873 B
873 B
Resistor Values and Combinations
...with reducing resistor count as a priority.
This time not while half-asleep.
90Hz-110Hz
low-pass
(120 \parallel 47) + 3.3 = 37.072 \Omega
high-pass
(68 \parallel 47) + (470 \parallel 2.2) = 28.245 \Omega
290Hz-310Hz
low-pass
22 + 22 + 10 + 1 = 55 \Omega
high-pass
47 \Omega resistors are already available.
950Hz-1050Hz
low-pass
((68 \parallel 68) \parallel (68 \parallel 68)) = 17 \Omega
high-pass
(10 \parallel 10) + 10 = 15 \Omega
3.2kHz - 3.4kHz
low-pass
47 + 1 + 1 = 49 \Omega
high-pass
22 + 22 + 1 + 1 = 46 \Omega
9khz - 11khz
low-pass
(10 \parallel 10) + (47 \parallel 3.3) + 10 = 18.083 \Omega
high-pass
(22 \parallel 22) + 1 + 1 + 1 = 14 \Omega (better tolerance)
Alternative: 10 + 1 + 1 + 1 + 1 = 14 \Omega (worse tolerance)