bitaxe

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README

Bitaxe hardware repository has split into model specific repos and moved to bitaxeorg

Open Source is Intrinsic to Bitcoin

The bitaxeUltra

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

Goals

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.

Features

ESP32-S3-WROOM-1 wifi microcontroller on board
TI TPS40305 buck regulator steps down the 5V input to power the BM1366
Maxim DS4432U+ current DAC digitally adjusts the BM1366 core voltage from 0.04V to 2.4V
TI INA260 power meter measures the input voltage and current of the miner
Microchip EMC2101 PWM controls the fan and monitors tach output. BM1366 doesn't support die temp, but we have it placed super close to the ASIC so we can use the internal temp feature.
0.91" SSD1306 OLED I2C Display Module

BM1366

The BM1366 is a undocumented SHA256 mining ASIC from Bitmain. It's used in the Antminer S19XP and the S19k Pro
Bitmain claims the BM1366 has 0.021J/GH efficiency
The BM1366 is available (new) for around $15 each in small quantities.
The BM1366 has a different footprint and pinout from the BM1397 and BM1387 in previous bitaxe.
The BM1366 appears to roll more than just the nonce on the chip. This is great news, because it allows much longer serial chains of ASICs and new work doesn't need to be sent as often.

Current Status

Comments

The bitaxeUltra

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

Goals

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.

Features

ESP32-S3-WROOM-1 wifi microcontroller on board

TI TPS40305 buck regulator steps down the 5V input to power the BM1366

Maxim DS4432U+ current DAC digitally adjusts the BM1366 core voltage from 0.04V to 2.4V

TI INA260 power meter measures the input voltage and current of the miner

Microchip EMC2101 PWM controls the fan and monitors tach output. BM1366 doesn't support die temp, but we have it placed super close to the ASIC so we can use the internal temp feature.

0.91" SSD1306 OLED I2C Display Module

BM1366

The BM1366 is a undocumented SHA256 mining ASIC from Bitmain. It's used in the Antminer S19XP and the S19k Pro

Bitmain claims the BM1366 has 0.021J/GH efficiency

The BM1366 is available (new) for around $15 each in small quantities.

The BM1366 has a different footprint and pinout from the BM1397 and BM1387 in previous bitaxe.

The BM1366 appears to roll more than just the nonce on the chip. This is great news, because it allows much longer serial chains of ASICs and new work doesn't need to be sent as often.

Current Status

bitaxe

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Bitaxe hardware repository has split into model specific repos and moved to bitaxeorg

The bitaxeUltra

Goals

Features

BM1366

Current Status

Contact us

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Bitaxe hardware repository has split into model specific repos and moved to bitaxeorg

The bitaxeUltra

Goals

Features

BM1366

Current Status

Hardware

Software

Cooling

Power Supply Requirements

ESP32 Programming Requirements

Building