13+ Microphone Amplifier Circuit Using Lm358. The one that i used in this project i took from an old house phone that mysteriously. The first stage of each consists of arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special.
Egyszerű Mic Pre-Amp alapú LM358 | Egyszerű from i.pinimg.com
The lm358 isn't configured as an amplifier and your speaker only has one wire. Also the black wire of the electret microphone is connected to vcc. It should be like very small sound.
Two operational amplifiers are compensated internally.
13+ Microphone Amplifier Circuit Using Lm358. The pre amplifier amplifies signal with very high gain but does not have the drive current or current gain to drive the output. In the measurement industry, a very crucial functional block is a programmable gain. It should be like very small sound. The resistor that powers the microphone must not be connected directly to the positive power supply because the supply might have some hum on it.
