iiinova — where your digital self keeps evolving

Dima @dmytroengineering.com · 27/09/2026

I might be onto something

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nnnilabs.net @nnnilabs.net · 26/09/2026

oscillators don't, but amplifiers always seem to 😖

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Dima @dmytroengineering.com · 22/09/2026

Time to revive my SoM project. This is such an idiotic way to shoot yourself in the foot it's insane. Perfectly reasonable alternatives exist, but they decided to be HP...

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nnnilabs.net @nnnilabs.net · 20/08/2026

anyone see the problem here?

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nnnilabs.net @nnnilabs.net · 17/08/2026

Maker Faire Hannover Post 2: @dmytroengineering.com helped me unbrick an MSO-X 3034A! NAND flash corruption is a known issue and repairs are well-documented, but we came up with a method that uses ethernet to load the flash, plus this gives us an opportunity to bypass future NAND degradation!

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Dima @dmytroengineering.com · 29/07/2026

They can if you think about the architecture of the underlying computer a bit harder 🧌

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nnnilabs.net @nnnilabs.net · 25/07/2026

just like the render (jumped the gun on the inductances)

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keke @kekekeball.bsky.social · 21/07/2026

ThinkPad durability test

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nnnilabs.net @nnnilabs.net · 11/07/2026

bodges are inevitable 😖

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Dima @dmytroengineering.com · 29/06/2026

Arxiv is trying to push html now exactly because of this info.arxiv.org/about/access...

info.arxiv.org

HTML as an accessible format for papers - arXiv info | arXiv e-print repository

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Dima @dmytroengineering.com · 07/06/2026

I'm just working on my own CAD at this point, I just can't get my brain to FreeCAD no matter how hard I try...

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Dima @dmytroengineering.com · 07/06/2026

If anything it's a testament to what can be done with even a simple and old ISA if it's overclocked enough and the tooling is well understood.

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Dima @dmytroengineering.com · 27/05/2026

Waiter! Waiter! There is an 8051 in my 10Gbit Ethernet SFP+ module!

A circuit board from an SFP+ module with a RTL8261B in the center an Ethernet transformer to the right.

A circuit board from an SFP+ module with a STC8H8K64U 8051 Core IC on the right side. The left side contains gold fingers for connections, and a power supply section. The right end is the plastic piece of the Ethernet port.

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Dima @dmytroengineering.com · 22/05/2026

I believe PCI-E does quite a bit of training and optimization on startup (see: www.ti.com/lit/pdf/snla... ) so it can remain stable even in quite bad conditions.

ti.com

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Dima @dmytroengineering.com · 22/05/2026

Don't worry about it too much, it's quite fault tolerant, all of the below worked at full speed just fine.

A 10Gbit Ethernet PCI-E card sitting outside a desktop PC, connected with a very long raiser cable.

A graphics card connected to a thin client m.2 port through a PCI-E raiser cable.

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Dima @dmytroengineering.com · 22/05/2026

Least over engineered pointing device

The insides of a Logitech Anywhere MX mouse showing multiple boards, interconnect ribbons and a lot of components for a seemingly simple mouse.

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nnnilabs.net @nnnilabs.net · 21/05/2026

attoamperes?

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nnnilabs.net @nnnilabs.net · 19/05/2026

today I'm testing the dielectric absorption test stand

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nnnilabs.net @nnnilabs.net · 15/05/2026

I just realized that my new signal generator has adjustable rise and fall times, so here's a demonstration of I/C = dV/dt using a 10 nF / 1 kΩ highpass filter

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Dima @dmytroengineering.com · 14/05/2026

RIP Marvell 10Gbit NIC... At least you gave us the ball pinout in return for your sacrifice... Another sacrificial 10Gbit card (Realtek this time) has been ordered, why can't they just make the datasheet public smh...

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nnnilabs.net @nnnilabs.net · 14/05/2026

the HMC8043 completes my all-LAN all-SCPI setup! to celebrate, I wrote a script that loads a few useful voltage/current configurations without having to fiddle with the front panel controls

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Dima @dmytroengineering.com · 14/05/2026

This is great, I need something like this for my dangerous tools

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Dima @dmytroengineering.com · 07/05/2026

I was thinking of powering the MCU directly without any battery at all, or a small MLCC bank maybe.

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Dima @dmytroengineering.com · 07/05/2026

It's a fairly modern Lenovo ThinkPad the MCU on the other end will draw 3mA in its peak so it can even work through a pull-up with some capacitors. In practice tho I'll just attach the board in various standby power supply rails and see what happens.

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Dima @dmytroengineering.com · 07/05/2026

This may or may not be related to the Google and Apple tag ramblings I was on about recently

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Dima @dmytroengineering.com · 07/05/2026

I wonder how much current I can draw from the 3.3V standby supply on the power button of my laptop...

A close up of the power button PCB from the bottom, screwed inside a metal laptop frame. The PCB is connected to the motherboard through a 4 pin flat flex cable.

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Dima @dmytroengineering.com · 07/05/2026

I'm pretty sure KiCAD has an importer for that built in, although there might be some quirks. At least there are reasonable workarounds for them: hackaday.com/2023/07/01/i... Although that was 3 versions ago surely most of the issues must be fixed by now...

hackaday.com

Importing EAGLE Projects Into KiCad 7, And How To Fix Them

Migrating a PCB design from one CAD software package to another is no one’s favorite task. It almost never works cleanly. Often there are missing schematic symbols, scrambled PCB footprints, …

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Dima @dmytroengineering.com · 06/05/2026

Also, I really like that vertical screen for the music playlist, very neat idea! I should get one...

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Dima @dmytroengineering.com · 06/05/2026

I highly recommend you give KiCAD a try. It's gotten very good recently to the point where some of my die hard Altium friends switched to it now. And because it's FOSS, nobody can ever take it away from you which is the biggest win!

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Dima @dmytroengineering.com · 03/05/2026

How does that even happen?

A KDE lock screen screen brightness indicator with broken rendering. The text and borders have rendering artifacts, the bare representing the brightness value is seemingly tilted.

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nnnilabs.net @nnnilabs.net · 29/04/2026

okay so now I have like a very expensive clock

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nnnilabs.net @nnnilabs.net · 26/04/2026

JFETs are underrated

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Dima @dmytroengineering.com · 16/04/2026

Just connecting a client with a 10Gbit NIC to my router's 10Gbit Ethernet interface causes the average power draw of the entire rack to jump up by 3-4W. Not even routing traffic, just having a 10Gbit link in general.

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Dima @dmytroengineering.com · 13/04/2026

My secret to cooking? Even temperature control.

A thermal camera image of rice in a pan.

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Dima @dmytroengineering.com · 09/04/2026

I cooked, it works, write-up and video in half a year...

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Dima @dmytroengineering.com · 09/04/2026

Turns out Google is quite weird if you want to get working key rotation on your DIY tags... But I think I'm onto something and just need a bit more testing to confirm.

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nnnilabs.net @nnnilabs.net · 05/04/2026

it's this circuit: www.radiolocman.com/shem/schemat... but much faster! delay is adjustable between 0 and 1 μs and the output pulse is 10 ns (available in both polarities) a 12-bit DAC controls the delay, so the delay should be adjustable in steps of 250 ps

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nnnilabs.net @nnnilabs.net · 05/04/2026

yep... 4 gigasamples per second with "6.5 digit" resolution... it took 33 minutes to capture 1.2 μs worth of waveform (timebase not calibrated yet)

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Dima @dmytroengineering.com · 03/04/2026

Don't have any Samsung devices to test it, besides the Samsung implementation is not very good to begin with 🥴 www.usenix.org/system/files...

usenix.org

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Dima @dmytroengineering.com · 03/04/2026

I have now abused Apple Find My and Google Find My (Hub?) (why are they names the same?). Now I have a low power Bluetooth MCU, a debugger and some free time. About to make a horrible polyglot tracker abomination.

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Dima @dmytroengineering.com · 28/03/2026

Reminder to configure earlyOOM and or watchdog on your servers... In case some fuckass service decides to leak memory at GBytes per minute and lock up a remote machine with no kvm 💀

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Dima @dmytroengineering.com · 08/03/2026

How much network bandwidth can I use before my ISP does something? Can I just saturate my uplink 24/7?

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