Kyle Rankin @kyle@librem.one

The server's anti-virus wasn't up to date... https://arstechnica.com/information-technology/2021/10/passengers-couldnt-fly-after-nhs-vaccine-passport-went-offline/

@jlcrawf There's more to come! I'm going to feature a new one weekly, spaced out so as not to deluge my timeline all at once.

@ajmartinez There is also this, but the original site is offline now so we'd have to rely on wayback machine: https://www.thingiverse.com/thing:1813308

@ajmartinez That would be an incredibly fun project. Most of the replica kits I see out there just replicate the outside, the inside is an arduino or similar. I'd love to replicate a mechanical version.

Apparently there are CAD renders here: https://grabcad.com/library/enigma-machine-replica-1#!

Eventually John Conner will drop from the future into that street. That much is known, the machines just don't know exactly when. https://sanfrancisco.cbslocal.com/2021/10/14/dead-end-sf-street-plagued-with-confused-waymo-cars-trying-to-turn-around-every-5-minutes/

We are testing out a new experimental feature in PureBoot to extend tamper detection past /boot into the root disk. I write about the feature and my thought process behind developing it here: https://puri.sm/posts/new-pureboot-feature-scanning-root-for-tampering/

"I'm really into mechanical calculators and also security. A mechanical cipher machine would be really cool to add to the collection." Then I saw the going rates for vintage WWII cipher machines... #nope #toorichformyblood

@yaelwrites Especially this time of year!

The Burroughs adding machines aren't my favorite to use, but they are my favorite to look at. Check out the lines on this 100-year-old Class 3. It reminds me of sedans from that era.

There are few things as satisfying as fixing something you are unfamiliar with by researching how it works and applying basic troubleshooting skills. In other news, the furnace works again (insufficent pilot light flame around the thermocouple).

Adding to my collection...

Due to the size and the case design, I suspect Addometers were mostly stored on or in desks and pulled out for quick arithmetic and they work well for that. The Imperial model I have was probably thrown in a toolbox and has lots of wear and even initials carved in it.

As I mentioned the Model C was designed for Imperial measurements and had a dial that went up to 11 so inches could carry over into feet. Here I'm calculating 2' 9 3/4" + 1' 6 7/8". Doing math with Imperial measurements really makes you appreciate the Metric system.

You can also perform division using the repeated subtraction method but you have to keep track of the number of subtractions in your head. To clear the registers, just pull on the lever on the right side. This also ejects the stylus for you if it's in storage.

To multiply, perform repeated addition and shift left for each term in the multiplier. Here is 12 x 12.

To subtract, use the smaller digits on the outside of the dial to enter the subtrahend and rotate anti-clockwise. The mechanism also will decrement from the left side automatically. Here I'm subtracting 50 from 31341.

To add, put the stylus in the dial for the corresponding digit using the larger numbers, and turn clockwise until the dial stops. The mechanism automatically carries the one without having to move in different directions like with a "shepherd's hook" design. Here is 31337 + 4.

My Model A came with the original case, which was designed with a notch cut in the side so you can access the stylus storage and the clearing lever without removing it from the case. It also came with the original instructions!

From a distance they look similar but the Model C was designed for adding Imperial measurements and has a dial that goes up to 11 for adding inches. Both models feature a dial for fractions on the far right, where Model Bs only have decimal dials. All models have a ruler on top.