HardLabs

Battery protection 09

matjutras·faultfinder·devices/battery_protection_09/battery_protection_09.kicad_pcb

Battery protection 09 PCB layout, top view — open source board by matjutras

About the Battery protection 09 PCB

Battery protection 09 is an open source PCB design by matjutras, published on GitHub. It is a 2-layer board measuring 90 × 40 mm, with 9 components from 8 distinct parts.

By type, the board carries 3 resistors, 1 connector, 1 battery holder, 1 fuse, 1 LED and 1 diode.

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

From the project

Educational electronics trainer: auto-generated schematics and 3D PCB views where you find an injected fault using a simulated multimeter, backed by real KiCad imports and ngspice simulation.

See CLAUDE.md for architecture and conventions.

Requires ngspice on PATH (sudo apt-get install ngspice) and kicad for kicad-cli (sudo apt-get install kicad).

map.json and faults.json under each devices//` are generated, not committed (see CLAUDE.md) — after a fresh checkout, regenerate them once per device:

Battery protection 09 bill of materials (BOM)

9 components, 8 distinct parts.

QtyPartRefs
1
BAT_OUT
J1
1
Li-Ion 3.7V
BT1
1
500mA PTC
F1
1
Green
LED1
1
1N5819
D1
1
100nF
C1
1
330
R1
2
100k
R2, R3

Battery protection 09 design files

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

Battery protection 09: common questions

How big is the Battery protection 09 PCB?

The Battery protection 09 measures 90 × 40 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Battery protection 09?

9 components, from 8 distinct parts. The full bill of materials is listed on this page.

Where can I download the Battery protection 09 design files?

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

Can I use the Battery protection 09 design in my own project?

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

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