# Resistor Values and Combinations

The schematic calls for resistor values that are not available to us without some light sorcery. This is an attempt.

Every resistor from the pack is rated for 0.25W and has a tolerance of $\pm5%$. Want to figure out how that could affect my calculations? Me neither.

## 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
$(220 \parallel 68) + 2.2 + 1 = 55.144 \Omega$

### high-pass
Luckily, we already have 47 $\Omega$ resistors.

## 950Hz-1050Hz

### low-pass
$(22 \parallel 47) + 2.2 = 17.186 \Omega$
...or alternatively:
$(10 \parallel 10) + 10 + 1 + 1 = 17 \Omega$

### high-pass
$(10 \parallel 10) + 10 = 15 \Omega$

## 3.2kHz - 3.4kHz

## low-pass
$47 + 1 + 1 = 49 \Omega$

## high-pass
$22 + 22 + 1 + 1 = 46 \Omega$

...no one ever said we had to be clever.

## 9khz - 11khz

## low-pass
$(10 \parallel 10) + (68 \parallel 3.3) + 10 = 18.147 \Omega$

## high-pass
$(22 \parallel 22) + 1 + 1 + 1 = 14 \Omega$

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# Bonus: some fun(?) and useful(?) resistor values

$(10 \parallel 10) = 5 \Omega$

$(220 \parallel 22) = 20 \Omega$

$(22 \parallel 22) = 11 \Omega$

$(100 \parallel 150) = 60 \Omega$