Hello and thank you in advance for your help.
I'm trying to make desktop USB microphone using a dynamic cardioid type mic and a small sound card. (The mics resistance is 650Ω)
I know that dynamic mics need a pre-amplifier and here comes my problem.
I took apart an old Sony Sound system and i found a small mic pre-amp module. This module uses a 5218A op-amp that requires a dual power supply but the problem is that i want to use the 5V that the USB provides thus eliminating the need for an external power source. After some searching I found that the LM358 does not require a dual power supply and works at 5V. I tried switching the two op-amps but I got nothing... The mic only picks up sound when i softly blow on it and even that its heavily distorted.
So I ask... Is there a way I can make this work? And if not, can somebody please post a circuit that will help me?
NOTE: I don't have the schematic of the board :/ I hope the pictures will help..
This is the microphone I'm using
I'm trying to make desktop USB microphone using a dynamic cardioid type mic and a small sound card. (The mics resistance is 650Ω)
I know that dynamic mics need a pre-amplifier and here comes my problem.
I took apart an old Sony Sound system and i found a small mic pre-amp module. This module uses a 5218A op-amp that requires a dual power supply but the problem is that i want to use the 5V that the USB provides thus eliminating the need for an external power source. After some searching I found that the LM358 does not require a dual power supply and works at 5V. I tried switching the two op-amps but I got nothing... The mic only picks up sound when i softly blow on it and even that its heavily distorted.
So I ask... Is there a way I can make this work? And if not, can somebody please post a circuit that will help me?
NOTE: I don't have the schematic of the board :/ I hope the pictures will help..
This is the microphone I'm using