> I have configured my op-amp LM324 as a  voltage follower by typing the
> -ve input to the output of 1 op-amp gate. When I tie the +ve input to
> ground, the output is 0v. But when I tie the +ve input to Vcc(same as
> the +5v supply to the LM324), the output is just 3.8v. Is there
> something I missed out?

Apparently.  The LM324 is not a rail to rail output opamp.  The specs
don't exactly say outright how close Vout can get to V+, but with 30V V+,
Vout is only guaranteed to be >= 27V with a 10Kohm load.


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