Thursday, June 29, 2023

Using software to harden computers for spaceflight

" The software monitored all aspects of the hardware, and when the system detected conditions outside the established parameters, it would alert the HPE team on the ground and go into a safe state until the problematic conditions passed. Although the system could not determine what was causing the problem, the software was designed to reduce performance in a stairstep fashion to keep the hardware safe."

" The HPE team sent two identical computer systems to the ISS for the SBC-1 mission and kept two identical systems on Earth as controls. This allowed the team to confirm SBC-1 was getting the correct results and to compare the time it took to get the results on Earth versus in space."

" SBC-1 did experience more correctable errors than the Earth-based control systems. The HPE team thinks this is likely due to solar flares, galactic radiation, and other phenomena encountered in space.
...
Both the fast- and slow-running systems encountered about the same number of correctable errors, ..."

" The space environment also took a particular toll on SBC-1's solid-state disks—out of 20 solid-state disks, 9 failed during the mission. The system had redundant copies of all data, so no data was lost, but the team plans to try different methods to better protect the solid-state disks during the SBC-2 mission."

" For the SBC-2 mission, HPE's computer system will be open to any investigator that could benefit from in-space processing."


Wednesday, June 28, 2023

Tuesday, June 27, 2023

AR15 lowers for Glock magazines

Use for 9mm or 40 S&W carbine ...

PSA PX-9 Forged Stripped Lower with Mag Catch Assembly & Ejector - uses Glock magazines ($119.99 0n sale - June 2023): 


PSA PX9mm Forged Complete MOE Pistol Glock®-Style Lowe ($199.99 0n sale - June 2023): 
 
#AR-15, #AR15, #AR-40, #AR40, #AR-45, #AR45, #AR-9, #AR9, #AR-16, #AR16, #M-16, #M16,  

Sunday, June 25, 2023

DIY Brass Annealer plans

Use to anneal (heat-treat) rifle cartridges for reloading -

Annealing without an annealer - https://www.youtube.com/watch?v=Mi3OoeYUPec
Uses a cordless drill and a deep socket.  Aim torch away from the socket.  Timing is essential (around 6-8 seconds for his cartridges) - use a timer on a cell phone?
Consider building a mount for the drill & propane bottle to control their relative positions.

Awesome DIY Annealer for $15 (minus torches and propane): https://www.youtube.com/watch?v=yL0WnIip6VI
Uses 2 propane torches ...  Has brackets for each torch and a shell holder that rotates to dump the hot case.
A lock nut is used to set the rotating tension.  Use a wooden dowel in the black pipe nipple to position the brass.  Also needs a timer of some sort.

cheap homemade brass annealer machine, this one is powered by a drill: https://forum.accurateshooter.com/threads/cheap-homemade-brass-annealer-machine-this-one-is-powered-by-a-drill.3893503/
https://www.youtube.com/watch?v=K6sm4cmNADw
This one uses a Lazy Susan Bearing for the drum

DIY Automatic Case Annealer Project: https://www.68forums.com/threads/75-diy-automatic-case-annealer-project-complete-plans-and-parts-list-included.54267/
https://docs.google.com/document/d/1bb_cm10J8urCM2PtKql8VyHtGlovTeI3RnAj7xa0eX0/edit
 
Low budget DIY Brass Annealer: https://www.youtube.com/watch?v=sramAkKTFIg
Motor has a gear system to slow it down to 10 RPM.  An electronic speed controller is also used.  The drum is a stainless steel cake pan (get some heavy duty ones with thicker steel) from eBay (get a few for different size cartridges).
Note: uses propane from a camp stove bottle.

DIY BRASS ANNEALER DETAILED GUIDE FOR ~$100:
Lots of details about the parts & sources:  https://www.youtube.com/watch?v=k0xE-6bSwME
More professional looking, probably worth the money for the ease of use.

DIY Induction Annealing Brass with .01 second accuracy for $200: 

Homemade cartridge brass annealer:  https://www.youtube.com/watch?v=J6VWUTUsRpg
" Sep 22, 2020 - My Water Cooled Induction annealer ...  Proper annealing will help maintain consistent neck tension and shoulder bump as you size cases.  
Amazon parts list (see comments below video):  As of September 2020, the cost of the parts is around $170.  I did not include wiring (use something like 12 AWG stranded) and the pigtail (for an appliance like a dishwasher, use a 3 wire pigtail) for the power supply..."
Consider a case holder/base that lets the hot case fall away instead of grabing them with pliers.
https://www.snipershide.com/shooting/threads/homemade-induction-annealer.6966638/#post-8031348
https://www.amazon.com/gp/product/B01C70G7Y8/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1
 
#Anneal, #Annealing, #Annealer, #Aneal

How To Build a Knife Vise

This bench vise is made from steel tubing and some scrap steel plate, along with a few bolts and other parts.  It assists you in grinding & polishing knives and other small pieces.

Saturday, June 24, 2023

Defensive Handgun Choices for Seniors

One of the most common symptoms of shooters who are also senior citizens is poor grip strength. Handgun manufacturers have begun marketing pistols that are easy to rack - a big help to some senior shooters.  .380 ACP pistols (like the S&W M&P 380 Shield EZ, Ruger Security 380 Lite Rack, & Walther PK380) from the major manufacturers are all worth trying, and there are some easy-rack 9mm pistols (like the SIG 938 & Walther CCP) available too.  There are differences in all of our hands sizes, so it is best to try manipulating a pistol in a gun store before committing to it. If your local range rents the pistol(s) you're considering, then certainly take the opportunity to fire a few targets worth of ammunition with a rental.

Revolvers work well for many seniors in a defensive role too.  The most common small revolver is a 5 or 6 shot "snubbie".  These are available in all-steel and a mixture of steel & alloy (lightweight) parts, along with a few that also utilize some polymer parts.  Light weight makes a revolver easy to carry, but they can be more difficult to shoot.  Again trying a rental gun at your local range would help.  The most common caliber for defensive revolvers is 38 Special.  The more powerful 357 Magnum is also available in some of these revolvers, and you can actually do much of your practicing with 38 Special - just be sure to familiarize yourself with the blast and recoil of a 357 (every time you practice) if that's what you plan to carry.  Excellent revolvers are available from S&W, Colt, Ruger, Kimber, Taurus, and other manufacturers.

Note that 9mm, 380, & 38 Special cartridges are available in dozens of configurations with bullet weights from 90 to 158 grains (and more).  In general, lighter bullets generate less recoil, making them easier to shoot.  Heavier bullets are generally considered to have a greater effect on the target, possibly requiring fewer shots to neutralize them.  This is complicated by cartridges designed for different purposes, and in some cases "+P" cartridges.  Cartridges marketed as Defense rounds should be adequate for your self-defense needs, but be sure to practice a bit with them, along with some cheaper practice ammunition.

A new cartridge just entering this arena in the 30 Carry (like the S&W Shield EZ 30 Super Carry):
https://www.americanrifleman.org/content/new-for-2022-30-super-carry/

For folks with extremely limited hands, there are smaller and lighter options all the way down to 22 caliber pistols and revolvers (like the Ruger SR22 .22 LR pistol & S&W 351C .22 Magnum revolver).  Keep trying until you find something that works.

Regardless of what you choose as a self-defense handgun, you need to get to a range and shoot it several times a year.

Top 5 "Small" Carry Choices for Arthritic Hands:  
https://blog.cheaperthandirt.com/top-5-small-carry-choices-arthritic-hands/

6 Best Guns For Women With Arthritis:
https://thewellarmedwoman.com/about-guns/6-best-guns-for-women-with-arthritis/

Quick 4 Stand-Alone Transmission Control

Modern overdrive automatic transmissions need a computer controller when installed in older vehicles. This one works for Chevy & Ford transmissions.
https://www.usshift.com/usq4.shtml?

Monday, June 12, 2023

Security tips for home PC users

"5 unusual cybersecurity tips that actually work
Posted: June 5, 2023 by Mark Stockley
So, you're on top of your software updates, you use a password manager, you've enabled two-factor authentication wherever you can, you've got BrowserGuard installed, and you're running Malwarebytes Premium.
If you're doing all of that you're already winning at security. But you want more, because you know that security is a journey and not a destination, and, let's face it, you're reading an article about five unusual cybersecurity tips: You're hooked.
It's time to innovate and get weird. It's time to shake off that special feeling, start lying, forget everything you've been told about passwords, spin up a million email addresses, and start throwing away computers for fun.
It's time for five unusual cybersecurity tips that actually work:
1. Lie
Generally speaking, the fewer pieces of data you hand out, the safer you are. If a site is asking for data you don't want to share, remember: Sometimes it's OK to lie.
If a site wants a phone number and you don't want them to call you, fake it. (00000000000 is surprisingly effective.) If the site won't accept your made up number, don't worry. Lists of fake numbers that look right for your country but don't work are a short Google search away. It works for other data too, even fake credit card numbers—you won't be able to buy anything with one, but neither will anyone who steals it.
2. Stop thinking you're special
Everyone is a star in their own story, so when we unexpectedly get a message from a lonely young Russian lady who's recently moved to our town, a Nigerian Prince promises us riches, "Keanu Reeves" follows us on Instagram, or we stumble upon the crypto-opportunity of a lifetime, our exceptionalism can kick in.
If it happened to somebody else, we'd be sceptical, but when it happens to us...well, we had a feeling our luck was about to turn! Burst that bubble. If something looks too good to be true, it isn't because you're special, it's because it IS too good to be true. Sorry.
3. Forget strong passwords
For years you've been told to make unreadable passwords with a of mix uppercase letters, lowercase letters, and wacky characters. That is still important, but reusing passwords over and over again is actually much worse than having lots of different, weaker, passwords.
If a thief can steal your password from anywhere, they will try to use it everywhere, and if the same password works everywhere, you've lost everything. Your goal should be to create a new password for each service you use. Focus on simply avoiding really awful passwords, like "password" or "12345", and save the unreadable passwords for things that really matter, like your bank.
4. Use endless email addresses
Look at your inbox for a few minutes and you'll probably start to wonder "how did they get my email address?" In between the messages from friends and colleagues, and the newsletters you signed up for but never read, there is always a smattering of speculative nonsense from people who have no business using your email address.
One way of getting on top of that problem is to use a different email address for each account you sign up for. Apple will do this for you with its Hide My Email feature, and if you use Gmail you can just add a "+" to the name part of your address followed by anything you like, e.g. john.doe+malwarebytes@gmail.com.
Each unique address should only get messages from the site where you used it. If any other sites use it, you know that your data has been leaked, stolen or sold. If that happens, block the email address and consider closing your account on that site.
5. Throw your computer away
If you want to say super-safe, just browse the internet using a computer with no sensitive data on it, and throw it away when you've finished, simple!
OK, it sounds expensive, but you can do it for free with tools like Oracle's VirtualBox. Virtual Machines (VMs) are computers made of software instead of plastic, metal, and silicon, that run on your computer just like any other program. You can run Windows, your web browser of choice, and all your other favourite apps inside a VM, where they are totally isolated from your real computer.
Like trips to Vegas, whatever happens on a VM stays on a VM. And because VMs can be cloned, rolled back, or destroyed with a mouse click, if anything bad happens on yours you can simply trash it and start a new one.