Hey guys. I'm brand new to this forum. I'm starting to begin working with electronics as a hobby, and I'm attempting to tinker with op amps. I have an LM324 I got from RadioShack.
The question I'm having is, as I think I understand, the op amp amplifies the difference in voltage between the inverting and non-inverting inputs. Right? So I've got, say +5v on the Vcc+ pin and 0v on the Vcc- pin. My problem is this: the output pin is outputting +5v. but since there is nothing going into the inverting nor the non-inverting input, shouldn't the output be 0v?
Could this be because I'm supplying the op amp with 5v+ and 0v, instead of 5v+ and 5v-? Ideally, I'm trying to connect an iPod audio out to a 3.5mm jack. then connect this to the non-inverting input of the op amp. Then provide negative feedback to the inverting input, which is connected to ground.
When I do this, though, my output is always high (5v) with their is power travelling to either input or not.
I guess I'm just lost, and as much as I've researched it, I still can't figure out how to get one to function. Is there anyone that could explain this to me?
The question I'm having is, as I think I understand, the op amp amplifies the difference in voltage between the inverting and non-inverting inputs. Right? So I've got, say +5v on the Vcc+ pin and 0v on the Vcc- pin. My problem is this: the output pin is outputting +5v. but since there is nothing going into the inverting nor the non-inverting input, shouldn't the output be 0v?
Could this be because I'm supplying the op amp with 5v+ and 0v, instead of 5v+ and 5v-? Ideally, I'm trying to connect an iPod audio out to a 3.5mm jack. then connect this to the non-inverting input of the op amp. Then provide negative feedback to the inverting input, which is connected to ground.
When I do this, though, my output is always high (5v) with their is power travelling to either input or not.
I guess I'm just lost, and as much as I've researched it, I still can't figure out how to get one to function. Is there anyone that could explain this to me?