metronome/info-micro.html
Me Here d78fb762e5 Per-version info pages; move Stage BOM out to info-stage; add Micro BOM
Each form factor now has an information page (purpose + live embedded widget),
with priced BOMs only on the buildable hardware (Stage ≈$59, Micro ≈$28):
- info-editor.html / info-initial.html — purpose only (web app / concept)
- info-stage.html — purpose + the priced BOM moved out of stage.html
- info-micro.html — purpose + a new ~$28 practice-unit BOM
stage.html drops the BOM panel (+ its .bom CSS) and gains a "Spec & BOM" link;
the shared .bom/.sub table CSS lives in src/base.css. "Info" added to every
page nav and to the concept cards. Wired into build.sh + deploy.sh.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-26 12:02:17 -05:00

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<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>PMµ Micro — info &amp; BOM — VARASYS</title>
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<header class="site-head">
<div class="head-left">
<a class="brand" href="/" title="VARASYS — Simplifying Complexity">
<img class="brand-logo brand-dark" src="data:image/png;base64,@BUILD:logo-dark@" alt="VARASYS — Simplifying Complexity" />
<img class="brand-logo brand-light" src="data:image/png;base64,@BUILD:logo-light@" alt="VARASYS — Simplifying Complexity" />
</a>
<span class="page-name"><b>PMµ</b> · Micro — info</span>
</div>
<nav class="site-nav">
<a href="/index.html">Editor</a>
<a href="/concepts.html">Concepts</a>
<a href="/micro.html">Open ↗</a>
<button id="themeBtn" class="tbtn" title="toggle light / dark theme"></button>
</nav>
</header>
<main>
<h1>PMµ — Micro</h1>
<div class="tags"><span class="tag hw">Hardware</span><span class="tag">Home practice</span><span class="tag">~$28 oneoff</span></div>
<p class="lead">The smallest possible polymeter unit for daily practice: one dial and a red LED, nothing to
learn. Spin for tempo, press to start/stop, hold &amp; spin to flip through grooves — that's it.</p>
<div class="embed-wrap">
<div data-varasys-metronome="micro"
data-patch="v1;t120;kick:4;snare:4=.X.X;hatClosed:4/2" data-height="300"></div>
</div>
<p class="cap">Live widget (embedded). <a href="/micro.html">Open the full Micro page ↗</a> · <a href="/embed.html">embed this</a></p>
<h2>Designed for</h2>
<p>The practice desk. No screen to read, no menus — a single depressable scrollencoder does everything
(spin = tempo, press = start/stop, hold + spin = switch track) and a bright 7segment LED shows the BPM
(or the track number while you switch). It runs off any USBC charger, plays through a small builtin
speaker, and ships with the editor's grooves built in. Synth voices only — no analog audio path.</p>
<h2>Bill of materials</h2>
<p class="sub">Rough parts list — a USBCpowered RP2040 practice unit. Ballpark oneoff prices (USD); cheaper at volume.</p>
<table class="bom">
<thead><tr><th>Part</th><th class="q">Qty</th><th class="c">~$</th></tr></thead>
<tbody>
<tr class="grp"><td colspan="3">Brain &amp; display</td></tr>
<tr><td class="part">RP2040 board, USBC <span class="spec">— e.g. Waveshare RP2040Zero</span></td><td class="q">1</td><td class="c">4</td></tr>
<tr><td class="part">3digit 7segment LED (red) + driver <span class="spec">— MAX7219 / shift register, or direct GPIO</span></td><td class="q">1</td><td class="c">3</td></tr>
<tr class="grp"><td colspan="3">Control</td></tr>
<tr><td class="part">Detented push encoder (EC11) + knob <span class="spec">— tempo / press / holdspin</span></td><td class="q">1</td><td class="c">2</td></tr>
<tr class="grp"><td colspan="3">Audio</td></tr>
<tr><td class="part">MAX98357A I²S amp + 8 Ω 2 W speaker <span class="spec">— synth click (no analog in)</span></td><td class="q">1</td><td class="c">4</td></tr>
<tr class="grp"><td colspan="3">Power &amp; build</td></tr>
<tr><td class="part">USBC bus power (on the board) + PWR LED</td><td class="q">1</td><td class="c">1</td></tr>
<tr><td class="part">Custom PCB (or perfboard)</td><td class="q">1</td><td class="c">4</td></tr>
<tr><td class="part">Passives, headers, wire</td><td class="q"></td><td class="c">2</td></tr>
<tr><td class="part">Small aluminium enclosure <span class="spec">— beadblasted, matteblack anodised</span></td><td class="q">1</td><td class="c">8</td></tr>
<tr class="total"><td>Total (oneoff)</td><td class="q"></td><td class="c">≈ $28</td></tr>
</tbody>
</table>
</main>
<div class="site-foot">VARASYS · Simplifying Complexity — <span id="appVersion">v0.0.1-dev</span></div>
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