metronome/info-teacher.html
Me Here be00ebf097 Restructure (1/2): Concepts = landing with live embeds; shared chrome partials; Showcase redesign
- Concepts is now the landing (/): index.html is the form-factor gallery with the
  LIVE widget embedded in every box (editor/teacher/stage/micro/showcase/initial),
  on the shared header/footer. concepts.html retired; every "Concepts" link → /.
- New shared chrome partials src/header.html, src/footer.html, src/chrome.js
  (assembled by build.sh) + .site-foot / details.spec styles in base.css. Applied
  to the landing + showcase this pass.
- Showcase redesign per spec: the pendulum bar IS the display — each lane's
  subdivisions/accents ride along the rod as moving RGB light (all meters combined);
  transparent outside the body (no black window); a printed tempo scale on the
  vertical axis with a draggable weight to set tempo; start is an external button
  (the real unit starts when lifted from its holder).

Next pass: roll the shared header/footer onto the remaining pages (incl. the editor
header-above-toolbar), merge Open=Info into one page per form factor with the
expandable Info & BOM, and add teacher-style dimensioned views to Stage/Micro/Showcase.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-28 09:09:51 -05:00

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<title>PM1 Teacher — info &amp; BOM — VARASYS</title>
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<span class="page-name"><b>PM1</b> · Teacher — info</span>
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<a href="/editor.html">Editor</a>
<a href="/">Concepts</a>
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<h1>PM1 — Teacher</h1>
<div class="tags"><span class="tag hw">Hardware</span><span class="tag">Studio / lesson console</span><span class="tag">~$59 oneoff</span></div>
<p class="lead">The fullfeature desktop console: a colour readout of every lane, fast setlist navigation, and
your instrument running straight through with the click mixed in — the handson unit for a studio desk or a
teaching room, on a nonreflective matteblack case. (For handsfree live use, see the footoperated
<a href="/stage.html">Stage</a> stompbox.)</p>
<div class="embed-wrap">
<div data-varasys-metronome="teacher"
data-patch="v1;t120;b16;kick:4=X.x.;snare:4=.X.X;hatClosed:4/4" data-height="520"></div>
</div>
<p class="cap">Live widget (embedded). <a href="/teacher.html">Open the full Teacher page ↗</a> · <a href="/embed.html">embed this</a></p>
<h2>Designed for</h2>
<p>The studio desk and the teaching room. Topmounted 1/4″ jacks keep cabling tidy; you plug your
instrument in, the metronome click is summed into the signal in the <b>analog domain</b> (no redigitising,
no added latency) and sent to a balanced 1/4″ TRS output for the desk or interface, plus a small monitor
speaker. Powered over USBC — a wall adapter, or a power bank. The colour TFT shows tempo, the item name,
and all lane patterns; arcade buttons + a recessed thumbroller make it quick to drive while you teach or track.</p>
<h2>Bill of materials</h2>
<p class="sub">Rough parts list — a desk/studio RP2040 build (USBC powered) with analog click injection.
Ballpark oneoff prices (USD); cheaper at volume.</p>
<table class="bom">
<thead><tr><th>Part</th><th class="q">Qty</th><th class="c">~$</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 / Picoclone</span></td><td class="q">1</td><td class="c">4</td></tr>
<tr><td class="part">2.0″ 320×240 IPS TFT, ST7789 <span class="spec">— SPI</span></td><td class="q">1</td><td class="c">8</td></tr>
<tr class="grp"><td colspan="3">Controls</td></tr>
<tr><td class="part">Arcade pushbutton, 24 mm <span class="spec">— Prev · Next · Tap</span></td><td class="q">3</td><td class="c">4</td></tr>
<tr><td class="part">Arcade pushbutton, 30 mm <span class="spec">— Play</span></td><td class="q">1</td><td class="c">2</td></tr>
<tr><td class="part">Detented encoder (EC11 / PEC12) + sidemount thumbroller <span class="spec">— recessed; nothing to snap off</span></td><td class="q">1</td><td class="c">2</td></tr>
<tr class="grp"><td colspan="3">Audio — analog click injection</td></tr>
<tr><td class="part">PCM5102A I²S DAC <span class="spec">— linelevel click</span></td><td class="q">1</td><td class="c">3</td></tr>
<tr><td class="part">Dual opamp, NE5532 / OPA2134 <span class="spec">— hiZ instrument buffer + summing mixer</span></td><td class="q">1</td><td class="c">1</td></tr>
<tr><td class="part">Balanced line driver, DRV134 <span class="spec">— (or crosscoupled opamp) → 1/4″ TRS out</span></td><td class="q">1</td><td class="c">4</td></tr>
<tr><td class="part">PAM8302A mono ClassD + 8 Ω 2 W speaker <span class="spec">— monitor</span></td><td class="q">1</td><td class="c">4</td></tr>
<tr class="grp"><td colspan="3">Connectors &amp; power</td></tr>
<tr><td class="part">1/4″ jack <span class="spec">— Inst In (TS) · Out (TRS) · Trig In (TS)</span></td><td class="q">3</td><td class="c">3</td></tr>
<tr><td class="part">USBC bus power (5 V) + PWR LED <span class="spec">— wall adapter or power bank; same port carries config; no battery</span></td><td class="q">1</td><td class="c">1</td></tr>
<tr class="grp"><td colspan="3">Build</td></tr>
<tr><td class="part">Custom PCB (or perfboard)</td><td class="q">1</td><td class="c">5</td></tr>
<tr><td class="part">Passives, headers, wire <span class="spec">— R/C for the analog stage + decoupling</span></td><td class="q"></td><td class="c">3</td></tr>
<tr><td class="part">Diecast aluminium enclosure (Hammond 1590style) <span class="spec">— beadblasted, matteblack Type II anodise, laseretched legends</span></td><td class="q">1</td><td class="c">12</td></tr>
<tr class="total"><td>Total (oneoff)</td><td class="q"></td><td class="c">≈ $56</td></tr>
</tbody>
</table>
<p class="sub" style="margin-top:12px">Audio is summed in the <b>analog domain</b>: the DAC's click is mixed with a highimpedance
buffer of the 1/4″ instrument input, then fed to the balanced line driver (1/4″ TRS out) and the monitor amp —
so your instrument is never redigitised (no added latency).</p>
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