[sdiy] protecting line level inputs

[Harry Bissell Jr]

--- Cynthia Webster <cynthia.webster at gte.net> wrote:


> I was getting hot spikes from a circuit but wanted
> to limit the output
> from +15V down to a solid + 5 Volt Gate output, I
> didn't have the right
> zener, so I put a 5 volt Voltage Regulator before
> the output jack and it
> worked perfectly, (and added all sorts of short
> circuit protection in
> the process...)  This would not work for an audio
> signal though :)

Could work... but the response and stability would not
be guaranteed without the recommended capacitors. This
might make the circuit slow.

Better might be to make a 5V signal with the regulator
and use a transistor level shifter...

Or the zener... which is the most minimal approach.

Still... if it works for you, it works for you. I'd
call this an Apollo 13 solution  :^P  (as long as it
gets you home... its beautiful !!!)

H^) harry