Linker3000's Avatar

Linker3000

@linker3000.com.bsky.social

My career began in electronics & now it's in IT. I talk nonsense here about my hobby stuff: Electronics, STEM, IoT, Meshtastic, Vintage 8-bit computers. My dog is called Holly & she's much cuter than me | West Sussex, UK | Views are my own humble opinions.

117 Followers  |  80 Following  |  651 Posts  |  Joined: 18.09.2023  |  1.8026

Latest posts by linker3000.com on Bluesky

The LCD panel is fixed to the other side of the PCB so I can't stare at its chipset without breaking things apart.

05.08.2025 17:40 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
3.5" CYD display board.

3.5" CYD display board.

Getting over excited with the 2.8", ESP32-based "Cheap Yellow Displays", I bought a 3.5 incher. Darn, it uses a different LCD controller chip not supported by the common Arduino GFX libs.

Any chance someone knows what LCD controller chip is used and has example code to drive these things?

05.08.2025 17:37 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0
Holly the dog stretched out on the sofa.

Holly the dog stretched out on the sofa.

Holly is providing backup.

05.08.2025 16:16 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Next you'll be telling me those other folks aren't really mechanics?

05.08.2025 16:03 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Keep smiling. Hope it all works out for you.

05.08.2025 15:57 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Last night, my old car was parked downhill on a grassy motorway embankment & I had taken half the interior out because I needed to resolder a wire. By luck, there was a utility cabinet nearby with an external power socket for the iron and I had an extension lead. I woke up before the job was done.

04.08.2025 15:52 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Phew...

Milestone 4 doc submitted at end of last month. Yay!

What to work on?..

* Finish setting up Jira.
* Arrange annual, multi-platform pen test.
* API / DB integration fun with a new dev framework.
* Finish process docs for new Web site.
* Web site final accessibility audit.
....etc

Aargh.

04.08.2025 15:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Sprinkle in plenty of "Reasonably-priced"

04.08.2025 14:55 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I had the news on BBC Sounds playing audio on my phone early this morning, and the presenter said "Good morning to you, if you are watching*", and I thought, well that's a bit exclusionary.

*Could have been "listening", I wasn't paying *that* much attention.

04.08.2025 11:38 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Wife's office bldg was hit by lightning mid week. Today we went to take a look:

* No outlet power - tripped MCB.
* IoT server (not biz critical) - blown network interface.
* 200Mbit Home plug dead. Took in apart at home - insides charred. Had a spare.

Cont...

03.08.2025 16:18 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Screenshot of the WordStar for CP/M opening menu on my Z80 board.

Screenshot of the WordStar for CP/M opening menu on my Z80 board.

'fraid so.

02.08.2025 21:22 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Wl, it didn't say "Maybe later", so some comfort.

01.08.2025 05:33 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
ESP32 CYD with LVGL: Weather Station | Random Nerd Tutorials Turn your ESP32 Cheap Yellow Display (CYD) board into a weather station that displays weather description, temperature, humidity, and date using LVGL. We'll use the Open-Meteo API to get the weather data

Bought an ESP32-based Cheap Yellow Display (CYD) with touch screen to have a play. Found an excellent tutorial for a simple weather display at randomnerdtutorials.com/esp32-cyd-lv... then added a clock, network info, NTP time sync and a few other changes.

github.com/linker3000/E...

26.07.2025 05:04 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Oh, I thought it was poems.

25.07.2025 21:27 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It's a small courgette the size of a medium banana.

25.07.2025 13:08 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Turned on my big Android-based lounge TV for the first time in 6 months (that says a lot!) and of course there's a 1.2GB update to download and install.

Reckon it'll be 30 mins before I can watch anything or throw my laptop screen onto the Tele.

Remind me why I hate 'smart' TVs so much.

25.07.2025 13:02 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Best wishes. Hope it all works out.

+Vibe
+Vibe
+Vibe

21.07.2025 12:13 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

And so it all began.

19.07.2025 13:15 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

...or you can have words with Virgin..!

15.07.2025 11:46 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

We ended up with 1Gig symmetrical FTTP for the same cost as our 67Mbit ADSL. No brainer.

15.07.2025 11:39 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

That chip came up in a list of potential drop-in replacements, but I went with a like-for-like in case there were any design differences such as inductor value.

13.07.2025 13:12 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
Reddit - The heart of the internet

Just an infrequent reminder that there's a UK-oriented #Meshtastic Subreddit that's always on the lookout for relevant contributions to help grow its user base.

www.reddit.com/r/Meshtastic...

13.07.2025 12:48 β€” πŸ‘ 0    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Yep, it got me at first & then I fat-fingered it in the pic setup - There's a bit of crud on the chip. The photo of the whole board makes the part no easier to see if you zoom in.

All confirmed by a Web search for both numbers..CL6291 gets you a DC-DC converter.

CL5291 gets nothing relevant.

13.07.2025 12:42 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Just correcting the ALT text for the chip pic - it's a CL6291, not 5291.

13.07.2025 12:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Close up of CL5291 chip on PCB.

Close up of CL5291 chip on PCB.

Pic of whole controller PCB

Pic of whole controller PCB

One of our cheap USB desk fans has blown its PWM chip - a tiny, 6-pin SOT-23 device. I've bypassed the board so the fan runs.

The chip's on AE @ 10 for 95p. I know dismantling the fan again, removing the PCB and using a heat gun to remove/replace the chip will be hassle, but it's gotta be done!

13.07.2025 11:57 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

You..you mean... we're brothers!

OMG!

12.07.2025 21:21 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Looks like a big Rifa!

...not worrying at all.

/What has been seen...

12.07.2025 18:45 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
htop screenshot, showing CPU load average as 8.72. It was just over 9 a sec ago.

htop screenshot, showing CPU load average as 8.72. It was just over 9 a sec ago.

My poor Atom 360 box is doing its best at being an IoT server. Startup is always the hardest part - see pic.

It's hot here in West Sussex. The box itself is one fan down at the moment and tells me the CPU temp is 77C. The shutdown temp is 85C and it made it to 84C this afternoon.

11.07.2025 20:01 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Reaching the end of a 1 week experiment in vibe coding in Appsmith. Lots of REST API and SQL + UI design. I've not done heavy data coding for a while but I know my algorithms.

Conclusions:

* CopyPasta doesn't stick as a training method.
* I had to AI iterate through duff code - a lot.

Cont..

10.07.2025 22:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Preview
Appsmith | Open-Source Low-Code Application Platform Stop grappling with data, scouring for the perfect React library, and coding everything from scratch. Build custom software 10X faster with Appsmith.

I'm doing an eval. of the app development framework Appsmith, with a need to integrate data views & updates between database and REST API calls. Any others worth looking at, preferably Open Source or with a Community version?

www.appsmith.com

(Ignoring the fact they've drunk the AI Kool-Aid)

08.07.2025 06:51 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

@linker3000.com is following 20 prominent accounts