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Counting Logic Probe

A compact diagnosic tool between DVM and scope

Counting Logic Probe
 
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Description

A long time ago I saw a small logic probe, with TTL/CMOS level indication (Red/Yellow/Green) and a four LEDs counter for the frequency of the signal. Somewhat later I created two separate tools, one TTL-level indicator and the pulse counter described here. Recently I made a board for it. But having this, there are plans to expand it somewhat:

- selectable up/down/both flank count,

- more LEDs and/or spread them over a wider range in triplets,

- make it more compact with SMD parts,

- integrate the TTL/CMOS level indicator.

 

The levelLogicProbe is here: https://electrickery.nl/digaud/tools/levelLogicProbe/

 

This project was reposted with the permission of the author. If you are interested in this project and want to know more, Please check the original article: ROM-emulator | Hackaday.io

And if you want to explore more projects, please follow the author: fjkraan (Hackaday). He has many wonderful projects and is an excellent maker. Enjoy it! :)

 

Schematic and Layout

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Counting Logic Probe

A compact diagnosic tool between DVM and scope

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