i need an amplifier to amplify my electrolyte microphone sound and put output to sim800l . currently i just experiment with amplifiers to find good gain for sim800l mic input.
some one advise me to use common emitter as pre amplifier . so i found this circuit on the internet and check the simulation in Proteus 8 software.
in theory this circuit work great .i add electrolyte microphone to input of circuit in reality. i just can hear very weak audio in output but without amplifier and just connecting electrolyte microphone to sim800l sound is much better.
edited: i want to know why i cant amplify my voice in real circuit . i check all wire connection and its not wire problem