[chbot] Robotics Group meeting, 5 Idris Rd, 630pm, Mon 18 Aug 2025 report

[william fleete]

https://imgur.com/a/RUcwYpQ
You wanted to know what was inside one of those splitters? Managed to get
the lid off one of them!

On Mon, 18 Aug 2025 at 21:31, Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Hello everyone,
>
> Good turnout with 32 attendees, and lots of huddles-of tech-talk. $47 +
> change (in gold, and flat-money) collected and transferred into the
> robotics loose-change jar (for later banking).
>
> All sales from the trading table should go into the brown box on the
> wall, and are directly for the benefit of our host club, Christchurch
> Amateur Radio Club, NZART Branch 05.
>
> Equipment donations are welcome for the trading table, but no CRT based
> product, printers, toner or items that are likely to be a disposal burden.
>
> With thanks on behalf of the group,
>
> Mark Atherton
>
> ===========
>
> Coming up next month, Roger Corbett with the art of EME – bouncing radio
> signals off the moon, and back.
>
> Mark talked about a semi-discrete optical interface found on an old
> fibre-optic terminal. The unit has a laser diode on-axis with the fibre,
> while the detector assembly is mounted at 90 degrees, presumably with a
> tiny dichroic prism inside to separate the light by wavelength. Body of
> whole unit is 6 x 6 x 11mm.
>
> ChatGPT 5 was put through its paces by uploading complete datasheets for
> two obscure signal processor ICs used in a CD player, along with a 20MB
> capture of Q channel and control channel data. The AI successfully
> decoder Table of Contents for the CD in the player, and has managed a
> credible description for each of the machine states. This is a huge leap
> when this was attempted using ChatGPT 3o.
>
> William talked about some of his 3D printing adventures.
>
> Darren talked about AI terminology, hallucinations, and what actions
> some businesses are taking to manage the process.
>
> Andrew Dean gave us an update on his latest escape-room technology.
> Also, a very interesting discussion about how the new-world is
> unraveling for his son as he moves into early adulthood.
>
> Ross talked about the fabrication of a 3D puzzle constructed entirely
> from 3mm laser-cut MDF.
>
> Michael gave us an update on his 'DIY mobile phone'
>
> Graham Talked about drilling 6mm 316 SS sheet.
>
> ===========
>
> Interesting videos:
>
> Homemade diesel lawnmower youtube.com/watch?v=wDU-X484St0
>
> Why learn to code failed youtube.com/watch?v=bThPluSzlDU
>
> Agriculture: Combine Harvester & Chieftain Tank
> youtube.com/watch?v=m1tTeRhZCt0
>
> Floppy Disk from Scratch youtube.com/watch?v=TBiFGhnXsh8
>
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