Our own circuit boards, in the garage door opener's head

Boards we design for the smart garage door opener, with every chip soldered on them: the RV1126B processor and its memory, the door camera chip, the heat chip, the mic and temperature chips, the call lights and tone, the security chip, the opener link, and on its own board the supply from the opener’s mains and a backup cell. They fill the two end bays of the same 300 × 460 × 180 mm opener head, either side of the opener’s own motor and logic board; one latched lead joins them. No plugs, ribbons or adapters inside.

Stage 1 of 6 done: shape and placementNot yet ready to manufactureUpdated 4 November 2026 · rev A-0

Design files Design review Quote pack Who can make it Our board platform

The board in 3D

Every part at its real size, in its real place. Turn it, zoom in, switch between the boards in the opener head and laid flat, and click any part to see what it is. The chip bodies are simple blocks until each part's own 3D model is added.

Show the head

Loading the 3D board…

Drag to turn · scroll to zoom · right-drag to move · click a partDrag to turn · tap a part

Where everything is in the opener head

Door cameradoor-end wall

A bare Sony IMX415 camera chip under a 102° M12 lens on a tab, 25° down through the 30 mm window: the door, both ends of its bottom edge, the doorway, both bays and the driveway when the door is open.

Processor and radiomain board, door end

The RV1126B with its memory on the main board behind the door-end wall, under a finned heat sink; Wi-Fi and BLE with a chip antenna in the corner farthest from the opener’s steel motor frame.

Call lights and toneside walls and door end

Two light strips fold out from the main board onto the side walls, 8 LEDs each behind the call-light slots; the piezo sits over the tone holes. Together they give the 5 s flashing light and sound UL 325 asks for before every remote close.

Heat cameraback-end wall

A Melexis MLX90640 heat chip on a tab, 40° down through the back window at the water heater’s pan and the back of the bay.

Opener link, mic and temperaturepower board

One isolated relay presses the opener’s own wall-button input; an optocoupler reads its door position and a divider its backup battery. The mic and the temperature chip sit behind new vents in the back-end wall.

Power and backup cellpower board

The opener’s own mains into a class II 5 V supply, and one soldered 18650 cell with a thermistor that keeps the head watching and listening for about 7 h in a power cut.

The opener-head boards laid flat, both sides, every part at its real size

Laid flat: the main board with its two light strips at its ends and its camera tab on the right; the power board below it with its heat-camera tab. Tap the drawing to open it full size.

Design review: checked before we order

Every board-level number GarageOne's calls depend on, checked against its target with the source of each number, using the rules every one of our boards shares (products/_shared/board-rules.mjs). Fixed means a lesson changed this board; to prove means it passes on paper and is measured on rev A before boards are ordered.

No check fails18 pass · 4 fixed by the review · 11 to prove before we order · 0 failDesign review of 4 November 2026

Area	Check	Our board	Target	Status
Camera	Door camera: a parcel (0.3 m) on the driveway 3 m past the open door at 6.68 m M12 lens, 102° across: about 37.6 px per degree across 3840 px. The parcel and visitor detector works from about 20 px across the object (est.); the driveway is masked past the property line.	96.9 px	≥ 20 px	passes
Camera	Door camera: frame rate the calls need A standard mode of the IMX415.	5 fps at 3840 × 2160	chip: 30 fps at 3840 × 2160	passes
Camera	Door camera: data rate vs its 4-lane link 88 % spare on the link.	0.41 Gbps (10-bit)	≤ 80 % of 3.564 Gbps	passes
Camera	Door camera: a small child (0.25 m wide) at the far end of the doorway at 4.67 m M12 lens, 102° across: about 37.6 px per degree across 3840 px. The doorway check before every close must find a crouching child at the far end of a 16 ft door; under 90 % sure it calls "unsure" and the door does not move.	115.4 px	≥ 20 px	passes
Camera	Door camera: frame rate the calls need A standard mode of the IMX415.	5 fps at 3840 × 2160	chip: 30 fps at 3840 × 2160	passes
Camera	Door camera: data rate vs its 4-lane link 88 % spare on the link.	0.41 Gbps (10-bit)	≤ 80 % of 3.564 Gbps	passes
Camera	Heat camera: water in the heater's drain pan (0.3 m patch) at 2.97 m 32 × 24 pixels across 110°: 0.3 px per degree. The relief pipe itself (about 20 mm) is under one heat pixel at this distance, so the drip call reads the water landing in the pan, not the pipe: a cooler or warmer patch against the dry pan, averaged over many frames. It is an assist call.	1.7 px	≥ 1 px	passes
Camera	Image processor load, all cameras 2 cameras into one image processor.	83 Mpx/s	≤ 360 Mpx/s (RV1126B ISP)	passes
Camera	AI engine time per frame One person-and-vehicle model (int8) on the door camera at 5 fps when the door moves or something changes, 2 fps otherwise; the alarm-pattern listener on the mic runs on the CPU. Measured on the dev kit.	3 TOPS	the doorway check within 1 s of a close being asked for; car, person and parcel checks at 2 frames a second	to prove on the dev kit
Power	Supply About 2.4 W watching (RV1126B 1.5 W, camera 0.3 W, heat chip 0.1 W, Wi-Fi/BT 0.3 W, mic, temperature, ADC 0.05 W, the rest 0.15 W) and 5.5 W at a close warning with all 16 LEDs and the tone and the cell charging at 0.5 A (est.): 55 % of the supply.	Mean Well IRM-10-5 PCB-mount 5 V 10 W supply (class II, listed) on the opener's own mains, on the power board	≤ 70 % of the supply (7 W)	passes
Power	Power cut The door itself runs on the opener's own backup battery (California SB 969); our cell keeps the head watching and listening. Alerts need the home router to have power; pulling the opener's plug is part of the rev A tests. A thermistor holds charging outside 0 to 45 °C (lesson: charge).	one soldered 18650 cell (Samsung INR18650-35E) on the power board: in a power cut the camera drops to 1 frame a second and the heat chip to one frame a minute, about 1.0 W, about 7 h on an aged, cold cell (est.)	the "power cut" alert, the door state and the alarm listener for 4 h	to prove on the dev kit
Heat	RV1126B temperature, a summer garage (45 °C air at the ceiling) with the head closed The air in the door bay: 45 °C at the ceiling of a hot garage plus about 5 K from the opener's motor and our boards in the closed head (est.). 1.5 W through a 25 × 25 × 12 finned aluminium heat sink and gap pad into the door bay's air, 6 mm clear of the wall (12 K/W, est.).	68 °C	≤ 85 °C (rated)	passes
Heat	Camera chip away from the processor A warm sensor adds noise.	door camera 147 mm	≥ 30 mm	passes
Heat	Temperature chip away from the supply The freezing call needs the garage air, not the board: the supply and the cell charger warm the board. The reading is checked against a reference in a cold chamber on rev A.	SHT45 222 mm from the IRM-10-5, on an island cut free by a slot	≥ 150 mm, and reads within 1 °C of the garage	to prove on the dev kit
Shock	Shock and vibration Motor start and stop every cycle and the rail shaking through the head's straps: about 20 g at the boards on their stand-offs (est.). MEMS clocks are fitted anyway, and the card socket is latched.	20 g (est.)	standard parts	passes
Software	Starts our software from the microSD card, no setup Owner requirement: power it from its own supply and our software runs from the card. Rev A and sale boards boot from the card; the eMMC holds no system copy (it ships empty, so the card always starts first: Rockchip tries the eMMC before the card) and keeps the call and door log. Updates write to the card with two system copies, only with the door closed and no one in the garage, never during a close.	microSD socket with a hinged, latched lid (Amphenol 101-00660 class), fitted on every board: our software starts from the card	card socket fitted on every board, latched	passes
Software	Card power switch and protection A card that hangs must be restarted by cutting its power, not the whole board; the card slot is the one place a person touches the electronics (lesson: sdstart). Change: U90, U91 added (4 Nov 2026, CricketOne card-start review).	1 power switch and 1 ESD array for 1 card socket	every socket: switched card supply, ESD on all 6 lines	fixed by the review
Software	The card wins the start Rockchip's start order is SPI flash, eMMC, card, USB: a written eMMC starts before the card. Proved on the dev kit: power on with a card in and the eMMC empty (lesson: sdstart). Change: eMMC ships empty and the loader reads the card first (4 Nov 2026; it used to say the eMMC kept a copy, which would have started instead of the card).	eMMC shipped empty; our loader reads the card first	the processor starts from the card every time	fixed by the review
Software	Card grade Consumer cards wear out and fail hot; the image is read-only with a separate data partition. Proved: 1,000 power cuts during writes on rev A (lesson: sdstart).	industrial pSLC microSD (Kingston Industrial or Swissbit S-56u), −40 to 85 °C	rated for the heat, cold and writes	to prove on the dev kit
Software	Clip buffer for an unsure call The rest of the memory holds Linux, the program and the AI model (lesson: clip).	19.8 s of 8-bit 5 fps video in 40 % of the 2 GB memory	≥ 3 s	passes
Radio	Wi-Fi/BT module clock The AP6256 runs from its own 37.4 MHz reference clock; a wrong or missing clock means no Wi-Fi or Bluetooth at all (lesson: wificlock). Change: the AP6256 had no clock on the board; Y3, a 37.4 MHz MEMS oscillator, added next to it (4 Nov 2026, from the CricketOne test-board circuit).	37.4 MHz MEMS oscillator (Y3)	37.4 MHz next to the AP6256	fixed by the review
Radio	Home Wi-Fi and BLE from inside the opener head The head is plastic, but the opener's steel motor frame and the steel rail are 125 mm away and garages are often far from the router; the antenna sits in the corner farthest from the steel. Measured on rev A (lesson: antenna).	AP6256 with a chip antenna at the main board's top left corner, behind the ABS door-end wall	the home Wi-Fi at the far end of a two-car garage, BLE pairing at the wall control	to prove on the dev kit
Layout	Fast lines on a solid ground plane The layout rules go to the maker in the quote; the routed board's design rule check (0 copper errors, every keep-out kept) and the maker's impedance coupon prove them (lesson: planes).	RV1126B memory; 1 camera MIPI link (100 Ω pairs); USB (90 Ω); antenna feed (50 Ω, keep-out on every layer); card lines (length-matched, no vias under the socket)	ground on inner layer 1, supply on inner layer 2, no vias in pads, impedance lines routed first	to prove on the dev kit
Moisture	Conformal coating A garage runs from freezing to hot, with condensation on cold mornings and road salt brought in on cars; both boards, both strips and both tabs get the same coat. Asked for in the quote (lesson: moisture).	coated	coated, sensors, sockets and antennas masked	passes
Fit	Board inside the product CAD, every part checked in 3D The board is checked on its own; the rev T CAD run places it in the product and checks every part in 3D (lesson: fit3d).	not yet in the product CAD	nothing touches	to prove on the dev kit
Camera	Every garage call in view Every inView target from the CAD (both ends of the door's bottom edge and its top section, a child and an adult in the doorway, the roof and bonnet of the two cars, the driveway 3 m out, someone by the side wall; the heater pan and relief pipe, the back of the bay) from each lens or chip's real place on our boards.	Door camera: worst 44.1° / 20.7°; Heat camera: worst 29.2° / 11.3°	inside each sensor's view	passes
Camera	Door camera and heat camera windows The 30 mm windows sized for the bench modules also take our M12 lens and the bare heat chip: the lens front sits just inside the 3 mm wall, so even the call by the side wall, 44° across, clears the edge (lesson: window).	door 30 × 30 (margin 4.1 mm, steepest line of sight 57°); heat 30 × 30 (margin 5.7 mm, steepest 60°)	each view inside its window	passes
Fit	Sensor tabs on their brackets Each tab hangs off its board and is held on its sensor's axis by a printed bracket; the brackets go in the rev T CAD and are checked in 3D there (lesson: fit3d).	Door camera: 0.3 mm inside the wall, hinge 11.8 mm; Heat camera: 0.3 mm inside the wall, hinge 8.4 mm	chip or holder ≥ 0.3 mm inside the wall, hinge within the 40 mm flex	to prove on the dev kit
Fit	Lights, tone and vents at their openings The bench head had its vents in the right side wall of the back bay, where our power board cannot reach without a third strip; the vents now sit in the back-end wall in front of the chips. Change: CAD rev T: vents moved to the back-end wall; lead notches in both bay walls; a magnet boss under the cover (4 Nov 2026).	8 LEDs on each light strip inside the 60 × 14 side slot; the piezo over the tone holes; the SHT45 and the mic port behind the two rows of back-end vents	each at its opening	fixed by the review
Safety	The opener stays in charge of the door It presses the same button the wall control does, after its own 5 s light and tone warning and a clear doorway; a board fault leaves the relay open, so the opener works as a plain opener.	one photo-MOS relay across the opener's wall-button pair (a momentary press), the door-position output through an optocoupler, the backup battery through a divider; nothing else wired to the opener	GarageOne never drives the motor; the opener's UL 325 board, reversal and eyes decide every move	passes
Safety	Mains kept on the power board The opener maker wires our power board as a listed component inside the head and re-lists the opener under UL 325 with it; creepage between the mains terminal and the opener terminal is checked in the layout.	the opener's mains tap into a spring-clamp terminal, fuse, varistor, IRM-10-5 (class II); only 5 V, I²C and I²S on lead L1	class II creepage on the power board; no mains on any other board	to prove on the dev kit
Security	Cover tamper sensor The bench used a plunger switch under the cover; the Hall chip needs no moving part, and its switch point is set on rev A.	TMAG5273 3D Hall chip at the right strip's top edge, 11.8 mm from a Ø8 × 3 magnet in a boss under the cover	cover off = logged and signed	to prove on the dev kit
Fit	Leads L1 is clipped to the side wall past the motor bay; the I²S runs at 1.5 MHz with series resistors. L2 is wired by the opener maker to its own board's terminals.	L1 about 0.6 m along the right side wall through the bay-wall notches (0.038 V drop); L2 about 0.35 m to the opener's logic board	leads ≤ 0.15 V drop; clipped clear of the motor and gearbox	to prove on the dev kit

Before we order the first boards, we prove these on the RV1126B development kit or in the rev A tests:

AI engine time per frame
Power cut
Temperature chip away from the supply
Card grade
Home Wi-Fi and BLE from inside the opener head
Fast lines on a solid ground plane
Board inside the product CAD, every part checked in 3D
Sensor tabs on their brackets
Mains kept on the power board
Cover tamper sensor
Leads

Where the design stands

1Shape and placementdone
Main board with its camera tab and two light strips, power board with its heat-camera tab, in the head’s two end bays, all 57 parts placed at their real size, every view checked through its window in 3D and KiCad design rule check (0 violations).
2Schematicnext
Every wire between the chips, from the V1 core, C1 camera, opener link and power circuits.
3Footprintsnext
The exact solder pads under each chip.
4Routinglater
Copper tracks on all layers, the camera lanes over the tab hinge.
5Files for the makerlater
Gerbers with copper, drill, mask, paste and the assembly parts list. These go to the board maker.
6Rev A boardsMar 2027
Made, assembled and tested on our fixture.

Design files (rev A-0)

These are the stage 1 files: the board's shape and where every part goes. A board maker needs the stage 5 files to build it.

All files (zip)Everything below in one download, with the quote and review KiCad boardgarageone-board.kicad_pcb: open with KiCad 10 (free)3D model (STEP)The bare boards for mechanical CAD Side A drawing (PDF)To the end and side walls Side B drawing (PDF)Into the head Parts and placement (CSV)Every part, its size, side and position

Who can make it

The opener-head set is an 8-layer main board with a camera tab on a flex hinge and two 2-layer light strips on flex folds, and a 4-layer power board with a heat-camera tab. It needs a maker who builds rigid-flex and fine-pitch ball-grid chips. We plan three quotes once the stage 5 files are ready: two from China for price, and one from the US for speed.

Maker	Where	Rigid-flex	HDI / layers	Assembly	Fit for us
PCBWayfirst quote	Shenzhen, China	yes, 6 to 16 layers	HDI up to 32 layers, 0.35 mm BGA pitch	yes, turnkey, incl. BGA and X-ray	Best fit for rev A: the rigid-flex board and its assembly in one order
NextPCBsecond quote	Shenzhen, China	yes	HDI, 6 to 32 layers	yes (PCBA)	Second quote, to compare price and lead time
ALLPCB	China (a network of partner factories)	yes, through partner factories	1 to 30 layers	yes	Third quote; check which factory builds it
JLCPCB	Shenzhen, China	no (flex only: 1, 2 and 4 layers, up to 490 mm)	HDI added Sep 2026	yes, incl. BGA	Not for the one-piece board today. Good for the test fixture, simple boards, and the fallback of separate rigid boards joined by soldered flex
Sierra Circuits (ProtoExpress)US quote	Sunnyvale, California, USA	yes	yes	yes, in-house, incl. BGA; turnkey in about 5 days	US option: fastest turn and engineering help, at a higher price
Cirexx	Santa Clara, California, USA	yes	yes	yes (turnkey or consigned)	Second US option
Advanced Circuits	Aurora, Colorado, USA	yes	check	yes	US quick-turn; check its rigid-flex assembly
Epec	New Bedford, Massachusetts, USA	yes	check	yes; also builds battery packs	US option that can also make a certified LiFePO4 pack

From each maker's own capability pages, checked 3 November 2026. Limits change, so each quote confirms them for our exact stack-up.

Full design notes

All 57 parts, what is on each piece, every connection, heat, power, the factory test, cost and timeline.

GarageOne: circuit boards of our own

What changed (4 Nov 2026). The rev A bench head is built from bought boards joined by leads: a Raspberry Pi Zero 2 W, a Camera Module 3 Wide on a ribbon, an MLX90640 board, a MAX9814 mic board with an MCP3008 ADC, an SHT45 board, an ATECC608 board, two NeoPixel sticks, a piezo, a D2F-01 switch, an IRM-10-5 and an 18650 with a charger board. GarageOne now gets boards of our own, like every IEMI product, with the chips soldered straight on them:

The chips: the V1 core (Rockchip RV1126B, 2 GB LPDDR4X, 16 GB eMMC, AMPAK AP6256 Wi-Fi/BT module), a bare Sony IMX415 8 MP camera chip under an M12 lens holder (the C1 camera on the board), a Melexis MLX90640 heat chip, a Sensirion SHT45 temperature chip, an ICS-43434 digital mic, 16 call-light LEDs, a piezo, a TMAG5273 Hall chip for the cover, a photo-MOS relay and an optocoupler for the opener link, an ADS1115 ADC for the opener’s backup battery, the security and ID chips.
The shape: the head is the same 300 × 460 × 180 mm opener head, and the opener’s own motor, gearbox and UL 325 logic board stay in its middle bay. So our boards fill the two end bays: an 8-layer main board (280 × 164 mm) stands 20 mm behind the door-end wall with the processor and the camera tab at the door window, and folds out into two 2-layer light strips (110 × 155 mm) on the side walls behind the call-light slots. A 4-layer power board (280 × 164 mm) stands 14 mm in front of the back-end wall with the opener’s mains, the backup cell and the opener link, and its heat-camera tab at the back window.
A fix in the same run (rev T CAD): the bench head had its mic and temperature vents in the right side wall of the back bay, out of reach of a board on the back wall. The vents now sit in the back-end wall, two rows right in front of the SHT45 and the mic port. Both bay walls get a 16 × 12 notch for lead L1, and a small boss under the cover holds the tamper magnet over the right light strip. Drawn in the CAD the same day.
Made from the shared rules: MEMS clocks, the latched microSD card with our software on every board, conformal coating against garage condensation and road salt, a thermistor on the backup cell, the camera 147 mm from the processor, every line of sight under 82° from its wall, the antenna in the corner farthest from the opener’s steel.

The bench head stays the test rig until the boards arrive. GarageOne never drives the motor: it presses the same wall-button input the wall control does, and the opener’s own UL 325 board, reversal and safety eyes decide every move.

1. The shape: two boards, two strips, two tabs

Piece	Size	Layers	Where	What
Main board	280 × 164 mm, 1.6 mm	8	standing 20 mm behind the door-end wall	the V1 core, card, security, Wi-Fi/BT and chip antenna, piezo, lead header
Door camera tab	16 × 16 mm, 0.8 mm, on a 40 mm flex hinge	4	on its axis, 25° down, the lens just inside the 30 × 30 door window	IMX415 under a 102° M12 lens
Light strips (2)	110 × 155 mm, 1.6 mm, on short flex folds from the main board’s ends	2	3 mm inside each side wall of the door bay	8 call-light LEDs each behind the 60 × 14 slot; the cover Hall chip on the right strip
Power board	280 × 164 mm, 1.6 mm	4	standing 14 mm in front of the back-end wall	mains terminal, fuse, IRM-10-5, backup cell and charger, opener terminal, relay, optocoupler, ADC and I/O, mic, temperature chip, lead header
Heat camera tab	16 × 16 mm, 0.8 mm, on a 40 mm flex hinge	4	on its axis, 40° down, just inside the 30 × 30 HDPE back window	MLX90640

Lead L1 (power board to main board: 5 V on two pairs, I²C, the mic’s I²S) is about 0.6 m of 22 AWG with Molex Micro-Fit 3.0 10-pin latched ends, clipped along the right side wall through the two bay-wall notches. Lead L2 (about 0.35 m) joins the power board’s opener terminal to the opener’s own logic board in the middle bay and is wired by the opener maker. The mains tap from the opener’s own mains terminal stays inside the head.

2. What is on the boards

Main board, side A (to the door-end wall): RV1126B (U1) under a 25 × 25 × 12 finned heat sink (HS1) with 6 mm of air to the wall; LPDDR4X (U2), eMMC (U11); the piezo (BZ1) over the tone holes, sealed to them by a foam ring; the door camera tab (U200, IMX415 under a 102° M12 lens, 25° down through the 30 × 30 window) held on its axis by a printed bracket.

Main board, side B (into the door bay): decoupling field (C1), power (U3), 24 MHz and 32 kHz MEMS oscillators (Y1, Y2), ATECC608B (U8), ID chip (U9), the latched microSD (J1, reached by taking off the cover), AP6256 (U5) with its chip antenna (ANT1) at the top left corner, camera supplies (U21), ESD array (U25), LED level shifter (U62), piezo driver (U63), eFuse (U42), lead header (J2), factory pads (TP1).

Light strips, side A (to the side walls): 8 WS2812B-2020 LEDs each (DL1–DL8, DR1–DR8) behind the opal side slots: green, amber, red and the white flash of the close warning. Right strip, side B: the TMAG5273 Hall chip (U7) at the top edge, 12 mm from the magnet in the cover boss.

Power board, side A (to the back-end wall): the SHT45 (U31) on an island cut free by a slot, behind the lower row of vents; the heat camera tab (U240, MLX90640, 40° down through the back window) on its printed bracket.

Power board, side B (into the back bay): spring-clamp terminal for the opener’s mains tap (J10) behind a printed shield, fuse and varistor (F10), IRM-10-5 (PS1), the 18650 holder and cell (BT1) with its thermistor (RT1), the charger (U50); the 5-pole opener terminal (J11), the photo-MOS relay across the wall-button pair (U70), the door-position optocoupler (U71), the ADS1115 ADC and TCA9534 I/O expander (U72), input guard (U73); the ICS-43434 bottom-port mic (U32) over a board hole behind the upper row of vents; heat camera supply (U23), lead header (J12), factory pads (TP2).

3. Every connection, checked

Every mating pair is checked against the makers’ documents, never “same as” another board.

Pair	Check	Status
Micro-Fit 3.0 43045-1012 headers and the L1 lead	positive latch, 10 circuits, 5 A per contact against 1.2 A peak	to read the Molex drawing
Opener terminal and the opener’s logic board	wall-button pair, door-position output and backup battery as the opener maker documents them; the photo-MOS relay rated above the wall-button voltage	with the opener maker
Mains tap and J10	WAGO 2604 class terminal for 18 AWG; class II creepage to the opener terminal	in the layout
IMX415 on its flex	4-lane MIPI over the 40 mm hinge, impedance-controlled	in the routing
microSD socket	hinged, latched lid (lesson: sdcard)	pass

4. Heat

About 1.5 W from the RV1126B goes through the finned heat sink into the door bay’s air (12 K/W est.), so the chip sits near 68 °C on a summer day with 45 °C at the garage ceiling and the head 5 K warmer inside. The camera chip is 147 mm from the processor, and the SHT45 is 222 mm from the supply on a slotted island so the freezing call reads the garage, not the board.

5. Power budget (est.)

State	Draw
Watching: door camera at 2 fps (5 fps when something moves), heat chip at 2 Hz, mic listening, Wi-Fi	2.4 W
A close warning: 16 LEDs flashing, the tone, the cell charging at 0.5 A	up to 5.5 W, 55 % of the 10 W supply
Power cut: camera at 1 fps, heat chip once a minute, alarm listener on	about 1.0 W, about 7 h on an aged, cold cell

6. Factory test (every board, every time)

Spring-pin fixture on TP1 and TP2: 5 V in, the eFuse trip at 3.5 A, every rail, boot from the card, a frame of a test chart from the camera, a hot plate seen by the heat chip, a test tone into the mic, the SHT45 against a reference, all 16 LEDs, the piezo, the Hall chip with a magnet, the relay contact closing, the position input, a test voltage on the battery input, the security chip’s key, the Wi-Fi and BLE links.

7. Who makes what

One maker makes the main board with its tab and light strips, the power board with its tab, assembles them (turnkey) and makes lead L1 to length. We supply the microSD cards with our software and the lens focused at 4 m (est.). The opener maker fits our boards into the head, wires the mains tap and lead L2 to its own board, and re-lists the opener under UL 325. The quote pack is /build/garageone-quote.

8. Cost per head, electronics (est.)

Item	Cost
V1 core (RV1126B, 2 GB LPDDR4X, 16 GB eMMC, power, AP6256, chip antenna)	$32
IMX415 camera chip, holder and lens	$14
MLX90640 heat chip	$45
SHT45, mic, ADC and I/O	$6
Photo-MOS relay, optocoupler, opener terminal	$3
IRM-10-5, mains terminal, fuse, cell, charger	$14
LEDs, piezo, Hall, security, ID, socket, passives	$7
Boards (8-layer main with a tab and two strips, 4-layer power with a tab), 1,000 heads	$28
Lead L1	$2
Assembly and test	$12
microSD card with our software	$4
Total	about $167 per head (est.)

The bench head’s bought boards cost about $198 at qty 1 (Pi Zero 2 W, camera, MLX90640 board, mic and ADC, SHT45, ATECC608, NeoPixels, supply, cell and small parts), so our boards are about $31 cheaper per head at 1,000 (est.). The heat chip is over a quarter of the cost; a cheaper 16 × 12 chip is checked against the pan call on rev A.

9. Timeline

Step	When
Shape and placement (this page)	done, 4 Nov 2026
Rev T CAD: the boards in the head CAD, every part checked in 3D; the vents, lead notches and magnet boss already drawn	next
Schematic, footprints, routing	Dec 2026 – Jan 2027
Rev A boards made and tested	Mar 2027 (est.)

10. Still to check

Wi-Fi from the head at the far end of a two-car garage, with the opener’s steel motor frame and rail 125 mm from the antenna.
The opener link with each opener maker’s wall-button input (some use a serial wall control, not a plain button pair).
The SHT45 reading against a reference in a cold chamber, with the supply and charger running.
The heat chip on a wet pan at 3 m, and whether a cheaper 16 × 12 chip still sees it.
The rev T CAD changes still to draw: the heat sink, the tab brackets, the board stand-offs and the printed shield over the mains terminal.

Sources

Rockchip RV1126B (Forlinx FET1126Bx-S): https://www.forlinx.net/product/rockchip-rv1126b-som-fet1126b-bj-s-174.html
Sony IMX415 (8.46 MP, 4-lane MIPI): https://www.sony-semicon.com/en/products/is/security/security.html
Melexis MLX90640: https://www.melexis.com/en/product/MLX90640/Far-Infrared-Thermal-Sensor-Array
Sensirion SHT45: https://sensirion.com/products/catalog/SHT45
TDK InvenSense ICS-43434: https://invensense.tdk.com/products/ics-43434/
TI TMAG5273: https://www.ti.com/product/TMAG5273
TI ADS1115: https://www.ti.com/product/ADS1115
Panasonic AQY212 PhotoMOS: https://industry.panasonic.com/global/en/products/control/relay/photomos
Mean Well IRM-10: https://www.meanwell.com/Upload/PDF/IRM-10/IRM-10-SPEC.PDF
Microchip ATECC608B: https://www.microchip.com/en-us/product/atecc608b
Samsung INR18650-35E: https://www.samsungsdi.com/
16 CFR 1211 (UL 325 for residential garage door operators): https://www.ecfr.gov/current/title-16/chapter-II/subchapter-B/part-1211
The head: products/garageone/cad/garageone-cad.mjs (rev A, vents, lead notches and magnet boss rev T); the boards: products/garageone/hardware/pcb/garageone-board.mjs

Design review (4 Nov 2026)

Every board is checked by the same rules (products/_shared/board-rules.mjs), one for each lesson any of our boards has taught us. GarageOne’s boards were made with every rule from the start: 18 pass, 4 fixed, 11 to prove, 0 fail. The full review, with every number and its source, is on the board page. It shows:

Camera pixels: a 0.3 m parcel on the driveway 3 m past the open door (6.7 m away) fills about 97 px against a 20 px need; a small child at the far end of the doorway (4.7 m) about 115 px; the 8 MP chip at 5 fps uses 12 % of its link. The heat chip puts about 1.7 px on a 0.3 m wet patch in the heater pan at 3 m.
What we learned about the heat camera: the water heater’s relief pipe (about 20 mm) is under one heat pixel at 3 m, so the drip call reads the water landing in the pan, not the pipe. It stays an assist call.
Every garage call in view: both ends of the door’s bottom edge and its top section, a child and an adult in the doorway, the roof and bonnet of the two cars, the driveway 3 m out, someone by the side wall (44° across, the worst); the heater pan and relief pipe and the back of the bay, from where each lens or chip really sits.
The vents moved (fixed): to the back-end wall, in front of the temperature chip and the mic port; lead notches and the magnet boss drawn in the CAD the same day.
The opener stays in charge: one isolated relay presses the wall-button input after our 5 s light and tone warning; a board fault leaves it open.
The latched microSD (J1) is fitted, and our software starts from it; updates run only with the door closed and no one in the garage.
Fast lines on a solid ground plane (to prove, lesson: planes, from the CricketOne test-board layout of 4 Nov 2026): RV1126B memory; 1 camera MIPI link (100 Ω pairs); USB (90 Ω); antenna feed (50 Ω, keep-out on every layer); card lines (length-matched, no vias under the socket). Ground on the layer next to the parts (inner layer 1, supply on inner layer 2; the whole bottom of a 2-layer section), one via beside each ground and supply pad and none in pads, no copper or vias in the antenna keep-out on any layer or under the card socket, the impedance lines routed first with a test coupon. The quote asks for it; the routed board’s design rule check proves it.
To prove on rev A: the AI time, the power-cut run on the cell, the SHT45 against a reference, Wi-Fi near the opener’s steel, the tab brackets, the mains creepage, the tamper magnet, the leads and the boards in the rev T CAD.

The request for quote is /build/garageone-quote.

New shared rule (4 Nov 2026, from the CricketOne test-board circuit): the Wi-Fi module’s own clock. Drawing CricketOne’s circuit pin by pin found that the AP6256 Wi-Fi/Bluetooth module runs from a 37.4 MHz reference clock, which our board notes had as 26 MHz or left out. Every board with an AP6256 is now checked for a 37.4 MHz clock beside it (MEMS where the product takes knocks). On this board the AP6256 had no clock of its own on the board; Y3, a 37.4 MHz MEMS oscillator, now sits next to it on side B. The review shows it under Radio (lesson: wificlock).