BitaxeUltra
About the BitaxeUltra PCB
BitaxeUltra is an open source ESP32 PCB design by BennetLeff, published on GitHub under the Custom license license. It is a 4-layer board measuring 56.5 × 99.8 mm, with 86 components from 45 distinct parts.
Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the 25MHz, TXB0104RGYR, MCP1824T-1802E, MCP1824T-0802E and EMC2101. By type, the board carries 48 capacitors, 15 resistors, 11 ICs, 4 connectors, 3 transistors and 2 switches.
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 BitaxeUltra
BitaxeUltra bill of materials (BOM)
86 components, 45 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 25MHz | O 25,0-JO32-B-1V3-1-T1-LF | U1 |
| 1 | TXB0104RGYR | TXB0104 | U2 |
| 1 | MCP1824T-1802E | SOT-23-5 | U5 |
| 1 | MCP1824T-0802E | SOT-23-5 | U6 |
| 1 | EMC2101 | TSSOP-8_3x3mm_P0.65mm | U7 |
| 1 | INA260 | TSSOP-16_4.4x5mm_P0.65mm | U8 |
| 1 | TPS40305 | TPS40305 | U9 |
| 1 | DS4432U+ | TSSOP-8_3x3mm_P0.65mm | U10 |
| 1 | RT9080-33GJ5 | RT9080-33GJ5 | U11 |
| 1 | ESP32-S3-WROOM-1 | ESP32-S3-WROOM-1 | U12 |
| 1 | BM1366_mode1 | BM1366 | U14 |
| 2 | IKW40N120H3 CSD17311Q5 Infineon | CSD17311Q5 | Q1, Q2 |
| 1 | 2N7002K | SOT-323_SC-70 | Q4 |
| 1 | 32.768kHz | SC32S-7PF20PPM | Y1 |
| 1 | 54-00164 | BarrelJack_Wuerth_694106106102_2.0x5.5mm | J1 |
| 1 | Conn_01x02 | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2 |
| 1 | Conn_01x04 | 470531000 | J4 |
| 1 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J8 |
| 2 | GT-TC029B-H025-L1N | SW_CS1213AGF260_CRS | SW1, SW2 |
| 1 | SS310 | D_SMA | D1 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 150nH | FP1005R1-R15-R | L1 |
| 9 | 0.1uF | C_0402_1005Metric | C1, C7, C9, C19, C20, C29, C33, C42 +1 |
| 23 | 1uF | C_0402_1005Metric | C2, C3, C4, C5, C6, C8, C10, C11 +15 |
| 1 | 330uF | CP_EIA-7343-31_Kemet-D_Pad2.25x2.55mm_HandSolder | C13 |
| 1 | 220uF | CP_Elec_6.3x7.7 | C28 |
| 2 | 6.8pF | C_0402_1005Metric | C30, C31 |
| 3 | 47uF | C_1210_3225Metric | C34, C36, C37 |
| 1 | 1uF | C_0805_2012Metric | C38 |
| 1 | 3.3nF | C_0402_1005Metric | C39 |
| 1 | 180pF | C_0805_2012Metric | C40 |
| 1 | 1.5nF | C_0805_2012Metric | C41 |
| 2 | 10uF | C_0805_2012Metric | C43, C51 |
| 1 | 470pF | C_0805_2012Metric | C45 |
| 1 | 220uF | CAP_2R5TPE220MAFB | C46 |
| 1 | 100uF | C_1206_3216Metric | C47 |
| 5 | 10k | R_0402_1005Metric | R1, R4, R6, R7, R9 |
| 1 | 5.6k | R_0402_1005Metric | R2 |
| 2 | 5.1k | R_0402_1005Metric | R3, R5 |
| 1 | 1M | R_0402_1005Metric | R8 |
| 1 | 3.83k | R_0402_1005Metric | R10 |
| 1 | 4.12k | R_0402_1005Metric | R12 |
| 1 | 1.33k | R_0402_1005Metric | R13 |
| 1 | 4.99k | R_0402_1005Metric | R14 |
| 1 | 3.32k | R_0402_1005Metric | R15 |
| 1 | 80.6k | R_0402_1005Metric | R16 |
BitaxeUltra design files
The KiCad project lives in the BennetLeff/temper repository on GitHub; these links point at the commit this page was built from.
BitaxeUltra: common questions
What microcontroller does the BitaxeUltra use?
The BitaxeUltra is built around the ESP32-S3-WROOM-1, from the ESP32 family.
How big is the BitaxeUltra PCB?
The BitaxeUltra measures 56.5 × 99.8 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the BitaxeUltra?
86 components, from 45 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 BitaxeUltra 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 BitaxeUltra 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.
Can I test firmware for the BitaxeUltra without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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138.8 × 89.9 mm29 parts2LCustom license1
Temper fixture 33
100 × 150 mm13 parts4LCustom license1
Minimal board
50 × 30 mm4 parts2LCustom license1
Iso7741 gate drive fixture
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