BitaxeFlux
About the BitaxeFlux PCB
BitaxeFlux is an open source ESP32 PCB design by Zayno, published on GitHub under the CERN-OHL-S-2.0 license. It is a 6-layer board measuring 190 × 120 mm, with 150 components from 49 distinct parts.
Its main chip is the ESP32-S3-WROOM-1-N16R8, from the ESP32 family. Other key parts include the SN74AXC4T774PWR, TPS546D24SRVFR, TPS62933DRLR, SX3M25.000E20F30THN and TLV77308PDBVR. By type, the board carries 96 capacitors, 29 resistors, 11 ICs, 6 inductors, 5 connectors and 2 switches.
From the project
An open source Bitcoin miner built around a single Bitmain BM1373, the 3 nm ASIC from the Antminer S23, on a board that takes an ordinary desktop CPU cooler. Bitaxe Flux follows the bitaxe design workflow and is derived from the Naja Duo (2 x BM1373, rev 1201) and the Bitaxe Gamm
An open source Bitcoin miner built around a single Bitmain BM1373, the 3 nm ASIC from the Antminer S23, on a board that takes an ordinary desktop CPU cooler. Bitaxe Flux follows the bitaxe design workflow and is derived from the Naja Duo (2 x BM1373, rev 1201) and the Bitaxe Gamma (1 x BM1370, rev 602).
Board revision 1401, KiCad 10.0 files, licensed CERN-OHL-S v2.
Main components on the BitaxeFlux
BitaxeFlux bill of materials (BOM)
150 components, 49 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SN74AXC4T774PWR SN74AXC4T774 | TSSOP-16_4.4x5mm_P0.65mm | U2 |
| 2 | TPS546D24SRVFR TPS546D24S | LQFN40-CLIP | U3, U7 |
| 2 | TPS62933DRLR | SOT-583-8_L2.1-W1.2-P0.50-LS1.6-BR | U4, U5 |
| 1 | ESP32-S3-WROOM-1-N16R8 | ESP32-S3-WROOM-1 | U6 |
| 1 | SX3M25.000E20F30THN 25MHz | SMD3225-4P | U8 |
| 1 | TLV77308PDBVR | SOT-23-5 | U10 |
| 1 | TLV77312PDBVR | SOT-23-5 | U11 |
| 1 | EMC2103-2-AP-TR | QFN-16-1EP_4x4mm_P0.65mm_EP2.1x2.1mm | U13 |
| 1 | AP2502KTR-G1 | SOT-23-6 | U16 |
| 1 | BM1373 | BM1340 | A1 |
| 1 | XT30PW-M | XT30PW-M | J1 |
| 1 | FPC-05FB-30PH20 LCD 30p FPC | FPC-SMD_30P-P0.50_XUNPU_FPC-05F-30PH20 | J2 |
| 1 | USB4105-GF-A USB-C | USB_C_Receptacle_GCT_USB4105-xx-A | J4 |
| 1 | 47053-1000 FAN 1 | 470531000 | J7 |
| 1 | 47053-1000 FAN 2 | 470531000 | J8 |
| 1 | CS1213AGF260 RESET | SW_CS1213AGF260_CRS | SW1 |
| 1 | CS1213AGF260 BOOT | SW_CS1213AGF260_CRS | SW2 |
| 2 | BLM31PG601SN1L 600R@100MHz | L_1206_3216Metric | FB1, FB2 |
| 2 | SLC1175-301MEC 300nH | SLC1175-271MEC_COC | L1, L4 |
| 2 | FTC201612S1R5MBCA 1.5uH | IND-SMD_L2.0-W1.6 | L2, L3 |
Show 29 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | GRM188R61E105KA12D 1uF | C_0603_1608Metric | C4, C27 |
| 2 | GRM155R71E472KA01D 4.7nF | C_0402_1005Metric | C5, C31 |
| 2 | GRM155R61H222KA01D 2.2nF | C_0402_1005Metric | C6, C32 |
| 17 | GRM155R71H104KE14D 0.1uF | C_0402_1005Metric | C7, C18, C22, C23, C33, C37, C39, C42 +9 |
| 12 | GRM188R61E106KA73D 10uF | C_0603_1608Metric | C8, C12, C41, C110, C111, C112, C113, C114 +4 |
| 2 | CC0805KRX7R9BB102 1nF | C_0805_2012Metric | C9, C46 |
| 12 | CL31A107MQHNNNE 100uF | C_1206_3216Metric | C10, C11, C13, C14, C15, C102, C105, C107 +4 |
| 25 | EMK105BJ105MV-F 1uF | C_0402_1005Metric | C16, C21, C44, C45, C48, C63, C64, C65 +17 |
| 2 | GRM188R61A475KE15D 4.7uF | C_0603_1608Metric | C19, C40 |
| 2 | CC0402KRX7R9BB333 33nF | C_0402_1005Metric | C29, C30 |
| 2 | CL21A226MPQNNNE 22uF | C_0805_2012Metric | C35, C36 |
| 9 | GRM188R60J106ME47D 10uF | C_0603_1608Metric | C38, C49, C54, C57, C58, C59, C60, C61 +1 |
| 3 | GRM1555C1H330JA01D 33pF | C_0402_1005Metric | C47, C100, C103 |
| 1 | GRM1555C1H471JA01D 470pF | C_0402_1005Metric | C93 |
| 1 | GRM1555C1H101JA01D 100pF | C_0402_1005Metric | C101 |
| 2 | UUD1E121MCL1GS 120uF | CP_Elec_6.3x5.9 | C104, C106 |
| 2 | RC0402FR-0749R9L 49.9R | R_0402_1005Metric | R1, R10 |
| 2 | ESR10EZPJ1R0 1R | R_0805_2012Metric | R2, R21 |
| 2 | RC0402FR-0710RL 10R | R_0402_1005Metric | R3, R19 |
| 11 | RC0402FR-0710KL 10k | R_0402_1005Metric | R5, R6, R13, R16, R20, R24, R30, R37 +3 |
| 1 | RC0402FR-0730K9L 30.9k | R_0402_1005Metric | R12 |
| 2 | RMCF0402JT5K10 5.1k | R_0402_1005Metric | R14, R25 |
| 1 | RC0402FR-0713K7L 13.7k | R_0402_1005Metric | R15 |
| 1 | RC0402FR-0752K3L 52.3k | R_0402_1005Metric | R17 |
| 1 | RC0402FR-0720KL 20k | R_0402_1005Metric | R23 |
| 2 | RC0402FR-071KL 1k | R_0402_1005Metric | R26, R38 |
| 1 | RC0402FR-075K6L 5.6k | R_0402_1005Metric | R31 |
| 2 | DNP | R_0402_1005Metric | R33, R35 |
| 1 | RC0402JR-074K7L 4.7k | R_0402_1005Metric | R39 |
BitaxeFlux design files
The KiCad project lives in the Zayno/BitaxeFlux repository on GitHub; these links point at the commit this page was built from.
BitaxeFlux: common questions
What microcontroller does the BitaxeFlux use?
The BitaxeFlux is built around the ESP32-S3-WROOM-1-N16R8, from the ESP32 family.
How big is the BitaxeFlux PCB?
The BitaxeFlux measures 190 × 120 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the BitaxeFlux?
150 components, from 49 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 BitaxeFlux design files?
From the Zayno/BitaxeFlux 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 BitaxeFlux design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which Zayno chose for the repository.
Can I test firmware for the BitaxeFlux 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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