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