[chbot] Robotics Group meeting, Monday 18 Octr 2021, 630pm, 5 Idris Road

Robin Gilks gb7ipd at gmail.com
Wed Oct 20 03:45:14 BST 2021

Synco - that Riden module, any idea if the output is isolated from the
input PSU to allow the making of a dual PSU?

Can't find any info in online reviews, maybe best to just stick a meter in


On Mon, Oct 18, 2021 at 10:34 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Hello everyone,
> Good turnout with 28 attendees, and lots of huddles-of tech-talk. $40 +
> 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 talking about his effort commissioning the
> first-article EHT power supply (the design of which had been discussed
> that the previous meeting). He also passed around some oddments
> including a SPDT water valve, with wax-motor actuator, a right angle
> Schrader valve, and a well designed mirror mount.
> William brought in and discussed upgrades he has been doing to his ‘286
> “laptop”, including the ‘287 co-processor.
> Andrew brought in and discussed a PCR automation jig he had been working
> on, in conjunction with a physician in Zurich.
> Michael talked about his efforts designing a 3kW electric furnace, along
> with some of the trials and tribulations. He also powered up a (medium
> power) air-plasma source which was able to melt copper in air (!).
> Graham brought along a steel pendant-mold he fabricated for Molten
> Media. Item had been made using spark-erosion from a graphite positive.
> Most impressive.
> Robin talked about his adventures building a Rocket-Mass Heater. Also an
> autopsy of the project. Most interesting. He also talked about a
> diamagnetic piece he found while repairing and rebuilding a small
> weather station.
> Synco talked about a cascaded power supply he has owned for a while.
> Unit is capable of delivering around 60V at 12A, and features current
> limit and a USB interface.
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