# 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)