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When I learned electronics in the 1950s, we didn't have spread sheets and such. We used charts called nomographs - they worked like slide rules, which were... oh never mind...
There would be three line scales on a page, running parallel: resistance, freq, capacitance. Pick the resistance on one scale and the capacitance on the other and draw a line between them. Where the line crossed the freq scale was the freq. In fact, any two of the pieces of information would yield the third.
We also had charts for LC, and many other things. For approximations it was a lot faster that doing the calculations, since we didn't have calculators either.
I have a little slide rule thing that calculates voltage/current/power into a resistance, and it works the same way.
A spread sheet would have been nice though.
There would be three line scales on a page, running parallel: resistance, freq, capacitance. Pick the resistance on one scale and the capacitance on the other and draw a line between them. Where the line crossed the freq scale was the freq. In fact, any two of the pieces of information would yield the third.
We also had charts for LC, and many other things. For approximations it was a lot faster that doing the calculations, since we didn't have calculators either.
I have a little slide rule thing that calculates voltage/current/power into a resistance, and it works the same way.
A spread sheet would have been nice though.
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