15dB)
Gain range: 1 to 1000 Noise: 35 nV/??Hz RTI noise at 1 kHz Single- or dual-supply instrumentation amplifier Low power, 550 μA maximum supply current 20 μs settling time to 0.01% (G = 10)
Onboard LM386 Chip. 200 multiplier benefits circuit design. On-board speaker wiring Block. On-board 10K variable resistor, you can adjust the volume of the enlarged. Onboard power indicator.
Supply Voltage Operation: +2.4V to +5.5V. Versions with 5nA Complete Shutdown Available only (MAX4467/MAX4468). Excellent Power-Supply Rejection Ratio: 112dB. Excellent Common-Mode Rejection Ratio: 126dB. High AVOL: 125dB (RL = 100k??).
Support MP3 format, playing power on automatically. When mp3 is played the red LED flashes. Support U disk (test 32G), TF Card (test 16G) play mode;?power on default. Buttons can be adjusted up and down to control songs, volume up and down, pause or play, mode switching. Press menu button enter the single / all song play mode.
Module chip using PCF8951 Module supports external voltage input of the 4-way acquisition (voltage input range of 0-5v) The module integrated photoresistor by AD collection precise value of the ambient light intensity Module integrated thermistor by the precise value of the ambient temperature of the AD acquisition Module integrated 1 channel 0-5V voltage input acquisition (the blue potentiometer to adjust…
