Fritz Adalis

@FritzAdalis@infosec.exchange
497 Followers
531 Following
24.3K Posts

Infosec Lurker | Technical Debt Collector

It's not for fun, or any sense of community.
It's just trying to dull the pain.

Pronounshe/him
Archive of Dana Sibera (NanoRaptor)'s work

@reiayanami
I like threads on mailing lists, but I use unread marks as 'follow up' flags. Once an unread message goes 'below the fold' it's as good as lost.
@melunaka @xinit @wonka @cstross @NanoRaptor
I don't think the LCDs ever made it to production, unlike the CRTs,
@chillybot @catsalad
No, I'm not in my contacts.
Philly 2600 meets this Friday at @iffybooks from 6-8PM!
Day 479. When restoring a deleted #Azure Storage account, it will always be restored with public network access enabled, even when it previously only had private access. Besides this being a security risk, when you have Azure Policies in place that deny public resources, there is no way to restore the Storage Account.
@badsamurai I know there was a strong correlation between the professors I liked the most and the ones who had been in industry for a while before coming back and being a prof. There really are elements of professors who are so stuck in their ideals of chasing after high end research into theory and optimization problems that they don't really have any exposure to "good enough" lazy programming. It's like the whole "you have to have all this stuff memorized, you can't just Google it" ... Umm, when my Internet is down, I'm functionally worthless at programming. Because there's far too much out there to keep in my brain, and I'd need 10 shelves of books that get replaced every few years to keep all the documentation I might need at any given time (or several dozen gigs of PDFs).

@NanoRaptor
How does he talk to cows?

'E mu.

@thegibson
Happy David Gilmore Girls
The LM555, done wrong. | Hackaday.io

Pages? lets try this... Hi I'm Rue, you may know me from such places as the internet, the information superhighway, and the world wide web.  You may be familiar with the practice of 'circuit bending' often used by hardware hackers to create musical instruments that in turn are used to create compositions questionably referred to as music. ( ;] ) I am indeed a type of minimalist, as such I prefer not to bend circuits, but to bend chips. I have come to you today to talk about bending the LM555 chip. I know you know this chip, everyone knows this chip, its more famous (slightly) than the 6502, its less powerful than the Z80, and it has more gates than a PN2222. This set of bending will be done within the constraints of using the 555 as an RC oscillator, I wont get into using it as a digitally annunciating/resetable window comparitor that drives a relay, or a crystal oscillator, or a logic gate, or a monostable or its uses for vogon face detection, just an oscillator. (Now I just dive in) So, here is the standard 555 circuit you might be familiar with, its... the ( quite boring ) standard circuit... So, there are a lot of parts here we don't need. Lets start with that wire to pin 4. If your using a 555 that is NOT CMOS, it will pull up pin 4 past the reset voltage just fine on its own. so, you don't need that. And we have almost the same circuit. Now, if your using a clean power supply (of course you are) you don't need the capacitor on pin 5. Nice, we removed a real component. πŸŽ‰ This circuit works by a sort of funny its-not-a-voltage-divider. The capacitor is charged thru the two resistors, and when the chip goes into discharge mode, it switches pin 7 to ground, and discharges the cap thru R2. (whilst grounding out VCC thru R1 ) But... we don't need to do that.... Pin 3 goes to ground at the same time pin 7 does, but pin 3 goes to positive power the rest of the time. This can be used to charge AND discharge the capacitor.  So we can ditch a resistor and put the other one between the 2,6 node and 3 so we end up with this.. If you only want an output that is open collector (drive a relay, or LED!) , pin 7 is your friend! Pin 3 can still be used as a digital output. That circuit is the one I almost always use for a 555. its duty is <close to> 50% and, including the 555, its only 3 parts. shame I'm still stuck with that pin 2,6 thing :/ MOHR WRONG Did you know a capacitor blocks DC offsets? so what? right? Well, your timing capacitor does not have to go to ground, it can go to ANY stable dc voltage. And in this circuit, we have 2 of those. Just to be more wrong, lets move the timing capacitor to Vcc instead of ground. There is another thing we can do, we can turn the circuit into a 2 wire flasher (kinda) How? WELL, The CMOS version of the 555 (yea, add that wire back to pin 4) consumes only TINY amounts of operation current. unlike the current needed to charge that big timing capacitor (use a big one!)  So, using that we can make an oscillator that draws pulses of current.  [abrupt end of article, but actually, in fact, the end. Have a nice day, BYE!]

Γ—

All the misspelled news that's fit to print.

So WaPo blockheads are making blockquotes?

Anyway, Sumpre Fi!

@hrbrmstr Even copy editors cannot keep up with the court's insanity