HardLabs

Joulemeter

UCLA-Bruin-Supermileage·SMV_boards_2024-2025·edwin_joulemeter/Joulemeter.kicad_pcb

Joulemeter PCB layout, top view — open source RP2040/RP2350 board by UCLA-Bruin-Supermileage

About the Joulemeter PCB

Joulemeter is an open source RP2040/RP2350 PCB design by UCLA-Bruin-Supermileage, published on GitHub. It is a 2-layer board measuring 70.4 × 82.5 mm, with 39 components from 26 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the INA240A3PWR, MCP6286T-E/OT and PADS131M04QPWRQ1. By type, the board carries 15 capacitors, 11 resistors, 4 connectors, 3 ICs and 3 diodes.

Main components on the Joulemeter

INA240A3PWRMCP6286T-E/OTPADS131M04QPWRQ1

Joulemeter bill of materials (BOM)

39 components, 26 distinct parts.

QtyPartRefs
1
INA240A3PWR
U1
1
MCP6286T-E/OT
U3
1
PADS131M04QPWRQ1
U4
2
XT60-M
J1, J4
2
22035035
J2, J3
1
~
LDO1
1
~
REF35160QDBVR1
1
~
RP2
3
WL-SMCW_0603
D1, D2, D3
2
C0805C102K5GACTU
1uF,50V
C1, C4
1
0.1uF, 16V
C2
2
C0805C475K4RACTU
4.7nF,16V
C3, C6
1
10uF, 10V
C5
2
1uF,16V
C7, C9
1
1uF, 100V
C8
2
4.7uF, 100V
C10, C13
2
C0805C102K5GACTU
470uF, 63V
C11, C21
1
220nF, 6.3V
C12
1
C0805C104K5RACTU
0.1uF,50V
C15
1
500 kOHM, 0.26 W
R1
Show 6 more
QtyPartRefs
1
20kohms, 0.13W
R2
2
49.9ohm, 0.1W
R3, R4
1
0.0005ohm, 3W
R5
3
150ohm, 0.1W
R6, R7, R11
2
R_US
R8, R9
1
10kohms, 0.125W
R10

Joulemeter design files

The KiCad project lives in the UCLA-Bruin-Supermileage/SMV_boards_2024-2025 repository on GitHub; these links point at the commit this page was built from.

Joulemeter: common questions

What microcontroller does the Joulemeter use?

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

How big is the Joulemeter PCB?

The Joulemeter measures 70.4 × 82.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Joulemeter?

39 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the Joulemeter design files?

From the UCLA-Bruin-Supermileage/SMV_boards_2024-2025 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Joulemeter design in my own project?

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

Can I test firmware for the Joulemeter 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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Earlier revisions in the repo: joulemeter

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