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NEMESIS

svdrecbd·NEMESIS·firmware/unit1/UNIT1_firmware/hardware/kicad/UNIT1_R1/UNIT1_R1.kicad_pcb

NEMESIS PCB layout, top view — open source RP2040/RP2350 board by svdrecbd

About the NEMESIS PCB

NEMESIS is an open source RP2040/RP2350 PCB design by svdrecbd, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 97 × 55 mm, with 68 components from 40 distinct parts.

Its main chip is the RP2350A, from the RP2040/RP2350 family. Other key parts include the NCP1117ST33T3G, W25Q128JVSIQ, AP63205WU-7 and DRV8461SPWPR. By type, the board carries 32 capacitors, 16 resistors, 5 ICs, 4 connectors, 4 diodes and 2 switches.

It belongs with the robotics & motion designs in this gallery.

From the project

NEMESIS (Non-periodic Event Monitoring & Evaluation of Stimulus-Induced States). A desktop app for Stentor habituation: live USB-microscope preview, Arduino stepper taps (Periodic/Poisson, seedable), independent MP4 recording, CSV v1.0 logging + run.json, and plotting for fast, reproducible analysis.

This directory contains the first electrically connected UNIT1 board design. It is a real KiCad hierarchy, not a wiring sketch. The RP2350A core comes from Raspberry Pi's official minimal reference; the second sheet adds the protected 12 V input, 5 V supply, DRV8461 motor stage, safe boot defaults, and the motor connector used by the firmware.

Status: R1-LAYOUT physical-design checkpoint; not released for fabrication. The PCB now has the full UNIT1 outline, mounting holes, barrel input, USB, RP2350A core, protected power stage, DRV8461, right-angle motor header, four copper layers…

Main components on the NEMESIS

RP2350ANCP1117ST33T3GW25Q128JVSIQAP63205WU-7DRV8461SPWPR

NEMESIS bill of materials (BOM)

68 components, 40 distinct parts.

QtyPartRefs
1
RP2350A
U1
1
NCP1117ST33T3G
U2
1
W25Q128JVSIQ
U3
1
AP63205WU-7
U10
1
DRV8461SPWPR
U11
1
IRF4905S
Q10
1
12MHz
X1
1
10103594-0001LF
J1
1
SM03B-SRSS-TB(LF)(SN)
J4
1
694103107102
WURTH 694103107102 — VERIFY FIT
J10
1
MOTOR — MALE DUPONT
J11
1
2.5 A TIME-LAG
F10
2
434133025816
SW1, SW2
1
12 V VGS CLAMP
D10
1
SMBJ18CA
D11
1
SS14 USB OR
D20
1
SS14 BUCK OR
D21
1
3.3u
L1
1
4.7u >=2.7A
L20
3
10u
C1, C5, C19
Show 20 more
QtyPartRefs
11
100n
C2, C8, C10, C11, C12, C13, C14, C15 +3
2
15p
C3, C4
2
4.7u
C6, C7
1
4.7u
C9
1
470u 35V
C20
2
100n 50V
C21, C41
1
10u 35V
C30
2
100n
C31, C43
2
22u 10V
C32, C33
1
1u 16V
C40
1
1u 10V
C42
2
10n 50V
C44, C45
1
100u 35V
C46
1
10k
R1
3
1k
R2, R4, R6
1
33
R3
2
27
R7, R8
2
0
R9, R10
1
100k
R20
6
10k
R30, R31, R32, R33, R34, R35

NEMESIS design files

The KiCad project lives in the svdrecbd/NEMESIS repository on GitHub; these links point at the commit this page was built from.

NEMESIS: common questions

What microcontroller does the NEMESIS use?

The NEMESIS is built around the RP2350A, from the RP2040/RP2350 family.

How big is the NEMESIS PCB?

The NEMESIS measures 97 × 55 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the NEMESIS?

68 components, from 40 distinct parts. The full bill of materials is listed on this page.

Where can I download the NEMESIS design files?

From the svdrecbd/NEMESIS repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the NEMESIS design in my own project?

Yes, under the terms of its Apache-2.0 license, which svdrecbd chose for the repository.

Can I test firmware for the NEMESIS without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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