The output will repeatedly change from high to low at a set frequency.

To calculate the values, select C1 first, depending on the frequency you want, by following this guide:

1Hz to 100Hz = 470nF,

100Hz to 10KHz = 4.7nF,

10KHz to 1MHz= 100pF

Then rearrange the formula to find R1 as follows

R1 = 1 / (2.2 x Frequency x C1)

Finally make RB = 10 x R1

To ensure that the caluclations are correct, use either **Mohms & uF** or **Ohms & Farads** as units