[chbot] Robotics Group meeting, 5 Idris Rd, 630pm, Mon 21 Apr 2025 report

[Robin Gilks]

Another interesting YT video
https://www.youtube.com/watch?v=UQuIVsNzqDk
Not that I'm a total fan of Mary Poppins (Steph knows the whole script by
heart!!) but Disney did have some interesting tech back in the day

On Mon, Apr 21, 2025 at 9:56 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Hello everyone,
>
> Good turnout with 23 attendees, and lots of huddles-of tech-talk. $38 +
> 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
>
> ----------
>
> Mark talked about a home-cooked PT100 temperature sensor interface, and
> some of the associated design issues.
>
> He also mentioned was a new class of FET rated at 375A in a package
> 7x9mm, with RDSon type 0.35mΩ; package limited at 375A. Single unit
> pricing NZ$6.57.
>
> Robin talked about how the walnut industry was driving him nuts with the
> recent rain.
>
> Grant talked about his business product, the 'FieldMate electric drive
> system for seed drills’.
>
> Graham talked about a visit south, and associated time spent with a
> ‘meteorological balloon launching technician’.
>
> David talked about the X-ray inspection of one of Graham's radiosondes.
>
> Andy brought in and talked about his Pressure Swing Adsorption oxygen
> generator
>
> Charlie talked about an embedded coding project for an LED based science
> exhibit.
>
> Dave talked about his high-power, room-filling smoke generator
>
>
> Interesting YouTube Videos:
>
> The great 2002 electrolytic capacitor crisis
> www.youtube.com/watch?v=rSpzAVpnXo4
>
> Mr Hewes, and how (not to) test a Cheiftan gearbox
> www.youtube.com/watch?v=ajOSkgd2-H8
>
> An insane Boeing 7779X ‘model’. Looks like a mix of AI an real images,
> but the real stuff is quite impressive.
> www.youtube.com/watch?v=PXZXRhau9Jo
>
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