damras

CDAK did you have problems with feedback oscillations between the mic and earphones. If so how did you solve them. Could you post a diagram of your circuit if possibe. Thanks dude

Hey guys I have made this circuit but I am using a scope so I do not have a U5 stage yet. I get good audio signals when I look at the output using the elec mic when I speak into it. However when I place it on my skin I cannot pick up the heart beats. What do u think is the cause of this? I have not used a stethoscope cap or bottle cap, could this be the reason? Many thks