4 layers50 × 50 mm Selector eval module, the printed circuit board in 3D

Selector eval module

The official repository of the Cerybra Biocomputer.

Size: 50 × 50 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 32
Nets: 27
Pads: 114
Tracks, vias: 223, 7
Pours: 4
Routed: Yes
KiCad: KiCad 7 (file 20221018)
Created: 20 May 2026
Updated: 7 Aug 2026

Overview

Selector eval module is an open-source printed circuit board by Cerybra, from the Cerybra/physarum-biocomputer repository on GitHub, published under the AGPL-3.0 licence. It is a 4-layer board of 50 × 50 mm with 32 parts on 27 nets, routed with 223 tracks and 7 vias.

It is built around the MAX14662ETI+T. Its parts include 4 connectors, 2 capacitors and 1 IC.

Main components

MAX14662ETI+T
TQFN-28-EP(4x4)-40℃~+85℃ 1.6V~5.5V 1:1 400MHz 425mΩ 5.5us 5.5us 8 80ns TQFN-28-EP(4x4) Analog Switches, Multiplexers ROHSMaxim Integrated (Analog Devices)Analog Switches, Multiplexers

README

README.md

Physarum Biocomputer

Project Structure

Descriptions

The project structure is organized as follows:

📂 adaptors: contains all of the hardware files for the various adaptors that are compatible with the biocomputer carrier board.
📂 data: contains all of the experimentally collected data.
📂 devices: contains all of the hardware files for both the open-air and enclosure-type devices.
📂 modules: contains all of the hardware files for each of the biocomputer modules.
📂 software: contains all of the software used in performing experiments.
📂 simulations: contains all of the code used in performing equivalent circuit simulations.
📂 plots: contains all of the code used in producing the main figures.

Structure

📂 repository

📂 data
- 📂 device-pulse-recordings
- 📂 device-regression-recordings
- 📂 device-sweep-recordings
- 📂 eis-recordings
- 📂 noise-recordings
- 📂 reservoir-computing-recordings
📂 modules
- 📂 biocomputer-eval-motherboard
- 📂 dac-eval-module
- 📂 daq-eval-board
- 📂 dual-rail-power-eval-module
- 📂 selector-eval-module
📂 adaptors
- 📂 1x1-adaptor
- 📂 4x1-adaptor
- 📂 8x1-adaptor
- 📂 card-half
- 📂 card-full
- 📂 configurable-adaptor
- 📂 standard-adaptor
📂 software
- 📂 examples
📂 devices
- 📂 enclosures
- 📂 pluggable
📂 simulations
📂 plots

Reproducibility

To reproduce all of the main figures, either clone the repository or download the data directory. Then, run each of the scripts within the plots/main directory.

Parts

Qty	Value	Footprint	References
16	TestPoint	CRYBA_MAX14662_Eval:KEYSTONE_5002	TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP14, TP15, TP16
4	MountingHole_Pad	MountingHole:MountingHole_2.7mm_Pad_Via	H1, H2, H3, H4
2	100nF	Capacitor_SMD:C_0402_1005Metric	C1, C2
2	Conn_01x04	Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical	J3, J4
2	Conn_01x08	Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical	J1, J2
2	LOGO	LOGO	G*, G*
1	Jumper_3_Bridged12	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	JP1
1	MAX14662ETI+T	CRYBA_MAX14662_Eval:TQFN-28-EP1_4.00x4.00mm_P5.0mm	U1
1	TestPoint	CRYBA_MAX14662_Eval:KEYSTONE_5006	TP19
1	TestPoint	CRYBA_MAX14662_Eval:KEYSTONE_5000	TP18

Questions

How big is the Selector eval module PCB?

It measures 50 × 50 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Selector eval module use?

32 parts, built around the MAX14662ETI+T. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Selector eval module KiCad files?

From the Cerybra/physarum-biocomputer repository on GitHub, at the commit this page was made from: the board is modules/selector-eval-module/selector-eval-module.kicad_pcb and its schematic adaptors/1x1-adaptor/1x1-adaptor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Selector eval module design in my own project?

Its repository publishes it under the AGPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/cerybra-physarum-biocomputer-selector-eval-module" title="Selector eval module in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/cerybra-physarum-biocomputer-selector-eval-module.jpg" alt="Selector eval module" width="1200" height="900">

A picture that opens the board, for a README

[![Selector eval module](https://pcbkit.io/embed/boards/cerybra-physarum-biocomputer-selector-eval-module.jpg?size=s)](https://pcbkit.io/boards/cerybra-physarum-biocomputer-selector-eval-module)

Source

Repository: Cerybra/physarum-biocomputer
Board file: modules/selector-eval-module/selector-eval-module.kicad_pcb
Commit: 2abf93e
Licence: AGPL-3.0

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