Re: Opamp problem

I took a snap shot of my circuit and also posted on
http://www3.sympatico.ca/lerameur/
I used the LM324 becasue I had it, and using the LM393 or LM339 did not
work using simple testing . From what I read these chips should be
doing the same work. Any chips you recommend ??

ken


Eeyore a écrit :

lerameur wrote:

hello,

I made a logic probe circuit using Pspice. The theory works, but i
implemented it, the circuit gives me weird values. I am not familiar
ith working with these chips.
I have put a schematic of the circuit here:
http://www3.sympatico.ca/lerameur/
and an explanation below showing where the bug is.

That's a very high source resistance to be biasing an LM324 from !

Why are you even using such an ancient and rather poor op-amp even ?

I also can't fathom what the circuit's meant to do. There's no feedback round
the op-amps. Do you actually want comparators ?

Graham

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