The store recently introduced a microphone/microphone/pickup amplifier module, which can realize the audio signal amplification of the capacitive microphone (column microphone pickup). The output of the board can be directly connected to the audio input of the audio, or the audio input of the computer to realize the voice.
Chat or voice amplification, the board comes with a high-quality op amp core, the amplification gain can be adjusted, the noise floor is small, the sound is clear and bright!
This board can directly push the earphones of ordinary mobile phones and can be used as hearing aids.
The board should be powered by battery (two or more dry batteries or lithium battery 18650), followed by linear power supply. If switching power supply is required, please add filter circuit to ensure that the circuit power supply ripple is small and the ripple is louder.
It will be bigger.
Board parameters:
1. Power: DC 2.6-12.5V
2. Input: the board is equipped with a capacitive microphone (sensitivity 58D)
3. Output: The board has audio output ports L and G (G is audio ground)
4. New board size (without microphone): length 34mm width 14.2mm