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Led processor board

eelstretching·led-processor-board

Led processor board layout, top view — open source RP2040/RP2350 board by eelstretching

About the Led processor board

Led processor board is an open source RP2040/RP2350 PCB design by eelstretching, published on GitHub. It is a 2-layer board measuring 100 × 89.5 mm, with 123 components from 50 distinct parts.

Its main chip is the RP2350B, from the RP2040/RP2350 family. Other key parts include the NCP1117ST33T3G, W25Q128JVSIQ, APS6404L-3SQR-SN, RM2 and DS3231SN. By type, the board carries 55 resistors, 42 capacitors, 8 connectors, 7 ICs, 5 diodes and 2 switches.

It belongs with the power & battery designs in this gallery.

From the project

A board with a processor and a couple of other things that can talk to an LED output board.

The brains for the LED output boards: an RP2350B with an RM2 radio, 8 MB PSRAM, a DS3231 RTC and four 16-pin ribbon shrouds. Each shroud drives one led-output-board, which does the level shifting, fusing and strand connectors, so this board carries no LED power.

The core (RP2350B, flash, PSRAM, RM2, crystal, BOOTSEL/RUN buttons, 3.3 V regulator) is the rp2350b-rm2-reference schematic unchanged, except that its micro-B USB is now USB-C. That board's single-row J2/J3 headers are gone; the rest is new.

Led processor board, from the project README
From the project README

Main components on the Led processor board

RP2350BNCP1117ST33T3GW25Q128JVSIQAPS6404L-3SQR-SNRM2DS3231SNTPS54202HDDCR

Led processor board bill of materials (BOM)

123 components, 50 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2350B
U1
1
NCP1117ST33T3G
U2
1
W25Q128JVSIQ
U3
1
APS6404L-3SQR-SN
U4
1
RM2
U5
1
DS3231SN
U6
1
TPS54202HDDCR
TPS54202H
U7
1
ABM8-272-T3
12MHz
X1
1
TYPE-C-31-M-12
USB-C
J1
1
SPARE
J2
1
SWD
J3
1
DB301V-3.5-2P-GN-S
12V IN
J4
1
OUT1
J5
1
OUT2
J6
1
OUT3
J7
1
OUT4
J8
1
3001
CR1220
BT1
2
434133025816
SW1, SW2
2
19-217/GHC-YR1S2/3T
Green
D1, D5
2
B5819W
D2, D4
Show 30 more
QtyPartRefs
1
SS34
D3
1
AOTA-B201610S3R3-101-T
3.3u
L1
1
SWPA8040S150MT
15u
L2
3
CL21A106KAYNNNE
10u
C1, C5, C19
14
CL05B104KO5NNNC
100n
C2, C8, C10, C11, C12, C13, C14, C15 +6
2
0402CG150J500NT
15p
C3, C4
2
CL05A475MP5NRNC
4.7u
C6, C7
1
CL05A475MP5NRNC
4.7u
C9
1
CL21A106KAYNNNE
10u
C23
10
CL05B104KO5NNNC
100n
C24, C25, C36, C37, C38, C39, C40, C41 +2
1
CL05A105KA5NQNC
1u
C26
2
CL21A106KBYNNNE
10u
C27, C28
2
CC0603KRX7R9BB104
100n
C29, C30
1
0402CG750J500NT
75p
C31
3
CL21A226MAQNNNE
22u
C32, C33, C34
1
10k
R1
3
0402WGF1001TCE
1k
R2, R4, R6
1
0402WGF330JTCE
33
R3
2
0402WGF270JTCE
27
R7, R8
1
0
R9
2
0402WGF0000TCE
0
R10, R11
1
0402WGF1002TCE
10k
R13
1
0402WGF4700TCE
470
R14
4
0402WGF1002TCE
10k
R15, R17, R18, R19
2
0402WGF1001TCE
1k
R16, R23
1
0402WGF5103TCE
510k
R20
1
0402WGF1003TCE
100k
R21
1
0402WGF1332TCE
13.3k
R22
32
0402WGF330JTCE
33
R24, R25, R26, R27, R28, R29, R30, R31 +24
2
0402WGF5101TCE
5.1k
R56, R57

Led processor board design files

The KiCad project lives in the eelstretching/led-processor-board repository on GitHub; these links point at the commit this page was built from.

Led processor board: common questions

What microcontroller does the Led processor board use?

The Led processor board is built around the RP2350B, from the RP2040/RP2350 family.

How big is the Led processor board?

The Led processor board measures 100 × 89.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Led processor board?

123 components, from 50 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 Led processor board design files?

From the eelstretching/led-processor-board 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 Led processor board design in my own project?

The repository has no license, so all rights stay with eelstretching. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Led processor board 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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