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Top edge — all connectors (cables exit upward; pedalboard-friendly)
↕ 1.8 in (45 mm)
Trig In
Inst In
Out TRS
USB-C
Trig in · 1/4″ inst pass‑through (click injected) · shared 1/4″ balanced‑TRS out · USB‑C power
↕ 5.5 in (140 mm)
PM‑1 Teacher
PWR
2.0″ 320×240 IPS TFT (ST7789) — tempo, name & all lane patterns
Play / Stop
Prev
TEMPO
Tap
Next
↔ 4.7 in (120 mm) wide

Load a configuration onto the device

Same firmware as the initial unit — only the panel hardware differs. Paste a patch (e.g. v1;t120;kick:4;snare:4=.X.X;hatClosed:4/2), a set‑list code, or a #p=…/#sl=… link.

or pick a built-in or saved set list:

PM‑1 — Teacher

HardwareStudio / lesson console~$59 one‑off

The full‑feature desktop console: a colour readout of every lane, fast set‑list navigation, and your instrument running straight through with the click mixed in — the hands‑on unit for a studio desk or a teaching room, on a non‑reflective matte‑black case. (For hands‑free live use, see the foot‑operated Stage stompbox.)

Top‑mounted 1/4″ jacks keep cabling tidy; the metronome click is summed into the signal in the analog domain (no re‑digitising, no added latency) and sent to a balanced 1/4″ TRS output for the desk or interface, plus a small monitor speaker. Powered over USB‑C — a wall adapter or a power bank. The colour TFT shows tempo, the item name and all lane patterns; arcade buttons + a recessed thumb‑roller make it quick to drive while you teach or track.

Spec & bill of materials

Rough parts list — a desk/studio RP2040 build (USB‑C powered) with analog click injection. Ballpark one‑off prices (USD); cheaper at volume.

PartQty~$
Brain & display
RP2040 board, USB‑C — e.g. Waveshare RP2040‑Zero / Pico‑clone14
2.0″ 320×240 IPS TFT, ST7789 — SPI18
Controls
Arcade pushbutton, 24 mm — Prev · Next · Tap34
Arcade pushbutton, 30 mm — Play12
Detented encoder (EC11 / PEC12) + side‑mount thumb‑roller — recessed; nothing to snap off12
Audio — analog click injection
PCM5102A I²S DAC — line‑level click13
Dual op‑amp, NE5532 / OPA2134 — hi‑Z instrument buffer + summing mixer11
Balanced line driver, DRV134 — (or cross‑coupled op‑amp) → 1/4″ TRS out14
PAM8302A mono Class‑D + 8 Ω 2 W speaker — monitor14
Connectors & power
1/4″ jack — Inst In (TS) · Out (TRS) · Trig In (TS)33
USB‑C bus power (5 V) + PWR LED — wall adapter or power bank; same port carries config; no battery11
Build
Custom PCB (or perfboard)15
Passives, headers, wire — R/C for the analog stage + decoupling—3
Die‑cast aluminium enclosure (Hammond 1590‑style) — bead‑blasted, matte‑black Type II anodise, laser‑etched legends112
Total (one‑off)≈ $56

Audio is summed in the analog domain: the DAC's click is mixed with a high‑impedance 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 re‑digitised (no added latency).

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