under THEORY OF OPERATION, formula for f given as:

f = 0.7 / RC

which is not correct.

The correct approximation formula is:

f = 1 / 0.7(RC)

which can also be expressed more simply; if harder to remember:

f = 1.44 / (RC)

I also suggest that the approximate formula for t (time) be added just prior to the calculation for frequency; as:

t = 0.7(RC)

...mentioning that R is in Ohms, and C is in Farads.

f = 0.7 / RC

which is not correct.

The correct approximation formula is:

f = 1 / 0.7(RC)

which can also be expressed more simply; if harder to remember:

f = 1.44 / (RC)

I also suggest that the approximate formula for t (time) be added just prior to the calculation for frequency; as:

t = 0.7(RC)

...mentioning that R is in Ohms, and C is in Farads.

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