[chbot] Robotics Group meeting, 5 Idris Rd, 630pm, Monday 20 June 2022

[Mark Atherton]

Robotics Group meeting, 5 Idris Rd, 6-30pm, Robotics 20 June 2022

Hello everyone,

Good turnout with 20 attendees, and lots of huddles-of tech-talk. $24 + 
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 started the evening talking about openSCAD and the effort required 
to model the G1 assembly of his home-made Electron Gun.

The 6/2(2+1) puzzle was discussed, outlining the difference between 
implicit and explicit multiplication, and the differing rules of 
precedence followed by various compute engines. Dave Jones at EEV blog 
has this one covered.

The Skiatron was touched on, a Dark CRT requiring around 8keV electron 
energy to activate. Thank you Mike for spotting this. “The Skiatron is a 
type of cathode ray tube (CRT) that replaces the conventional phosphor 
with some type of scotophor, typically potassium chloride”.

Andrew brought in a Badger 'badge' based on an Raspberry Pi 2040 CPU, 
and eInk display. Purchased from the UK, about 20 pounds.

David brought in a Car Instrument Cluster CAN-bus demo, and talked 
through some of the issues of managing these instruments.

Andrew talked about the progression of his business Code Breakers.

Peter talked about his home-made talking-resistance-machine, complete 
with E24 series quantisation. Very need project.

Michael talked about his MKII home-made (solid state) laser-cutter, as 
well has his newly built music synthesizer project.

Volker talked about crimp connectors, and associated tools.