Multidirectional microphone amplifier

Multidirectional microphone amplifier
This Multidirectional microphone amplifier circuit is often used in a panel discussion or a meeting room to capture the audio from all the partners without the need to give each microphone. Placing this in the middle of the table captures audio from each through which is formed by four electret capsules with a level control for each individual reception. (more…)

Simple Microphone Pre-amp

Simple Microphone Pre-amp
This Simple preamplifier circuit provides sufficient gain to weak audio signals from the microphone. This circuit can also be supplied from the voltage baterry 3 to 9 volts if necessary. Take a note that the microphone used in this pre-amp circuit is electret type. (more…)

Microphone Amplifier based K548UN1

Microphone Amplifier based K548UN1
The operating principle is as follows: Resistors R1, R3 is used to adjust the gain, which equals 25. To increase the gain by 75 to build a resistance of 68 ohms. It is not recommended to install too high gain, because it may affect the sound quality, although this depends on the microphone. Capacitors C5 and C6 are used for suppression of feeding. (more…)