{"entries":[{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"hash":"bef012253434878a86979058a81150585eff257e","message":"first-pass 3D-printable enclosure in OpenSCAD\n\nThe assembled nightstand unit gets a printable shell. `make enclosure`\nrenders three STLs to `enclosure/build/`: the chassis (open-bottom shell\nwith integrated top), a separate bottom plate that screws on with four\nM3 self-tap screws, and a translucent snooze cap. The chassis houses\nthe Atom Echo press-fit onto a daughterboard via M5's 5+4 \"Atom Stack\"\nheader pattern, a MAX98357A I2S amp, and the Adafruit 1314 speaker.\nSnooze cap on the front-top half presses the Atom's button via a\ncaptive plunger; speaker fires up through a perforated grille on the\nrear-top half; USB-C exits a cutout in the back wall.\n\nLayout decisions worth flagging for future archaeology:\n\n* Speaker fires up — less directional, more room-filling for a\n nightstand. Snooze cap on the near (front) half of the top, grille on\n the far (rear) half.\n* No internal divider between the snooze and speaker zones — single\n shared chamber so the USB-C cable can route from the front-mounted\n Atom straight to the rear cutout. White noise through a 3\" driver\n doesn't need a sealed speaker chamber.\n* Press-fit on the 5+4 side headers as the only Atom mount — no screws\n on the Atom itself. M5's mechanical drawing shows two M2 mounting\n holes on the bottom face, but they aren't externally accessible on\n the actual unit (covered by the label sticker).\n* Bottom plate screws into corner bosses with M3 self-tap into PLA;\n four register tabs on the plate keep it laterally aligned during\n assembly before the screws snug.\n* 1.5 mm fillet on visible top + side edges; cap top has a 1.5 mm\n spherical dome for tactile cue in the dark.\n* Daughterboard is hand-soldered protoboard, not a custom-fab PCB.\n Standoffs at the four corners of a 38 × 38 footprint for now; will\n re-tune once a real piece of perfboard is on the bench.\n\nThe reference docs needed several corrections that fell out of measuring\nthe actual hardware (photos of the bottom, back, and top-right faces\nadded under `reference/atom-echo/`):\n\n* Bottom face has the 5+4 press-fit headers + a male HY2.0-4P GROVE in\n the middle.\n* USB-C is on the back face, not the top.\n* The onboard NS4168 speaker grille shares the top face with the\n button, not the front.\n* Planned MAX98357A wiring: I2S DIN moves from G21 (which isn't exposed\n on the Atom's external pins) to G25.\n* Stale PAM8302 references in the Adafruit 1314 doc updated to\n MAX98357A — that path was the rejected analog-amp architecture.\n\nReferences:\n\n* https://docs.m5stack.com/en/atom/atomecho\n* https://www.adafruit.com/product/3006 (MAX98357A breakout)\n* https://www.adafruit.com/product/1314 (3\" 4Ω speaker)\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"3afad1a385ef1d2c61fa67a6e67b29a1879b78bf"},"mode":"0100644","name":"atom-back.jpg","size":1531854},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"hash":"bef012253434878a86979058a81150585eff257e","message":"first-pass 3D-printable enclosure in OpenSCAD\n\nThe assembled nightstand unit gets a printable shell. `make enclosure`\nrenders three STLs to `enclosure/build/`: the chassis (open-bottom shell\nwith integrated top), a separate bottom plate that screws on with four\nM3 self-tap screws, and a translucent snooze cap. The chassis houses\nthe Atom Echo press-fit onto a daughterboard via M5's 5+4 \"Atom Stack\"\nheader pattern, a MAX98357A I2S amp, and the Adafruit 1314 speaker.\nSnooze cap on the front-top half presses the Atom's button via a\ncaptive plunger; speaker fires up through a perforated grille on the\nrear-top half; USB-C exits a cutout in the back wall.\n\nLayout decisions worth flagging for future archaeology:\n\n* Speaker fires up — less directional, more room-filling for a\n nightstand. Snooze cap on the near (front) half of the top, grille on\n the far (rear) half.\n* No internal divider between the snooze and speaker zones — single\n shared chamber so the USB-C cable can route from the front-mounted\n Atom straight to the rear cutout. White noise through a 3\" driver\n doesn't need a sealed speaker chamber.\n* Press-fit on the 5+4 side headers as the only Atom mount — no screws\n on the Atom itself. M5's mechanical drawing shows two M2 mounting\n holes on the bottom face, but they aren't externally accessible on\n the actual unit (covered by the label sticker).\n* Bottom plate screws into corner bosses with M3 self-tap into PLA;\n four register tabs on the plate keep it laterally aligned during\n assembly before the screws snug.\n* 1.5 mm fillet on visible top + side edges; cap top has a 1.5 mm\n spherical dome for tactile cue in the dark.\n* Daughterboard is hand-soldered protoboard, not a custom-fab PCB.\n Standoffs at the four corners of a 38 × 38 footprint for now; will\n re-tune once a real piece of perfboard is on the bench.\n\nThe reference docs needed several corrections that fell out of measuring\nthe actual hardware (photos of the bottom, back, and top-right faces\nadded under `reference/atom-echo/`):\n\n* Bottom face has the 5+4 press-fit headers + a male HY2.0-4P GROVE in\n the middle.\n* USB-C is on the back face, not the top.\n* The onboard NS4168 speaker grille shares the top face with the\n button, not the front.\n* Planned MAX98357A wiring: I2S DIN moves from G21 (which isn't exposed\n on the Atom's external pins) to G25.\n* Stale PAM8302 references in the Adafruit 1314 doc updated to\n MAX98357A — that path was the rejected analog-amp architecture.\n\nReferences:\n\n* https://docs.m5stack.com/en/atom/atomecho\n* https://www.adafruit.com/product/3006 (MAX98357A breakout)\n* https://www.adafruit.com/product/1314 (3\" 4Ω speaker)\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"3afad1a385ef1d2c61fa67a6e67b29a1879b78bf"},"mode":"0100644","name":"atom-bottom.jpg","size":4178219},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"hash":"bef012253434878a86979058a81150585eff257e","message":"first-pass 3D-printable enclosure in OpenSCAD\n\nThe assembled nightstand unit gets a printable shell. `make enclosure`\nrenders three STLs to `enclosure/build/`: the chassis (open-bottom shell\nwith integrated top), a separate bottom plate that screws on with four\nM3 self-tap screws, and a translucent snooze cap. The chassis houses\nthe Atom Echo press-fit onto a daughterboard via M5's 5+4 \"Atom Stack\"\nheader pattern, a MAX98357A I2S amp, and the Adafruit 1314 speaker.\nSnooze cap on the front-top half presses the Atom's button via a\ncaptive plunger; speaker fires up through a perforated grille on the\nrear-top half; USB-C exits a cutout in the back wall.\n\nLayout decisions worth flagging for future archaeology:\n\n* Speaker fires up — less directional, more room-filling for a\n nightstand. Snooze cap on the near (front) half of the top, grille on\n the far (rear) half.\n* No internal divider between the snooze and speaker zones — single\n shared chamber so the USB-C cable can route from the front-mounted\n Atom straight to the rear cutout. White noise through a 3\" driver\n doesn't need a sealed speaker chamber.\n* Press-fit on the 5+4 side headers as the only Atom mount — no screws\n on the Atom itself. M5's mechanical drawing shows two M2 mounting\n holes on the bottom face, but they aren't externally accessible on\n the actual unit (covered by the label sticker).\n* Bottom plate screws into corner bosses with M3 self-tap into PLA;\n four register tabs on the plate keep it laterally aligned during\n assembly before the screws snug.\n* 1.5 mm fillet on visible top + side edges; cap top has a 1.5 mm\n spherical dome for tactile cue in the dark.\n* Daughterboard is hand-soldered protoboard, not a custom-fab PCB.\n Standoffs at the four corners of a 38 × 38 footprint for now; will\n re-tune once a real piece of perfboard is on the bench.\n\nThe reference docs needed several corrections that fell out of measuring\nthe actual hardware (photos of the bottom, back, and top-right faces\nadded under `reference/atom-echo/`):\n\n* Bottom face has the 5+4 press-fit headers + a male HY2.0-4P GROVE in\n the middle.\n* USB-C is on the back face, not the top.\n* The onboard NS4168 speaker grille shares the top face with the\n button, not the front.\n* Planned MAX98357A wiring: I2S DIN moves from G21 (which isn't exposed\n on the Atom's external pins) to G25.\n* Stale PAM8302 references in the Adafruit 1314 doc updated to\n MAX98357A — that path was the rejected analog-amp architecture.\n\nReferences:\n\n* https://docs.m5stack.com/en/atom/atomecho\n* https://www.adafruit.com/product/3006 (MAX98357A breakout)\n* https://www.adafruit.com/product/1314 (3\" 4Ω speaker)\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"3afad1a385ef1d2c61fa67a6e67b29a1879b78bf"},"mode":"0100644","name":"atom-top-right.jpg","size":1495951},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"hash":"82210c199dabba760a55b43c2d4bf2c0fa7e58b7","message":"Initial commit\n\nTwo-Atom-Echo nightstand sound machine project. Includes design docs\n(MQTT contract, operating modes, signal chain), hardware reference\n(Atom Echo pinmap, datasheets, speaker notes), and a v0.0.1 Rust\nfirmware that boots, reads the button, and plays a beep through the\nonboard amp.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"1f7cc91d06086b73eeafdb8f060913d199e66038"},"mode":"0100644","name":"atomecho_sch_01.png","size":288820},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"hash":"82210c199dabba760a55b43c2d4bf2c0fa7e58b7","message":"Initial commit\n\nTwo-Atom-Echo nightstand sound machine project. Includes design docs\n(MQTT contract, operating modes, signal chain), hardware reference\n(Atom Echo pinmap, datasheets, speaker notes), and a v0.0.1 Rust\nfirmware that boots, reads the button, and plays a beep through the\nonboard amp.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"1f7cc91d06086b73eeafdb8f060913d199e66038"},"mode":"0100644","name":"atomecho_sch_01.webp","size":185370},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"hash":"bef012253434878a86979058a81150585eff257e","message":"first-pass 3D-printable enclosure in OpenSCAD\n\nThe assembled nightstand unit gets a printable shell. `make enclosure`\nrenders three STLs to `enclosure/build/`: the chassis (open-bottom shell\nwith integrated top), a separate bottom plate that screws on with four\nM3 self-tap screws, and a translucent snooze cap. The chassis houses\nthe Atom Echo press-fit onto a daughterboard via M5's 5+4 \"Atom Stack\"\nheader pattern, a MAX98357A I2S amp, and the Adafruit 1314 speaker.\nSnooze cap on the front-top half presses the Atom's button via a\ncaptive plunger; speaker fires up through a perforated grille on the\nrear-top half; USB-C exits a cutout in the back wall.\n\nLayout decisions worth flagging for future archaeology:\n\n* Speaker fires up — less directional, more room-filling for a\n nightstand. Snooze cap on the near (front) half of the top, grille on\n the far (rear) half.\n* No internal divider between the snooze and speaker zones — single\n shared chamber so the USB-C cable can route from the front-mounted\n Atom straight to the rear cutout. White noise through a 3\" driver\n doesn't need a sealed speaker chamber.\n* Press-fit on the 5+4 side headers as the only Atom mount — no screws\n on the Atom itself. M5's mechanical drawing shows two M2 mounting\n holes on the bottom face, but they aren't externally accessible on\n the actual unit (covered by the label sticker).\n* Bottom plate screws into corner bosses with M3 self-tap into PLA;\n four register tabs on the plate keep it laterally aligned during\n assembly before the screws snug.\n* 1.5 mm fillet on visible top + side edges; cap top has a 1.5 mm\n spherical dome for tactile cue in the dark.\n* Daughterboard is hand-soldered protoboard, not a custom-fab PCB.\n Standoffs at the four corners of a 38 × 38 footprint for now; will\n re-tune once a real piece of perfboard is on the bench.\n\nThe reference docs needed several corrections that fell out of measuring\nthe actual hardware (photos of the bottom, back, and top-right faces\nadded under `reference/atom-echo/`):\n\n* Bottom face has the 5+4 press-fit headers + a male HY2.0-4P GROVE in\n the middle.\n* USB-C is on the back face, not the top.\n* The onboard NS4168 speaker grille shares the top face with the\n button, not the front.\n* Planned MAX98357A wiring: I2S DIN moves from G21 (which isn't exposed\n on the Atom's external pins) to G25.\n* Stale PAM8302 references in the Adafruit 1314 doc updated to\n MAX98357A — that path was the rejected analog-amp architecture.\n\nReferences:\n\n* https://docs.m5stack.com/en/atom/atomecho\n* https://www.adafruit.com/product/3006 (MAX98357A breakout)\n* https://www.adafruit.com/product/1314 (3\" 4Ω speaker)\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"3afad1a385ef1d2c61fa67a6e67b29a1879b78bf"},"mode":"0100644","name":"dimensions.md","size":3021},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"hash":"82210c199dabba760a55b43c2d4bf2c0fa7e58b7","message":"Initial commit\n\nTwo-Atom-Echo nightstand sound machine project. Includes design docs\n(MQTT contract, operating modes, signal chain), hardware reference\n(Atom Echo pinmap, datasheets, speaker notes), and a v0.0.1 Rust\nfirmware that boots, reads the button, and plays a beep through the\nonboard amp.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"1f7cc91d06086b73eeafdb8f060913d199e66038"},"mode":"0100644","name":"disabling-internal-speaker.md","size":3635},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"hash":"82210c199dabba760a55b43c2d4bf2c0fa7e58b7","message":"Initial commit\n\nTwo-Atom-Echo nightstand sound machine project. Includes design docs\n(MQTT contract, operating modes, signal chain), hardware reference\n(Atom Echo pinmap, datasheets, speaker notes), and a v0.0.1 Rust\nfirmware that boots, reads the button, and plays a beep through the\nonboard amp.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"1f7cc91d06086b73eeafdb8f060913d199e66038"},"mode":"0100644","name":"module-size.jpg","size":393412},{"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T10:19:17.000000-04:00"},"hash":"82210c199dabba760a55b43c2d4bf2c0fa7e58b7","message":"Initial commit\n\nTwo-Atom-Echo nightstand sound machine project. Includes design docs\n(MQTT contract, operating modes, signal chain), hardware reference\n(Atom Echo pinmap, datasheets, speaker notes), and a v0.0.1 Rust\nfirmware that boots, reads the button, and plays a beep through the\nonboard amp.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"1f7cc91d06086b73eeafdb8f060913d199e66038"},"mode":"0100644","name":"pinmap.md","size":2403}],"lastCommit":{"author":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"committer":{"email":"chris@theguidrys.us","name":"Chris Guidry","when":"2026-04-25T21:03:38.000000-04:00"},"hash":"bef012253434878a86979058a81150585eff257e","message":"first-pass 3D-printable enclosure in OpenSCAD\n\nThe assembled nightstand unit gets a printable shell. `make enclosure`\nrenders three STLs to `enclosure/build/`: the chassis (open-bottom shell\nwith integrated top), a separate bottom plate that screws on with four\nM3 self-tap screws, and a translucent snooze cap. The chassis houses\nthe Atom Echo press-fit onto a daughterboard via M5's 5+4 \"Atom Stack\"\nheader pattern, a MAX98357A I2S amp, and the Adafruit 1314 speaker.\nSnooze cap on the front-top half presses the Atom's button via a\ncaptive plunger; speaker fires up through a perforated grille on the\nrear-top half; USB-C exits a cutout in the back wall.\n\nLayout decisions worth flagging for future archaeology:\n\n* Speaker fires up — less directional, more room-filling for a\n nightstand. Snooze cap on the near (front) half of the top, grille on\n the far (rear) half.\n* No internal divider between the snooze and speaker zones — single\n shared chamber so the USB-C cable can route from the front-mounted\n Atom straight to the rear cutout. White noise through a 3\" driver\n doesn't need a sealed speaker chamber.\n* Press-fit on the 5+4 side headers as the only Atom mount — no screws\n on the Atom itself. M5's mechanical drawing shows two M2 mounting\n holes on the bottom face, but they aren't externally accessible on\n the actual unit (covered by the label sticker).\n* Bottom plate screws into corner bosses with M3 self-tap into PLA;\n four register tabs on the plate keep it laterally aligned during\n assembly before the screws snug.\n* 1.5 mm fillet on visible top + side edges; cap top has a 1.5 mm\n spherical dome for tactile cue in the dark.\n* Daughterboard is hand-soldered protoboard, not a custom-fab PCB.\n Standoffs at the four corners of a 38 × 38 footprint for now; will\n re-tune once a real piece of perfboard is on the bench.\n\nThe reference docs needed several corrections that fell out of measuring\nthe actual hardware (photos of the bottom, back, and top-right faces\nadded under `reference/atom-echo/`):\n\n* Bottom face has the 5+4 press-fit headers + a male HY2.0-4P GROVE in\n the middle.\n* USB-C is on the back face, not the top.\n* The onboard NS4168 speaker grille shares the top face with the\n button, not the front.\n* Planned MAX98357A wiring: I2S DIN moves from G21 (which isn't exposed\n on the Atom's external pins) to G25.\n* Stale PAM8302 references in the Adafruit 1314 doc updated to\n MAX98357A — that path was the rejected analog-amp architecture.\n\nReferences:\n\n* https://docs.m5stack.com/en/atom/atomecho\n* https://www.adafruit.com/product/3006 (MAX98357A breakout)\n* https://www.adafruit.com/product/1314 (3\" 4Ω speaker)\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \n","tree":"3afad1a385ef1d2c61fa67a6e67b29a1879b78bf"}}