Assembling Freedom #23
From POD256 ep111: Open-Source Overdrive: Mujina Breakthroughs, Public Pool’s First Block, and LibreBoard v3
April 8, 2026 | Hosted by @econoalchemist, @skot9000, and @tylerkstevens
Tech enthusiasts, this episode is pure open-source Bitcoin mining catnip. The crew dives headfirst into the “nerd-sniped” joy of rapid hardware iteration, celebrates a massive week for solo miners (4 blocks in a week!), and drops roadmaps for Mujina firmware, HydraPool, and LibreBoard v3. Everything is GPL/CERN-OHL licensed, community-driven, and aimed at making mining more hackable, transparent, and fun. No proprietary black boxes here—just Rust-powered firmware, custom PCBs, and real blocks hitting public pools.
1. Hardware Hacks: From $20 USB Miner Concepts to Fan Control Boards
The episode opens with the classic open-source trap: one idea leads to another. Hosts sketch the Bitaxe Latte—a jokey but plausible ultra-low-cost USB Bitcoin miner concept (~$20 BOM) that could democratize entry-level solo mining even further. They also unveil a tiny custom adapter board for AC Infinity duct fans, letting miners control high-CFM, low-noise fans via standard 4-pin PWM headers on hashboards.
Key Technical Breakdown:
Bitaxe Latte concept: Builds on existing Bitaxe ecosystem (BM1366/BM1370 chips). Focus on minimalism: USB-powered, open KiCad files, plug-and-play for hobbyists.
AC Infinity adapter: Solves noisy stock fans. Uses 4-pin header for PWM speed control + RPM feedback. Pairs perfectly with Ember One or similar open boards.
Why it matters: Open hardware accelerates iteration—community forks and PRs ship faster than closed-source vendors.
(Bitaxe hardware examples—imagine the Latte as an even smaller USB variant.)
(Mining setups with AC Infinity-style fan integration and adapter examples.)
2. Firmware Deep Dive: Mujina Breakthroughs & Open Collaboration
Mujina (Rust-based, async mining software from 256 Foundation) steals the show. It’s a modern, multi-chip driver firmware running on Debian-based OS, targeting Bitmain, Whatsminer, Avalon, and more. Recent wins include PWM frequency tweaks for better fan control and RPM reporting workarounds.
In-Depth Bullet Breakdown:
PWM frequency tweaks: Higher/lower frequencies reduce coil whine or improve fan response on hashboards.
RPM reporting hack: Custom logic in Mujina bridges missing sensor data—critical for monitoring and auto-tuning.
Universal Bitmain-chip driver roadmap (April): One driver to rule them all. Community forks already appearing (e.g., BCB100 support).
AxeOS protections: Coinbase verification prevents pool attacks; GPL alignment ensures transparency.
Collaboration superpowers: Open-source stack (firmware + hardware + pool) means PRs ship in days, not quarters.
Mujina vs. Closed Firmware Comparison Table:
(Firmware dashboard example—visualizing real-time tuning, hashrate, and temps like Mujina/PrismOS-style interfaces.)
3. Solo Mining Explosion: Public Pool’s First Block + 4 Blocks in Days
A banner week for the little guy. Solo miners (using open pools and hardware) found 4 blocks recently—proof that probability + open tools = life-changing wins without KYC or custodial drama.
Blocks Breakdown (as of episode):
CKPool ×2 (old Antminers, 230 TH/s and 70 TH/s)
Public Pool’s first hosted-instance block (~18.5 TH/s NerdQaxe)
Node Runners pool (~4.8 TH/s NerdQaxe++)
Pool Mechanics Spotlight:
Public Pool: Fully open-source, no fees, stratum+tcp://public-pool.io:21496 (username = BTC address.worker).
Coinbase verification in AxeOS/Mujina protects against malicious pools.
Odds example: One 18.5 TH/s miner beat 1-in-28,000 daily odds for a full block.
Solo Mining Wins Table:
(Public Pool branding and live dashboard—transparent, open-source solo mining.)
(Block-found celebration visuals—pure open-source mining joy.)
4. April Roadmaps & LibreBoard v3 Power Design
HydraPool: Password-field difficulty/hashrate hints + improved logging for better UX.
Mujina: Push to universal Bitmain driver.
LibreBoard v3: Power delivery upgrades for Ember One hashboards (~100W, 2-4 TH/s per board). Fully open CERN-OHL-S, versatile I/O, compute module options.
(Ember One / LibreBoard-style open hashboards and control boards.)
Additional shop talk: Stencil printer & solder paste tips, Ember One v6.1 reliability, ASIC RS community growth, Telehash/Austin plans, and upcoming events (Vegas + Bitcoin Park Nashville).
5. Related X Buzz from the Community
The open-source mining wave is real—here’s what’s lighting up X right now:
@skot9000 (Bitaxe instigator): “Make no mistake, what you are looking at here is the future of Bitcoin mining firmware; Mujina. Versatile, customizable, open source freedom.” (quoting a BCB100 Mujina fork).
@econoalchemist: Highlighted the same Mujina fork: “Someone forked Mujina & got it to work on the BCB100. Open-source Bitcoin mining firmware FTW.”
@mining_central: “This week #Bitcoin paid out 4 times to solo miners! … Public Pool - (~18.5 TH/s, NerdQaxe) … The network doesn’t care how big you are.”
@solo_mining: Celebrated “The first Public Pool Bitcoin Block was (finally) found. 🥳 Congrats … Open Source wins!”
Final Call to Action
Tune in at pod256.org. Dive into the repos: Mujina on GitHub, LibreBoard, Public Pool docs. Build, fork, mine—Bitcoin’s hashrate gets freer one open PR at a time.
Stay hashin’! ⛏️
Generated from POD256 Episode 111 for tech enthusiasts.
This work published under the CC0 1.0 license