49 lines
866 B
Markdown
49 lines
866 B
Markdown
# 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)
|
|
|