Circuit Project Electronic

Description:
A simple mixer with 3 line inputs and 3 mic inputs using commonly available parts.
Notes:
The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. [...]

Source : http://users.otenet.gr/~athsam/audio_mixer_pc.htm

Most cards of sound in computer, are deprived stereo input for microphone, on the contrary have stereo input for high level [ Line ]. The circuit uses the input Line of card of sound, in order to we place a two mono stereo microphone, in the input of card of sound. Simultaneously he [...]

Circuit Pre MIC (microphone preamplifier) 2 CH by IC NE5532 or LF353
PCB Pre MIC (microphone preamplifier) 2 CH by IC NE5532 or LF353