[chbot] Robotics Group meeting, Monday 20 Sept 2021, 630pm, 5 Idris Road

Trevor Wignall zl3adz at gmail.com
Mon Sep 20 11:23:08 BST 2021

As I was locking up after the meeting tonight, I discovered a "Spigen"
tablet had been left on the front desk. After a bit of discussion with
Henri, I decided to take it home. If the owner would like to contact me
directly, we can arrange to get this back to where it belongs - and yes, I
can guess who the owner is.

On Mon, Sep 20, 2021 at 9:40 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Hello everyone,
> Good turnout with 22 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, 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 started the evening describing a variable, regulated 2kV power
> supply he had designed, based on a 1300V/6W backlight transformer
> intended for powering CCFL tubes.
> William talked about his 30-year-old 286 laptop refurbishment project.
> Work included replacing the RTC/RAM module with embedded power cell,
> fitting an SSD (heresy!), and adding network connectivity. All in all, a
> splendid hernia-portable compute-unit.
> Graham Christie presented a puzzle on behalf of his son who is looking
> for a (some ?) Arduino mentor(s). Several members present put their
> hands up offering assistance.
> Russell showed his PCB based implementation of a gray-coded disk. He
> also talked about a BLDC conversion of his previous brushed-motor driven
> solar-tracking system. He passed around some low-cost high torque BLDC
> motors, with and without onboard controllers.
> Andrew brought in his multi-user location-sensitive interactive game he
> has been working on (along with an amazing promo-video). He also gave a
> demo of some of his latest smart LED products and components.
> _______________________________________________
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