Minimal board
About the Minimal board
Minimal board is an open source PCB design by BennetLeff, published on GitHub under the Custom license license. It is a 2-layer board measuring 50 × 30 mm, with 4 components from 4 distinct parts.
Other key parts include the LM358. By type, the board carries 2 resistors, 1 IC and 1 capacitor.
From the project
a breville control freak ++
Temper is a consumer induction cooker built around three pillars: an ESP32-S3 firmware with an 8-state transition-table machine handling real-time power control and hardware-latched protection circuits; a KiCad PCB design optimized through a custom CP-SAT-based signal-integrity and thermal-aware placer pipeline; and a Python/Rust placer toolchain (CP-SAT solver, geometry/DRC/DSN/IPC crates, workflow DAG) that automates layout and checks placement against IPC standards. Protection — over-current, over-voltage, thermal shutdown, UVLO — is designed to be hardware-latched with firmware monitoring.
Main components on the Minimal board
Minimal board bill of materials (BOM)
4 components, 4 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM358 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | 100nF | C_0603_1608Metric | C1 |
| 1 | 10k | R_0603_1608Metric | R1 |
| 1 | 4.7k | R_0603_1608Metric | R2 |
Minimal board design files
The KiCad project lives in the BennetLeff/temper repository on GitHub; these links point at the commit this page was built from.
Minimal board: common questions
How big is the Minimal board?
The Minimal board measures 50 × 30 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Minimal board?
4 components, from 4 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 Minimal board design files?
From the BennetLeff/temper repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Minimal board design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
More boards in temper
ESP32Temper
164 × 234 mm164 parts6LCustom license1
ESP32BitaxeUltra
56.5 × 99.8 mm86 parts4LCustom license1
EXP02E BGA Escape input
12 × 12 mm60 parts2LCustom license1
RP2040/RP2350RP2040-Guide
45.2 × 93.4 mm31 parts2LCustom license1
RP2040/RP2350Keyboard
138.8 × 89.9 mm29 parts2LCustom license1
Temper fixture 33
100 × 150 mm13 parts4LCustom license1
Iso7741 gate drive fixture
100 × 80 mm4 parts2LCustom license1