Sensor modules

AXS-003 — PIR motion sensor carrier PMOD module

Catalog #3 in the AruviX sensor line, level L1 (GPIO). Socketed carrier (same pattern as AXS-046) for a 3.3 V mini PIR breakout of the AS312/AM312 class — the pyro element and its BISS0001-style controller stay on the plug-in board.

Level L1 ERC clean DRC clean Fab package 5 components

3D render of the AXS-003 PCB — Rendered from the PCB layout. No physical board has been manufactured.

Circuit review & bench-test guide →

Components#

Every placed component, with the reason it is on the board. Extracted directly from the schematic, so this cannot drift from the design.

Ref	Value	What it does on this board	Part number	Footprint
`C1`	100nF 16V X7R	Socket decoupling	`GRM188R71C104KA01D` Murata	`C_0603_1608Metric`
`C2`	10uF 10V X5R	Bulk reservoir at the PIR socket (pyro front ends hate supply ripple)	`GRM21BR61A106KE19L` Murata	`C_0805_2012Metric`
`J1`	PMOD PLUG 2x6	PMOD peripheral plug (Digilent spec 1.2)	not selected generic	`PinHeader_2x06_P2.54mm_Horizontal`
`J2`	PIR BREAKOUT SOCKET	Socket for a 3.3 V mini PIR module, pin order VCC/OUT/GND	not selected generic	`PinSocket_1x03_P2.54mm_Vertical`
`R1`	100R	Series protection on the module-driven PIR line	`RC0603FR-07100RL` Yageo Datasheet ↗	`R_0603_1608Metric`

Signals#

Net labels used in the schematic, which are also the names the HDL top level should use.

3V3 GND PIR PIR_OUT

Production status#

Schematic ERC	0 violations
PCB layout	complete
DRC	0 violations
Fab package	exported (24 gerbers + drill + CPL + BOM)
Fabricated	no — design stage only

Source: boards/sensor-modules/axs-003-pir

Catalog #3 in the AruviX sensor line (../README.md), level L1 (GPIO). Socketed carrier (same pattern as AXS-046) for a 3.3 V mini PIR breakout of the AS312/AM312 class — the pyro element and its BISS0001-style controller stay on the plug-in board.

Status: schematic generated, ERC clean (0/0), netlist reviewed. PCB layout not started. Not released.

What it teaches#

A slow, self-timed digital input: the PIR holds OUT high for roughly two seconds per detection. Poll it, build level- vs edge-sensitive triggers, and time the hold-off in fabric.

Design#

J2 is a 1×03 pin socket assuming pin order VCC / OUT / GND (AS312/AM312 style). Check your breakout's pinout against the J2 silkscreen before plugging in — vendors vary.
Only 3.3 V mini PIR modules fit electrically; classic HC-SR501 boards want 5 V and are not supported.
Module-driven OUT passes a 100 Ω series resistor to PMOD pin 1 (PIR).
100 nF + 10 µF at the socket: pyroelectric front ends are sensitive to supply ripple.

PMOD pin	1	2	3	4	5	6	7	8	9	10	11	12
Net	PIR	NC	NC	NC	GND	3V3	NC	NC	NC	NC	GND	3V3

Regenerate#

python3 generate_design.py

Remaining for release#

[ ] PCB layout (20 × 25 mm outline), DRC, fab outputs
[ ] hdl/: motion-event latch + timeout counter, testbench, ECP5 demo
[ ] BOM export and availability check, design-review checklist