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Me Here 367951c903 PM_K-1 hardware: SIG/CLIP indicator + monitor speaker amp (both DNP) 
indicator.py: peak-detect (Schottky+RC) on STAGE1_OUT (signal-present) and MIX_OUT (clip)
-> LM393 (powered from +15V) vs tunable threshold dividers -> open-collector outputs pulled
to +3V3 = SIG_LED/CLIP_LED (drive face LEDs + read on GPIO19/20).
speaker.py: PAM8302A filterless class-D (pinout verified, Diodes SO-8) fed from MIX_OUT
(single-ended, RIN=68k -> ~+5.7dB), SD pulled high, BTL out -> SPK_P/SPK_N.
Both ERC 0 errors; netlists 0 errors. Threshold/gain values tunable; DNP per form factor.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-05-30 23:49:18 -05:00
..
audio_chain.py PM_K-1 hardware: integrate audio chain into one netlist (dedup shared parts) 2026-05-30 20:41:39 -05:00
indicator.py PM_K-1 hardware: SIG/CLIP indicator + monitor speaker amp (both DNP) 2026-05-30 23:49:18 -05:00
interconnect.py PM_K-1 hardware: interconnects (digital ribbon + analog + MIDI headers + USB-C/ESD) 2026-05-30 23:33:21 -05:00
mcu_core.py PM_K-1 hardware: RP2350 core (MCU + flash + crystal + USB + boot/reset + SWD) 2026-05-30 21:56:12 -05:00
midi.py PM_K-1 hardware: MIDI block (DNP) -- opto IN + buffered OUT/THRU 2026-05-30 23:28:59 -05:00
power_tree.py PM_K-1 hardware: power tree (USB 5V -> +/-18V switcher -> clean +/-15V LDOs + 3V3) 2026-05-30 20:53:44 -05:00
rtc.py Firmware push fix on both Kit (0.0.24) + Explorer (0.0.4) 2026-05-30 22:51:46 -05:00
speaker.py PM_K-1 hardware: SIG/CLIP indicator + monitor speaker amp (both DNP) 2026-05-30 23:49:18 -05:00
stage1_input.py PM_K-1 hardware: verify THAT1240 against datasheet; fix pinout + part numbers 2026-05-30 19:48:41 -05:00
stage1b_select.py PM_K-1 hardware: resolve TQ2SA relay pinout; Stage 2 DAC + reconstruction filter 2026-05-30 20:06:26 -05:00
stage2_dac.py PM_K-1 hardware: resolve TQ2SA relay pinout; Stage 2 DAC + reconstruction filter 2026-05-30 20:06:26 -05:00
stage3_sum.py PM_K-1 hardware: Stage 3 -- summing node (selected input + click) 2026-05-30 20:15:17 -05:00
stage4_driver.py PM_K-1 hardware: Stage 4 -- balanced output driver (completes the audio chain) 2026-05-30 20:27:04 -05:00