Commit 00d584c5 authored by Erik Strand's avatar Erik Strand

Rename final project idea

parent b7660f05
+++ +++
title = "Final Project Idea" title = "Mechanical LPF"
date = "2018-09-12" date = "2018-09-12"
menu = "main" menu = "main"
weight = 2 weight = 2
...@@ -9,9 +9,9 @@ weight = 2 ...@@ -9,9 +9,9 @@ weight = 2
Every electronic circuit has an analogous mechanical circuit whose motion is governed by an equivalent differential equation. Analog synthesizers are electronic circuits, so analog synthesizers have mechanical analogues -- analog analogue synthesizers. Every electronic circuit has an analogous mechanical circuit whose motion is governed by an equivalent differential equation. Analog synthesizers are electronic circuits, so analog synthesizers have mechanical analogues -- analog analogue synthesizers.
The heart and soul of any classic subtractive synth is its filter section. Most use a ladder circuit of RC filters. This takes a raw waveform with a lot of harsh high frequency content (like a sawtooth or triangle wave), and turns it into something more musical. The heart and soul of any classic subtractive synth is its filter section. Most use a ladder of RC circuits to make a low-pass filter (LPF). It takes a raw waveform with a lot of harsh high frequency content (like a sawtooth or triangle wave), and turns it into something more musical.
![](/img/rc_ladder.jpg#c) ![](/img/01_rc_ladder.jpg#c)
Two rungs (pictured) give a two pole filter, and four, well, four. I'd like to make a mechanical analog of one such rung. If things go well, I can make multiple and chain them together, just like in the electronic circuit. Two rungs (pictured) give a two pole filter, and four, well, four. I'd like to make a mechanical analog of one such rung. If things go well, I can make multiple and chain them together, just like in the electronic circuit.
...@@ -53,7 +53,7 @@ Finally, instead of measuring the output voltage across the capacitor, we'll be ...@@ -53,7 +53,7 @@ Finally, instead of measuring the output voltage across the capacitor, we'll be
All in all, here's a simple sketch of the main components for one stage of the filter. If all goes well I'll build multiple of these. All in all, here's a simple sketch of the main components for one stage of the filter. If all goes well I'll build multiple of these.
![](/img/mechanical_design.jpg#c) ![](/img/01_mechanical_design.jpg#c)
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