HardLabs

Electrical

engineering-with-ai·electrical-pcb·cad/cm4_carrier.kicad_pcb

Electrical PCB layout, top view — open source Raspberry Pi board by engineering-with-ai

About the Electrical PCB

Electrical is an open source Raspberry Pi PCB design by engineering-with-ai, published on GitHub. It is a 2-layer board measuring 100 × 80 mm, with 24 components from 17 distinct parts.

Its main chip is the CM4, from the Raspberry Pi family. Other key parts include the MAX3485 and CP2102N. By type, the board carries 8 capacitors, 7 connectors, 5 resistors, 2 ICs, 1 transistor and 1 fuse.

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

From the project

Electrical base template — validation gates, simulation harness, agent system prompt

CM4 carrier board — Raspberry Pi Compute Module 4 carrier for an outdoor self-contained sensor system with computer vision, thermal imaging, cellular uplink, and solar + battery power. 5V screw terminal input, polyfuse + reverse polarity protection, CP2102N USB-UART debug, MAX3485 RS-485, I2C/SPI/GPIO headers on 2.54mm pitch, 100x80mm 2-layer board.

Foundation board that exposes raw CM4 interfaces via headers. Downstream boards connect RGB camera (CSI), FLIR Lepton thermal sensor (SPI), cellular modem (RS-485 Modbus), and solar charge controller (I2C BMS telemetry).

Main components on the Electrical

MAX3485CP2102N

Electrical bill of materials (BOM)

24 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MAX3485
U1
1
CP2102N
U2
1
SI2301
Q1
1
5V_IN
J1
1
CM4
J2
1
RS485
J3
1
USB_DEBUG
J4
1
I2C
J5
1
SPI
J6
1
GPIO
J7
1
2A
F1
1
100UF
100uF
C1
1
10UF
10uF
C2
6
100NF
100nF
C3, C4, C5, C6, C7, C8
1
120
R1
2
560
R2, R3
2
2.2K
2.2k
R4, R5

Electrical design files

The KiCad project lives in the engineering-with-ai/electrical-pcb repository on GitHub; these links point at the commit this page was built from.

Electrical: common questions

What microcontroller does the Electrical use?

The Electrical is built around the CM4, from the Raspberry Pi family.

How big is the Electrical PCB?

The Electrical measures 100 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Electrical?

24 components, from 17 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 Electrical design files?

From the engineering-with-ai/electrical-pcb 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 Electrical design in my own project?

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

Can I test firmware for the Electrical without the hardware?

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

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