[chbot] Bevin’s mechanical calculators

[william fleete]

https://youtu.be/cRGu1OBFPrc here’s a link for one of the calculators on CuriousMarc’s YouTube channel, one of his more basic ones, if you go through some of his older videos there is an electromechanical one

https://youtube.com/playlist?list=PL-_93BVApb58cdHy3Z2sUWtd6q2LsmO2Z Here’s a playlist of all the calculator related videos

Sent from my iPad

> On 19/09/2022, at 22:29, Mark Atherton <markaren1 at xtra.co.nz> wrote:
> 
> Hello everyone,
> 
> Good turnout with 22 attendees, and lots of huddles-of tech-talk. $31 + 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 progress repairing, and learning about the Grass Valley digital-video switcher. He also discussed the issue of PCB layout congestion, and strategies to deal with the problem. Finally, he talked about the Thunderbolt interface, and its relevance with a recently acquired baseband-video acquisition unit.
> 
> Charlie talked about installing Linux on an Android device. Initial investigation included using a VM under Android, and using CHROOT to change apparent root directory.
> 
> Bevin brought in and demonstrated two 1950s vintage 110V-powered electric calculators. Amazing use of several thousand pieces of bent sheet-metal.
> 
> Andrew Dean talked about further adventures at Code-Breakers, as well as keeping the kids at school (where he works) interested in fabrication with the help of laser and plasma cutters.
> 
> David talked about his working, homemade HF regen RX, and the problem with a counterfeit audio amplifier IC.
> 
> Graham talked about issues re-creating a spoiler for a Mclaren racing car using fiberglass. He talked through various issues when trying to produce a fine finish using different-chemistry fillers, and pigments.
> 
> 
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ourshack.com/pipermail/chchrobotics/attachments/20220924/37f7310b/attachment.html>