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README

Warning: the bitaxeHex is unfinished. there may be hardware and firmware bugs. Please see The bitaxeHex channel on the OSMU Discord for the latest status

Closed Source is Antithetical to Bitcoin

Presenting: The bitaxeHex

bitaxeHex is a follow on to the bitaxe that incorporates six BM1366 ASICs from the Antminer 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 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 TPS546D24ARVFR buck regulator steps down the 12V input to power the chain of BM1366
TMP1075 measures inlet and outlet PCB temperature.
Microchip EMC2302 Controls dual fans
Header for optional status LCD

BM1366

The BM1366 is a undocumented SHA256 mining ASIC from Bitmain. It's mostly used in the Antminer S19XP and S19K Pro
Bitmain claims the BM1366 has 21.5 W/TH efficiency
The BM1366 is available (new) for around $15 each.

Current Status

v304 is the latest revision but it has a known problem with the Vcore regulator. There is a workaround, see the bottom of this readme.
Power draw is around 50W @12V.
ESP32 miner firmware will configure the power supply to run at the proper voltage.
This is an advanced build! If you don't have experience building boards, you should probably go build a single ASIC bitaxe first to get the technique down.

Notes

Beware that overclocking doesn't produce a higher hash rate on this board, it only causes more heat generation.

Comments

Presenting: The bitaxeHex

bitaxeHex is a follow on to the bitaxe that incorporates six BM1366 ASICs from the Antminer 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 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 TPS546D24ARVFR buck regulator steps down the 12V input to power the chain of BM1366

TMP1075 measures inlet and outlet PCB temperature.

Microchip EMC2302 Controls dual fans

Header for optional status LCD

BM1366

The BM1366 is a undocumented SHA256 mining ASIC from Bitmain. It's mostly used in the Antminer S19XP and S19K Pro

Bitmain claims the BM1366 has 21.5 W/TH efficiency

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

Current Status

v304 is the latest revision but it has a known problem with the Vcore regulator. There is a workaround, see the bottom of this readme.

Power draw is around 50W @12V.

ESP32 miner firmware will configure the power supply to run at the proper voltage.

This is an advanced build! If you don't have experience building boards, you should probably go build a single ASIC bitaxe first to get the technique down.

Notes

Beware that overclocking doesn't produce a higher hash rate on this board, it only causes more heat generation.

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Presenting: The bitaxeHex

Goals

Features

BM1366

Current Status

Notes

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Presenting: The bitaxeHex

Goals

Features

BM1366

Current Status

Notes

Revision List

Hardware

Software

Power Supply Requirements

Building

V304 Modification