HardLabs

LitterWatch

bluetiger9·LitterWatch·KiCad/LitterWatch.kicad_pcb

LitterWatch PCB layout, top view — open source RP2040/RP2350 board by bluetiger9

About the LitterWatch PCB

LitterWatch is an open source RP2040/RP2350 PCB design by bluetiger9, published on GitHub. It is a 4-layer board measuring 142 × 102 mm, with 76 components from 41 distinct parts.

Its main chip is the RP2350_60QFN, from the RP2040/RP2350 family. Other key parts include the NCP1117-3.3_SOT223, W25Q128JVS, TPS61022, RY220x and MCP73831-2. By type, the board carries 29 capacitors, 17 resistors, 11 connectors, 7 ICs, 3 battery holders and 3 diodes.

From the project

LitterWatch - Combating Littering with Edge AI

Main components on the LitterWatch

RP2350_60QFNNCP1117-3.3_SOT223W25Q128JVSTPS61022RY220xMCP73831-2RT9742GGJ5

LitterWatch bill of materials (BOM)

76 components, 41 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2350_60QFN
U1
1
NCP1117-3.3_SOT223
U2
1
W25Q128JVS
U3
1
TPS61022
U4
1
RY220x
U5
1
MCP73831-2
U6
1
RT9742GGJ5
U7
1
ABM8-272-T3
Y1
1
USB3_A
J1
1
Conn_02x03_Odd_Even
J2
1
SENSOR 1
J3
1
SENSOR 2
J4
1
Conn_01x22_Female
J5
1
COM MODULE
J6
1
Micro_SD_Card_Det
J7
1
Conn_02x05_Odd_Even
J9
1
USB_C_Receptacle_USB2.0
J11
1
JST_SHBM04B-SRSS-TB
J14
1
Solar IN
J15
1
Battery_Cell
BT1
Show 21 more
QtyPartRefs
2
18650
BT2, BT3
1
ComputeModule5-CM5
Module1
1
SW_Push
SW1
1
PICO_RESET
SW2
3
LED Green
D1, D2, D3
1
3.3u
L1
1
1uH (WE 744316100)
L2
10
10u
C1, C2, C5, C7, C23, C24, C25, C26 +2
2
15p
C3, C4
13
100n
C6, C11, C14, C15, C16, C17, C18, C19 +5
4
4.7u
C8, C10, C12, C13
4
1k
R1, R3, R4, R10
1
DNF
R2
1
33
R6
4
10k
R7, R11, R15, R16
1
732k
R8
1
100k
R12
1
10K (DNP)
R13
1
0
R14
2
1k
R17, R19
1
7k
R18

LitterWatch design files

The KiCad project lives in the bluetiger9/LitterWatch repository on GitHub; these links point at the commit this page was built from.

LitterWatch: common questions

What microcontroller does the LitterWatch use?

The LitterWatch is built around the RP2350_60QFN, from the RP2040/RP2350 family.

How big is the LitterWatch PCB?

The LitterWatch measures 142 × 102 mm, has 4 copper layers and is 2.2896 mm thick.

How many components are on the LitterWatch?

76 components, from 41 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 LitterWatch design files?

From the bluetiger9/LitterWatch 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 LitterWatch design in my own project?

The repository has no license, so all rights stay with bluetiger9. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the LitterWatch 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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