Ideal for troubleshooting digital projects or checking for highs and lows, a logic proble will let you know what's going on with that mystery signal. And making your own is easy with this neat kit.
As described in the August 2004 issue of Silicon Chip magazine, this probe indicates 3 conditions when testing circuits & devices. It is incredibly easy to build, and also makes a great school project!
This very simple project is designed to be an invaluable tool in diagnostic & troubleshooting. It has three LEDs which are readily visible, located near the top of the probe. The green one indicates a low level, the red one a high level and the yellow one is lit whenever the level changes from high to low.
The kit includes all parts and instructions, so you just need a soldering iron and basic tools. We like it so much, we use it ourselves: