When I put PA Microphone into computer MIC IN, I don't get any sound from it. Actually I want to record my voice in PC through a PA microphone. Can you tell me what is the reason behind it and how I can solve it ? Please help me !
Thank you for your reply !Hi learning,
first off, what is a "PA" microphone?
Microphones are normally capacitive (Electret) or inductive (dynamic).
Most today's main boards with integrated AF-amplifier don't have a mic preamplifier. Using the windows voice recorder you get a very weak signal only when shouting into the microphone.
Here are schematic and PCB layout for a PC-Mic-Amplifier.
T1 must be a BC550C (hfe > 600)
AF-OUT connects to the outer pin of the 3.5mm stereo plug and Ground connects to the sleeve.
PA Microphone has a 3-pin XLR connector with 1/4" TRS jack. Tell me how you can connect it !It is not risky to attach a coupling capacitor since the MIC IN connector on a computer has a DC voltage of about only 5V at a very low current. Use a 2.2uF capacitor with its negative wire connected to the mic and its positive wirre connected to the audio input terminal.
Yes, you will have a huge problem.My connection to PC by PA microphone as PA Microphone -> PA Amplifier (MIC socket) -> PA Amplifier ( Speaker terminal) -> PC (MIC IN or LINE IN) Please tell me whether this combination will work without any problem !
If I add a coupling capacitor in PA Amplifier ( Speaker terminal) then I hope that it will work ! What is your saying ?Yes, you will have a huge problem.
If the mic and the PA amplifier work probably then their voltage and current are much too high for the MIC IN or LINE IN on the computer and cause the computer to blow up!
If you connect your dynamic mic with a coupling capacitor to the MIC IN of the computer then it should work.
NO, DO NOT connect the speaker output from the amplifier to the PC sound card it will kill the sound card and maybe the PC.If I add a coupling capacitor in PA Amplifier ( Speaker terminal) then I hope that it will work ! What is your saying ?
you shouldnt need an external capacitor wire up a patch cable as per my previous post to go between the microphone and the sound card mic input.Do you have any assembly picture of attaching coupling capacitor to MIC IN of PC ?