The HP LogicDart
A logic test device somewhere between a logic probe and a logic analyzer, this is a piece of test equipment that crosses HP's calculator expertise with their test equipment capabilities. Introduced in 1998, it came a little after its time and didn't really meet its market.
However, if you are troubleshooting digital logic, it is a useful handheld tool.
It has five functions
- DC Voltmeter: low voltages only, nothing special
- Frequency meter
- Resistance, continuity and diode test
- Logic probe. Bright red lights.
- 3-channel logic analyzer
These are all useful functions for poking around a board. The first four are basic test. This can mostly be done with a scope, but the handheld form factor is more convenient.
The Agilent page with manual and datasheet.
Evaluation engineering on the LogicDart test program and user feedback.