1 sec = 1000µF
In this case the frequency is 98,7 Hz the period cycle is 1/98,7 = 1,013171*10^-2
(1,013171*10^-2)/1000 = 1,013171*10^-5
10,13171*10^-6 = 10,13 µs ~ 10µF
If you want better accuracy:
1) change the Left 1kΩ resistor to 1MΩ
2) change the 220Ω resistor to 220kΩ
DO NOT USE ELECTROLYTIC CAPACITORS!
