[sdiy] Funky flip-flops

[harrybissell]

Scott Gravenhorst wrote:  <snipp'd>

> Regarding your oscilloscope angst blowing the supply fuse, I
> would check the probe's resistance to ground to make sure you
> don't have a short or shunt in the probe or input.  Or like
> Harry said, maybe it's a 50 ohm input?  This sounds
> outlandish to me, scope inputs are usually rather high input
> impedance.  IMHO, a 50 ohm input should be clearly marked as
> such.
>

We have a couple of HP digital scopes at work that have switchable
50ohm / 1M inputs.    They are selectable from a 'soft' menu... I think
there
is some indicator light, but if you are not REAL careful its possible to
really
fvck up your measurements and waste your time (big time)

Right - most scopes are 1M impedance

H^) harry