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Author	SHA1	Message	Date
Me Here	075c1786af	PM_K-1 hardware: verify THAT1240 against datasheet; fix pinout + part numbers Verified the receiver from THAT doc 600035 rev05 instead of guessing: - THAT1240 = 0 dB (unity) -- correct as specced; 1243=-3dB, 1246=-6dB would be wrong. - SO-8 pinout 1=Ref 2=In- 3=In+ 4=Vee 5=Sense 6=Vout 7=Vcc 8=NC. My initial SKiDL pins were mostly wrong; corrected. Netlist now matches the datasheet. - KiCad Device:D is pin1=K/pin2=A; my clamp diodes were reversed -- fixed so they actually clamp (D high->cathode to +15, D low->anode to -15). - BOM part numbers had a bogus "W16" suffix; corrected to S08-U (SO-8). Noted INA134/SSM2141 as pin-compatible 2nd sources for long-term availability. ERC 0 errors, netlist 0 errors. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-05-30 19:48:41 -05:00
Me Here	87caa933ea	PM_K-1 hardware: core-board design-of-record + KiCad scaffold Heirloom pro-audio modular brain/face design captured under hardware/: - DESIGN.md: full spec (RP2350, ±15V studio rails via TPS65131+TPS7A LDOs, PCM5102A click, THAT1240/1646 balanced click-injector with switchable protected line/instrument input, fail-safe mute relay, series ground-lift, USB-MIDI default + DNP hardware MIDI, sig/clip detect, ESD/EMI, chassis), plus the two-interconnect pinouts (Pico-compatible digital ribbon + separate analog/MIDI). - BOM.csv: manufacturer part numbers + rough costs. - kicad/: valid KiCad 7 project + documented schematic canvas. PCB layout/routing remains the interactive step. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>	2026-05-30 11:42:45 -05:00

Author

SHA1

Message

Date

Me Here

075c1786af

PM_K-1 hardware: verify THAT1240 against datasheet; fix pinout + part numbers

Verified the receiver from THAT doc 600035 rev05 instead of guessing:
- THAT1240 = 0 dB (unity) -- correct as specced; 1243=-3dB, 1246=-6dB would be wrong.
- SO-8 pinout 1=Ref 2=In- 3=In+ 4=Vee 5=Sense 6=Vout 7=Vcc 8=NC. My initial
  SKiDL pins were mostly wrong; corrected. Netlist now matches the datasheet.
- KiCad Device:D is pin1=K/pin2=A; my clamp diodes were reversed -- fixed so they
  actually clamp (D high->cathode to +15, D low->anode to -15).
- BOM part numbers had a bogus "W16" suffix; corrected to S08-U (SO-8). Noted
  INA134/SSM2141 as pin-compatible 2nd sources for long-term availability.

ERC 0 errors, netlist 0 errors.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-05-30 19:48:41 -05:00

Me Here

87caa933ea

PM_K-1 hardware: core-board design-of-record + KiCad scaffold

Heirloom pro-audio modular brain/face design captured under hardware/:
- DESIGN.md: full spec (RP2350, ±15V studio rails via TPS65131+TPS7A LDOs,
  PCM5102A click, THAT1240/1646 balanced click-injector with switchable
  protected line/instrument input, fail-safe mute relay, series ground-lift,
  USB-MIDI default + DNP hardware MIDI, sig/clip detect, ESD/EMI, chassis),
  plus the two-interconnect pinouts (Pico-compatible digital ribbon + separate
  analog/MIDI).
- BOM.csv: manufacturer part numbers + rough costs.
- kicad/: valid KiCad 7 project + documented schematic canvas. PCB
  layout/routing remains the interactive step.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-05-30 11:42:45 -05:00

2 commits