C
[email protected]
- Jan 1, 1970
- 0
As a young teenager unable to afford fancy test equipment like a scope,
I came to rely on a $17 logic probe from Radio Shack. It's internal
pulse detection circuit was inadequate in that it could not
differentiate one edge from the other or from certain types of noise,
but I soon learned to wrap the lead of a diode around the probe point,
and probe with the other diode lead instead. This was of great use in
checking the output of things like memory strobes, address decoders,
etc.
Fast forward nearly 20 years and as an engineering professional I sit
surrounded by storage scopes with horrid user interfaces, ultra high
speed but unfortunately broken scope probes, etc... and wish I had that
now discontinued $17 gadget from the shack.
I see some logic probes in other test equipment catalogs. What's good?
- I want to detect steady high and low states, preferably audibly
- I want to detect edges, audibly
- preferably there would be no mode switching, or mode switching with
tactile state feedback
- needs to support 3.3v logic
I came to rely on a $17 logic probe from Radio Shack. It's internal
pulse detection circuit was inadequate in that it could not
differentiate one edge from the other or from certain types of noise,
but I soon learned to wrap the lead of a diode around the probe point,
and probe with the other diode lead instead. This was of great use in
checking the output of things like memory strobes, address decoders,
etc.
Fast forward nearly 20 years and as an engineering professional I sit
surrounded by storage scopes with horrid user interfaces, ultra high
speed but unfortunately broken scope probes, etc... and wish I had that
now discontinued $17 gadget from the shack.
I see some logic probes in other test equipment catalogs. What's good?
- I want to detect steady high and low states, preferably audibly
- I want to detect edges, audibly
- preferably there would be no mode switching, or mode switching with
tactile state feedback
- needs to support 3.3v logic