100% verifiable code yes. It's already available. Hardware is another story because there are VERY few Foundries in the world that are capable of making decent speed CPU's and at least one of them will be making the actual chips (and support chips).

That means the Foundries must be trusted to not fiddle with the chip designs and put in backdoors at the request of governments. So far, that is NOT an issue with Intel (edit: being a separate stand-alone bit of logic on the same dies as the CPU, ME *can/is* one but can also be disabled), TSMC, Samsung and Global. btw: that is the whole point about the US and EU blocking/restricting Huawei and other China-owned makers of network and other communications gear being sold/used in their jurisdictions - the chips and gear are pretty much wholly produced in China so major concerns about backdoors there.

edit: found that Intel's ME *can* be disabled. More explicit description courtesy of bleeping computer is here.

Since you are so against Intel's ME, just use a PC based on the ARM or AMD or other non-Intel CPU's... Problem sort of solved.

Only catch is that the CPU's require compilers to translate the OS code into the CPU-specific microcode which is doing the actual data manipulations in a CPU. Those compilers are based on code libraries that come from the CPU makers. So... in many ways there is still proprietary closed-source code being ran.

That said, yes there *are* "Open Source" CPU architectures out there. A quick article about is here. Also just do a search for "open source CPU" to find a lot more about it.

Only 1 problem with that -- considering that miners get paid for processing blocks, changing the algo to make it 'CPU friendly' would mean that gazillions more miners would be cheaply brought online and difficulty would still skyrocket as a way to keep to the existing rewards schedule. If the algo is changed to keep diff low the network could easily be swamped with miners vying to get the finder reward or more likely and worse yet, bad actors easily DOSing the pools/nodes or applying 51% attacks..

The existing POW format prevents all of that by making it exceeding difficult & expensive to attack the network..

Have you contacted the distributor or Canaan?
What is the line voltage feeding the miner? It must be between 208 -240VAC.
The Avalons are very easy to work on and odds are that if a replacement part is needed it will be sent for you to replace vs sending the miner in for warranty repair.

The main things to keep in mind is that:
a) for all intents and purposes the spaces between the sound baffles are air ducts and air flow through them must be calculated. Those 90-deg bends will introduce considerable resistance to the airflow so include that.

b) remember that you are calculating the airflow rate as in CFM or M³/min. The air velocity should be kept very low as velocity is what drastically increases airflow resistance through ducts and around corners.

There should be scads of calculators found online. Just search for "calculating HVAC duct airflow"

The explanation is not weird: If one is running a pool then one must allow the OEM firmware because that is what the vast majority of miners use. It is tilting at windmills to do otherwise. Sure it bugs the hell out of him but it is what it is. A few years back even -ck bitched about Bitmain using cgminer but later backed off after a certain someone reminded him that he (-ck) led Bitmain down that path by refusing to do any work for the s1 even after BM sent him a miner to test on.

Now regarding,
"Them" of course is referring to miners using 3rd party firmware and yes he DOES prevent its usage on KanoPool. Part of the data exchanged between a miner and pool identifies what the firmware is and his pool software automatically disconnects any miner that is not running OEM firmware. The only exception is BoS because the sourcecode is published and that only works on the Solo pool until it is proven that BoS finds blocks. Once someone finds a BTC block with BoS and can prove it (preferably by mining it on the Solo pool) then BoS will also be allowed on the main pool.

The graphic shows an exhaust fan that pulls in cool air while exhausting the hot air. Just no true indication of the size which of course all depends on the heat load.

Probably an exchange moving BTC between different internal accounts eg, cold storage to hot wallet or visa-versa?
Or, someone cashed out a very nice long-held stash for their retirement =

Yes it does but -- in confined space forced air systems the layout shown is correct. What they are doing by feeding the cooler air upwards at one end of the enclosure is sweeping the hot air from above and forcing it downwards at the end to give a more or less circular airflow inside the enclosure to avoid creating dead spots. They are also relying on the motor fan to provide horizontal airflow towards the inlet side of the box where it hits the wall and moves up to mix with the cooler inlet airflow.

Note that the design is only for small(ish) enclosed layouts - not large layouts with aisles of server/miner racks. Once you dealing with rooms full of gear the airflow's are radically different.

Most folks here will tell you that getting a loan to purchase miners is a very bad idea because it is exceeding risky. Nothing about mining is certain and there is always a good chance that things will not go as you planned. If things go wrong the last thing you will want is a loan hanging over your head.

Now, if you already have some miners and they are providing stable income - and assuming your bank is good with using that income as an asset - you could use that record of income to aid in getting a business loan for other things but I would still be wary about it.

And my point is that using your favorite search engine to look for say "bitcoin mining pools" will turn up a lot more information about what pools are out there. Plus, you will have to decide between a PPLNS pool that pays when they find a block or a PPS pool that pays at a constant rate that depends on what you hash rate is. All have pluses and minuses and wildly varying fees that you have to look at and because everyone has different priorities, decide which they like.

The OP is neglecting to address the fact that a blockchain is a distributed ledger and Bitcoin is simply a currency that has all tx's stored on a blockchain. These days there are MANY applications using blockchain tech and most have nothing to do with Bitcoin. Given that, their title for this topic is wrong as Bitcoin is a currency. Period. While its format allows for inclusion of text and other data the Bitcoin blockchain was designed solely for handling currency.

As the OP mentions, those blockchains are mostly for records keeping. From food production and distribution, civic lighting (streetlights etc), to civil records such as deeds and other property records, taxes, etc you will find blockchain tech used where such data was once stored in a database. Why the change from using a traditional DB? Simple: Security. A normal centralized DB can be broken into and easily modified. A distributed blockchain database cannot be hacked so easily.

Sure. These for example Your local hardware store, Home Depot, etc. should have them.

Key point is you need to have 208-240v ran to it. Is the circuit already 208-240VAC? And if it is, why the hell did the electrician put in a NEMA 5-xx socket rated for only 110V?

That is a blatant code violation... Not so much from a direct risk of fire from the higher voltage but rather because it allows someone to plug devices made for only 110v into it which would have very bad consequences.

For one thing, find a licensed electrician to determine and setup the needed power and wiring. Miners require a lot of power and setting up electrical service for more than a few of them is NOT a DIY project.

Beyond that, you need airflow. LOTS of it. Airflow is generally setup with a 'cold' side where the miners suck in air and the hot side leading to the room exhaust pulling out the hot air and sending it outside. What would greatly help is if you say how many miners, where in the world they are located or at least typical outside air temps, and what kind they are as there are many different ones in the Ant family all with different power requirements...

What the heck did you do to that poor A7? I've ran them all from A721 up to currently A10's and all have been damn near bulletproof despite some running in very hot (>95F) areas.

That said, ALL miners run hot especially these days. Personally I'd stick with Avalons like the A11 or A12's.

A. This area is for BTC only - no altcoins allowed here!
B. Put at least a little effort into things and DYOR. All the pools clearly state what their fees are.

The sticking point to that is that at least in the case of El Salvador, BTC is NOT their formal and official legal tender - their national currency is the US Dollar. El Salvador is just recognizing BTC as a permissible currency to use in lieu of the US$. Given that fine distinction, the Code of Federal Regulations and the Uniform Commercial Code does not apply and BTC does not have to be recognized as a currency.

Depends on your country.
In the US, most definitely because section 179 of the US Tax Codes allows you very significant deductions for cost of the hardware and you can also deduct all other normal business expenses. ref https://www.irs.gov/publications/p535 and https://bench.co/blog/tax-tips/small-business-tax-deductions/ and my favorite - https://www.section179.org/

Regarding having bought coin at a higher price than now, just came across this in the Kanopool discord room https://www.cnbc.com/2021/05/25/bitcoin-crash-opens-door-to-a-tax-loophole-for-investors.html

Seems that for now at least, the IRS lets you sell crypto you bought at a high(er) price and take it as a Capital Gains tax loss, and then re-buy it at the lower price. Can't do that with stocks but you CAN with crypto. To more or less quote the end of the article, the IRS might raise an eyebrow at you doing the sell and then quickly afterwards doing the buy BUT wait say, 1 day to do the buy and you should be defensible if the IRS inquires about it.

I'm fine with the buy I did @ 30k but for the bit I bought at 43k, hmmm...

No because a NEMA 5-20 is for use with 110VAC @ up to 20A - not 220V. The A1047 PSU requires a minimum of 208VAC input and all (NEMA rated) 208-250VAC connectors are NEMA 6-xx.