gvi70000
Member level 5
Hello,
I have the mic preamp from the attached picture and i need to modified it so that i can use it as sensor for an Arduino.
The preamp works, but the output signal is centered at around 2.2V and i need that 2.2v to become 0(at analogRead from sensor pin - i only need the upper "positive" part of the wave to be taken in to consideration). Basically i need to bodify this preamp to be used as a sound level sensor 0(0V on Arduino input)- no sound
1023(5v on Arduino input ) very loud sound
Can anyone help me to modify this circuit?
PS: I would like to keep the gain on each stage of the amp if it is possible
I have the mic preamp from the attached picture and i need to modified it so that i can use it as sensor for an Arduino.
The preamp works, but the output signal is centered at around 2.2V and i need that 2.2v to become 0(at analogRead from sensor pin - i only need the upper "positive" part of the wave to be taken in to consideration). Basically i need to bodify this preamp to be used as a sound level sensor 0(0V on Arduino input)- no sound
1023(5v on Arduino input ) very loud sound
Can anyone help me to modify this circuit?
PS: I would like to keep the gain on each stage of the amp if it is possible