BitAxe Ultra: 3rd Major Revision Based on BM1366 ASIC

“Bitaxe is a fully open source hardware Bitcoin ASIC miner. Ultra is the 3rd major revision of the bitaxe that now includes the BM1366 ASIC from the S19XP.””v1 hardware has been built, and it does mine! Quite well actually. Be sure to check the issues for known bugs, reworks and errata.””This is an advanced build! It’s also still early days, so prolly not the best thing if you’re just looking for a bitcoin miner to run.””The bitaxeUltra (BM1366, S19XP) has a slightly higher hashrate and better efficiency. Under the hood there are several improvements that make this a much more extensible ASIC to design with. But it does cost more than the bitaxeMax (BM1397, S17).

It’s safe to say the bitaxeUltra is working! Single BM1366 ASIC (from the S19XP) running at 527 GH/s and 20 J/TH. Open source everything.

Massive props to the Open Source Miners United crew for figuring this one out!

— skot (@skot9000) August 21, 2023


Standalone: can mine directly to your pool over WiFi. No External computer needed.Embedded: low cost, low maintenance, high availability, high reliability, low power.ASIC: based on the very, very efficient BM1366 from Bitmain.Versatile: solo/pool mining, autotune power/heat/efficiency.Open Source: All design files are provided.


ESP32-S3-WROOM-1 wifi microcontroller on boardTI TPS40305 buck regulator steps down the 5V input to power the BM1366Maxim DS4432U+ current DAC digitally adjusts the BM1366 core voltage from 0.04V to 2.4VTI INA260 power meter measures the input voltage and current of the minerMicrochip EMC2101 PWM controls the fan and monitors tach output. Measuring internal die temp isn’t working.0.91″ SSD1306 OLED I2C Display Module

GitHub Repo

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