Author | Lightnews

OldMattyB

@oldmattyb.bsky.social

170 followers 250 following 210 posts

Retired controls/software/firmware/security engineer. Been a long strange road from TTY repair to OSCP. #MKE.

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OldMattyB @oldmattyb.bsky.social · 12h

Aha!!!

A 7805c regulator attached to a heat sink.

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OldMattyB @oldmattyb.bsky.social · 14h

That would 100% happen to me. That’s a big part of how I got to this point 🤣

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OldMattyB @oldmattyb.bsky.social · 14h

Dammit! I know I have some 7805 regulators in here somewhere....

A big mess of electronic crap on a desk. Somewhere in that haystack is the metaphorical needle I'm looking for

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OldMattyB @oldmattyb.bsky.social · 2d

Connections
Puzzle #874
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OldMattyB @oldmattyb.bsky.social · 6d

Doing a little prototyping today

A small square of perfboard. Mounted on it are an ESP32S3 microcontroller board, a U-Blox GPS module (with antenna), 6 N-channel FETs, 2 RGB LEDs, and 2 47-ohm resistors.

The bottom (not seen here) is a small rat's nest of wire wrapped connections.

OldMattyB @oldmattyb.bsky.social · 6d

My helper today.

An IKEA KALLAX storage unit. 6 of the square cubbies are filled with fabric boxes, one has some random junk, and the last is holding a tabby cat.

The cat's name is Molly, and she doesn't care that I would like her to move so I can return the items that are normally stored there.

OldMattyB @oldmattyb.bsky.social · 6d

Connections
Puzzle #870
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Reposted by OldMattyB

Karly Kingsley @karlykingsley.bsky.social · 10d

🎯

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OldMattyB @oldmattyb.bsky.social · 12d

I love the expandability of the Bus Pirate. Fully open source with a great community, it's easy to add new functionality to interface to different hardware and busses.

Ian @ Dangerous Prototypes @buspirate.bsky.social · 12d

It took 3 revisions to get right, but the DDR5 RAM SPD adapter is now available. Use with the Bus Pirate to read and write DDR5 SPD EEPROMs. HSA pin is grounded so blocks can be unlocked (offline mode). UDIMM (desktop) and SODIMM (laptop) supported.

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OldMattyB @oldmattyb.bsky.social · 12d

Ugh. Looking for one particular component. I cleaned and sorted my stock of parts 18 months ago, and it looks like it's time to do it again 🤷‍♂️

An IKEA L-shaped desk covered with an assortment of dev boards, discrete components, test equipment, and various bric-a-brac.

OldMattyB @oldmattyb.bsky.social · 16d

Milwaukee representing.

OldMattyB standing in Cathedral Square Park in Milwaukee. He is there for the No Kings Rally.

He's wearing his 38 year old BDU shirt with sergeant stripes open over a rainbow "Happy Jack" shirt from DefCon a couple of years ago. A pin showing the Ukrainian flag is placed over the US Army patch.

OldMattyB @oldmattyb.bsky.social · 25d

Oh, that's cool! Thanks for sharing

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OldMattyB @oldmattyb.bsky.social · Oct 5

It's a beautiful full moon in October in #Minneapolis.

Too bad it's 81 fucking degrees at 9 pm. What the actual?

Reposted by OldMattyB

Jayson Stark @jaysonst.bsky.social · Oct 4

Let's sum up the first 2 innings in Milwaukee.

Brewers:
20 hitters came to bat
14 of them reached base
9 runs
3 hits by Jackson Chourio in 2 innings

Cubs:
2 guys in their lineup haven't even gotten an AB yet!

It's the most Brewers game ever

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OldMattyB @oldmattyb.bsky.social · Oct 1

A little Wednesday afternoon war driving.

The inside of a car. Visible is a System76 computer, a USB cable connected to an ESP32 dev board. That board and an antenna are Scotch-taped to the vehicle's windshield.

OldMattyB @oldmattyb.bsky.social · Sep 27

Connections
Puzzle #839
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OldMattyB @oldmattyb.bsky.social · Sep 25

Hey, what's up with that old pair of steel toes?

Have you seen me swing an axe?

My foot, sheathed in a beat up steel toe boot, next to an axe. There's the start of a split wood pile nearby.

OldMattyB @oldmattyb.bsky.social · Sep 25

(I'm at home now, that's why I can calmly compose this skeet)

What do you do, fam? There are plenty of signs stating no using a phone as a phone in the gym, please go to the lobby to make or take calls.

Anyway. People, amirite? Or am I the aberration with no headphones or buds?

OldMattyB @oldmattyb.bsky.social · Sep 25

At the gym raw-dogging the rowing machine (no phone, no music, no earbuds; just rowing along with my thoughts), when a jagoff behind me starts loudly talking into his phone. His phone that's on speaker.

Not even pretending to be using that elliptical; just leaning on it, hollering into his phone.

OldMattyB @oldmattyb.bsky.social · Sep 25

How much hardware does one need to read the code out of an MCU if the "proper" programmer isn't available?

Well, so far I've got a @buspirate.bsky.social, a Saleae, an Arduino, some perfboard, & way too many cables 🤣

(Not shown: soldering iron and tools, scope/meter, various hand tools, coffee)

A messy work desk with a tangle is wires and cables. In that nest are various hardware tools. It's truly a mess.

OldMattyB @oldmattyb.bsky.social · Sep 21

Sheesh, autocorrect.

"this is a much more conventional resting position".

Ugh.

OldMattyB @oldmattyb.bsky.social · Sep 21

He's such a house panther!

OldMattyB @oldmattyb.bsky.social · Sep 21

This is a much but conventional testing position

A black cat, very relaxed, laying on the top of a sofa back cousin. His gaze is casual, ears perked.

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OldMattyB @oldmattyb.bsky.social · Sep 20

HOW IS THIS EVEN COMFORTABLE??

A tabby cat laying on a coffee table. She lays with her hips crunched in, on her belly, front legs tucked in and the side of her face down.

It doesn't look comfortable, but she lays like this quite often.

OldMattyB @oldmattyb.bsky.social · Sep 20

(Apples and apple fest are a Big Fucking Deal™ in Bayfield)