Re: Intermittent Problem with Circuit Design. Asking for Assistance.

Thanks for all the help on this.

The -24V does not stay as a reference. The input fluctuates at some
point when an external device is triggered.

What I currently have right now is:
-24VDC D1 /
____|\|____
|/| |
/ |
/
\R
/1
\
| C1
+--||-- GND
|
\E
Q1|B-----Gnd
/C
|
+-------------------U1
|
/
\R
/2
\
|
|
|
--- +5VDC
<
D1 - 1N4746A
R1 - 5KOhm
R2 - 10KOhm
Q1 - 2N2222
U1 - 7414
C1 - 330pF

It seems to work, but would it be more stable/more correct with a 10K
resistor instead of C1?

.

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