Static over DisplayPort (WHL #33F5)

Okay, I admit – this is a lazy one. But I’m busy playing Path of Exile :mrgreen:

Before removing the faulty Ednet DisplayPort cable from my desk, I gave it another shot and tried capturing the artefacts on camera. A tad difficult as I noticed that the most prominent stuff is only visible on a pure black (#000) background and is very much gone on colorful backgrounds or even patterned images. Which makes it quite hard to capture without the noise from the now pretty underexposed camera sensor. And the autofocus has nothing to focus on, because if there is, the fault goes away. […]

30th September 2018 30th September 2018 By Bzzz In No Comment

BenQ EX3501R, AOC U3477PQU and a faulty DisplayPort cable (WHL #33F4)

Well, who would have thought that the BenQ needed another blog post…

Last week, the line flicker described in got significantly worse. I switched graphics cards the week before (Radeon 260X out, 380 in), which resulted in a driver reset and one Windows boot for the short sighted, but it also caused a bit of movement on the cables, as my computer is rack-mounted. Flicker stuff was the same for a few days.

Then it got so bad that it not only had those intermittent lines, but there were entire blocks of lines just black, audio stuttered, and the entire screen went dark for a second every so often. […]

23rd September 2018 23rd September 2018 By Bzzz In 9 Comments

Bloody chip markings (#R6)

Geez. Just wasted half an hour finding a part number with the actual part in my hands. Maybe I’m getting old. Maybe I should have slept more or less (noon isn’t too bad on a Sunday, is it?). Maybe chip markings are getting dumber with every nonsense package invented. Maybe I should purchase components on my own so that there’s some mail history about it. Who knows.

Care to find that on your own? Now’s the time.

Hints: That’s not TO-220, obviously. It’s also not D2PAK/TO-262 (available in DPAK, though)

It’s a N-channel MOSFET with LV-TTL compatible gate threshold voltage. […]

9th September 2018 26th August 2018 By Bzzz In No Comment

FlowerPower LED GrowLight POWERLIGHT 400W Repair (#P8)

Yeah, sorry for not delaying this until I could declare project #P420, but sometimes I’m a little impatient to get content online. After all, I’m not as enthusiastic about this silly number as some folks apparently are. Which also means I’m getting paid in hard cash and not in kind…

So for today’s repair project I have a quad-100W growlight unit on my desk that was in mortal agony when it arrived. The thing does not have a power-on indicator (usually you do know when it’s on…), all it did was some dim, erratic flickering of the LEDs. […]

2nd September 2018 26th August 2018 By Bzzz In No Comment

Mozilla Firefox/Thunderbird “legacy” addons (#E6F3)

News from the friendly crackpots over at Mozilla:

Hello,

 

You are receiving this email because you are listed as a developer of a legacy add-on on addons.mozilla.org (AMO). Mozilla will stop supporting Firefox Extended Support Release (ESR) 52, the final release that is compatible with legacy add-ons, on September 5, 2018.
 
As no supported versions of Firefox will be compatible with legacy add-ons after this date, we will start the process of disabling legacy add-on versions on AMO. On September 6, 2018, submissions for new legacy add-on versions will be disabled.

[…]
26th August 2018 26th August 2018 By Bzzz In 8 Comments

The SilverStone parts service is great – and terrible (#R5)

After the recent ingress of computer parts I had to sort, check and get rid of stuff before my apartment overflows. I donated quite a bit at the usual hardware forums, I sold a bit, and I trashed a bunch of older parts. One of the donated things was a SilverStone CFP52B 4-in-3 hotswap case (4x 3.5″ hard disks in a 3x 5.25″ form factor if your case can take such an unit)

Well, that was in use for quite some time. Wonky construction (we call it “lidschäftig”, which apparently is local slang straight from medieval vocabulary) with flexible plastic parts encapsulating the HDD, four rubber mounts each that get ripped apart upon insertion, and a total botch of the front “hotswap” fan assembly. […]

19th August 2018 5th August 2018 By Bzzz In No Comment

Mellanox ConnectX-3 3D printed brackets (WHL #42F1)

Looks like I got a project out of the 10GbE card thing…

I have to admit that I was wrong in that post – the 3D model of the bracket over at servethehome doesn’t entirely fit the ConnectX-3 MCX311A. It’s for the higher-end dual cards (that I knew) with QSFPs (that I didn’t check). These are larger in physical footprint, so the bracket does fit by chance, but there’s empty space towards the PCIe connector. Also, because of the dual port architecture, these have their second mounting point shifted up higher, which means the second mount doesn’t even meet the PCB. […]

12th August 2018 19th August 2018 By Bzzz In 2 Comments

Mellanox ConnectX-3 MCX311A-XCAT 10GbE and Solaris 11.3 (WHL #42)

The heat. F*ck me.

I think post #42 deserves something nerdy. More nerdy than usual. Glad to report that I just bought something suitable – two Mellanox SFP+ cards (MCX311A-XCAT), capable of 10GbE over fibre (IEEE 802.3ae) and per DAC cables (not even sure which 802 that is – 802.3ak is Twinax as used in DAC, but thats quad-Twinax as used in CX-4 connectors, like Infiniband does). 55.00€ delivered from the Netherlands, as fast network connections are “Neuland” in Germany and therefore carry a heavy premium. Slap on some 1.5m of compatible FS.com DAC cable for another measly 17.02€ and we have 10 gigabit Ethernet between two desktop computers. […]

29th July 2018 29th July 2018 By Bzzz In 1 Comment

DHT22 WiFi (ESP8266) temperature/humidity loggers (#P7)

Guess who was busy and also did not prepare a post in advance? Yeah, lazy me :mrgreen:

Well, let’s pick up some project that I’m deploying slowly around my flat. I intend to run five of these devices, one with some light meter and maybe other outdoor sensors, the others will be indoors. I’ve been running the early prototype for quite some while now, doubling as a Blynk gateway to some LED strips in the liquor cabinet (yeah, I called it Boozy McBoozeface for a reason). Accessing lights at home from far away isn’t that important to me, so once I have time to install some more touch buttons, that one will be no longer running Blynk, probably eliminating some timing/connectivity issues. […]

1st July 2018 1st July 2018 By Bzzz In 3 Comments

Supermicro Case and Rails (#P6)

Supermicro – the case manufacturer of choice for people with money. :lol:

This is not so much about Wan Hung Lo price ranged products, but rather about construction techniques. And it’s not even about “we made it this way because it’s the cheapest” – it’s about design that yields the most profit for the manufacturer. Vendor lock-in and all that stuff.

Well, I’m more of a Chenbro guy for reasons that I’ll explain in a bit, but I recently did a classic Dave Jones dumpster dive (with permission), from which I got not one, but four Supermicro cases. […]

3rd June 2018 3rd June 2018 By Bzzz In No Comment