>I've been searching the web for a free/low cost "'timing diagram' + editor"
>that can help me make timing diagrams for some simple MSI logic ccts.
>(counters, shift registers, basic logic, etc.) So far I haven't
>been able to find anything suitable. Everything that turns up is
>for VHDL of LSI ICs with requires building the MSI logic
>chips from scratch. (74HC166, '161, '595, '08, etc).
>
>Surely there is something out there that is simpler that VHDL yet
>more efficient than using graph paper and a ruler? Or am I not
>using the right search terms?
>
>Thanks in advance for any recommendations.



I have used Excel to do this. Use a column to represent a time interval
value, and then each additional column for a single waveform with the cell
value representing the voltage level at that time step. This allows you to
put a rise time on the graph instead of having absolutely truly vertical
switching states on square waves. Then go into the graphing function to see
the resulting waveforms.

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