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Project ATO / Contact Router

pratham-cloud-ctrl·Project-ATO·electronics/stage4/integrated-pcb/boards/contact-router/contact_router.kicad_pcb

Project ATO / Contact Router PCB layout, top view — open source board by pratham-cloud-ctrl

About the Project ATO / Contact Router PCB

Project ATO / Contact Router is an open source PCB design by pratham-cloud-ctrl, published on GitHub under the Custom license license. It is a 4-layer board measuring 175 × 155 mm, with 155 components from 22 distinct parts.

Other key parts include the SN74LVC595APWR, SN74LVC157APWR, SN74LVC1G74DCUR, TMUX6208PWR and SN74LVC1G11DBVR. By type, the board carries 60 capacitors, 56 ICs, 30 resistors and 9 connectors.

From the project

A digital spinal cord-computer interface concept: research, eight KiCad boards, nRF5340 firmware and FreeCAD assemblies.

Complete within the bounded digital reference scope — 16 October 2026. All eight genuinely routed native boards pass DRC with zero violations, unconnected items, schematic parity issues or ignored checks. The independent pad/net audit passes 14,273 assertions. The 80-sheet master passes ERC and 9,540 independent electrical-integration assertions.

Start with the board index and explicit launchers. The Stage 4 exit review records what this package establishes and the remaining physical and biological evidence limits.

Main components on the Project ATO / Contact Router

SN74LVC595APWRSN74LVC157APWRSN74LVC1G74DCURTMUX6208PWRSN74LVC1G11DBVRSN74LVC1G08DBVRSN74LVC1G32DBVRSN74LVC1G04DBVRSN74LVC1G86DBVR

Project ATO / Contact Router bill of materials (BOM)

155 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN74LVC595APWR
U40010
2
SN74LVC157APWR
U40020, U40021
11
SN74LVC1G74DCUR
U40030, U40031, U40032, U40033, U40034, U40035, U40036, U40037 +3
4
TMUX6208PWR
U40100, U40101, U40200, U40201
8
SN74LVC1G11DBVR
U40300, U40301, U40309, U40310, U40313, U40317, U40319, U40408
11
SN74LVC1G08DBVR
U40302, U40315, U40320, U40409, U40411, U40412, U40413, U40414 +3
7
SN74LVC1G32DBVR
U40303, U40305, U40306, U40307, U40404, U40405, U40406
8
SN74LVC1G04DBVR
U40304, U40308, U40311, U40312, U40321, U40407, U40410, U40415
4
SN74LVC1G86DBVR
U40400, U40401, U40402, U40403
1
QUALIFIED EXTERNAL RAILS
J40001
1
CANDIDATE PRELOAD AND COMMIT
J40002
1
SOURCE ROUTE INTENT / PHASE STATUS
J40003
1
EXTERNAL OBSERVED HEALTH CONTRACTS
J40004
1
COMMAND STATUS / NOT MUX READBACK
J40005
1
ACTIVE ADDRESS BIT READBACK
J40006
1
SIXTEEN CONTACTS / TWO MONITORED RETURNS
J40007
2
DRIVER A / MONITORED RETURN
J40100, J40200
52
100n X7R 10V
C40010, C40020, C40021, C40030, C40031, C40032, C40033, C40034 +44
4
100n X7R 50V
C40100, C40101, C40200, C40201
4
1u X7R 50V
C40102, C40103, C40202, C40203
Show 2 more
QtyPartRefs
20
10k
R40010, R40011, R40012, R40013, R40014, R40300, R40301, R40302 +12
10
22k
R40100, R40101, R40102, R40103, R40104, R40200, R40201, R40202 +2

Project ATO / Contact Router design files

The KiCad project lives in the pratham-cloud-ctrl/Project-ATO repository on GitHub; these links point at the commit this page was built from.

Project ATO / Contact Router: common questions

How big is the Project ATO / Contact Router PCB?

The Project ATO / Contact Router measures 175 × 155 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Project ATO / Contact Router?

155 components, from 22 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Project ATO / Contact Router design files?

From the pratham-cloud-ctrl/Project-ATO repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Project ATO / Contact Router design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

More boards in Project-ATO