I want make a sound switch,so I use 741 op amp,but the problem is,my op amp’s out put when there is no in put equal to my Vcc!!
what I know about op amp is output equal to difference of inputs!!Am I wrong??I know about offset voltage but I don’t think offset voltage equal to Vcc!!
(my Vcc is 9volt and I use two different op amp for test but their respond is same!!)