Problem with simulation

[narendra Utukuri]

Please take a look at the readings on the multimeters 2, 3 and 4; for some reason they all show -60V; Notice that we only have 30 V (-15v & +15 V) connected to the pots. If we disconnect the LM324 inputs from the pots, the voltmeters read OK. This is frustrating. Need some help.

thanks and regards,

Narendra Utukuri

DeVry, Houston, TX

[lacy]

Try hooking up U1A, U2B, and U3C to power. These are unconnected. When you placed these apparently you didn't place them as one continuous IC otherwise they would have been labeled U1A, U1B, U1C, U1D. Unless this is what you wanted to do.

You can either hook them up to power or try to re-place them to get them all in one IC. I am not sure about whether Version 8 supports virtual wiring to IC's the way Version 10 does, but with Version 10 if you have all these in one IC then you only have to hook up one of them to apply power to all of them.

This seemed to take care of the voltage problem.