Sensor modules

AXS-002 — Hall-effect + reed switch PMOD module

Catalog #2 in the AruviX sensor line, level L1 (GPIO). Two magnetic detectors on one module: a Diodes AH1806 omnipolar hall-effect switch and a Coto CT10-1540-G4 reed switch, so the same magnet trips a clean solid-state edge and a bouncy mechanical contact.

Level L1 ERC clean DRC clean Fab package 8 components

3D render of the AXS-002 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	AH1806 supply decoupling	`GRM188R71C104KA01D` Murata	`C_0603_1608Metric`
`J1`	PMOD PLUG 2x6	PMOD peripheral plug (Digilent spec 1.2)	not selected generic	`PinHeader_2x06_P2.54mm_Horizontal`
`R1`	10k	Pull-up for the AH1806 open-drain output	`RC0603FR-0710KL` Yageo Datasheet ↗	`R_0603_1608Metric`
`R2`	100R	Series protection on the module-driven HALL line	`RC0603FR-07100RL` Yageo Datasheet ↗	`R_0603_1608Metric`
`R3`	10k	Pull-up for the reed contact	`RC0603FR-0710KL` Yageo Datasheet ↗	`R_0603_1608Metric`
`R4`	100R	Series protection on the module-driven REED line	`RC0603FR-07100RL` Yageo Datasheet ↗	`R_0603_1608Metric`
`SW1`	CT10-1540-G4	SPST-NO reed switch, 10-15 AT sensitivity, SMD	`CT10-1540-G4` Coto Technology Datasheet ↗	`SW_SPST_REED_CT10-XXXX-G4`
`U1`	AH1806-W	Omnipolar hall-effect switch, 2.5-5.5 V, open-drain output	`AH1806-W-7` Diodes Incorporated Datasheet ↗	`SC-59`

Signals#

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

3V3 GND HALL HALL_OUT REED REED_SENSE

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-002-hall-reed

Catalog #2 in the AruviX sensor line (../README.md), level L1 (GPIO). Two magnetic detectors on one module: a Diodes AH1806 omnipolar hall-effect switch and a Coto CT10-1540-G4 reed switch, so the same magnet trips a clean solid-state edge and a bouncy mechanical contact.

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

What it teaches#

Reading GPIO inputs, and the contrast between a debounce-free solid-state sensor (HALL) and a chattering mechanical contact (REED) — wave a magnet, scope both lines, then write the debouncer the reed switch needs.

Design#

AH1806-W (SC-59), 2.5–5.5 V omnipolar hall switch; open-drain output with a 10 kΩ pull-up, active low near a magnet. 100 nF decoupling at the part.
CT10-1540-G4 SMD reed switch: one side GND, the other pulled to 3V3 through 10 kΩ; closes (goes low) in a magnetic field, and bounces.
Both module-driven lines pass 100 Ω series resistors per line rules.

PMOD pin	1	2	3	4	5	6	7	8	9	10	11	12
Net	HALL	REED	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/: edge detector + debouncer, testbench, ECP5 demo
[ ] BOM export and availability check, design-review checklist