[chbot] CHCH Robotics Group, meeting notes Mon 16 Oct 2017

Brindsley Archer brindsley.archer at gmail.com
Mon Oct 16 21:07:49 BST 2017

In case any one is interested, I got the 4 ch 200MHz DDS from Aliexpress
for about U$65:

And I got the Siglent spectrum analyser from the local Siglent distributor:
Rob Annandale
Taupaki Technologies Ltd.
Ph 649 8109079  Ah.
Mob +64 212585220    tautech at ihug.co.nz
Rob's pricing was very similar to Aliexpress but he offered far better
service and value and was a pleasure to deal with.

Here is a link to a very informative tear down on Youtube:

And an interview with the CEO of Siglent:

On Mon, Oct 16, 2017 at 9:57 PM, Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Hello everyone,
> Good turnout with 21 attendees, and lots of huddles-of tech-talk. $29
> collected and transferred to BR05 account. This includes a $4
> electric-car-charging donation by Peter Harris, for his Nissan Leaf.
> The recently prompted email regarding equipment donations to the trading
> table has resulted in quite a pile of ‘new’ equipment. Just to reiterate;
> yes donations are welcome, but not CRT, printers or toner.
> With thanks on behalf of the group,
> Mark Atherton
> =============
> William talked about his latest updates to his home-made 8 bit machine.
> New peripherals include the new ‘paper tape’ reader (actually a thermal
> printed paper strip). This project is moving along quite nicely.
> Brindsley brought in his (very) portable spectrum analyser with tracking
> generator (9kHz – 2100MHz). Lots of interest in this machine, given its
> price point of around NZ$2550.
> Mark B brought in a test meter and some micro-probes (home-made based on a
> bur (similar to commercial pogo-pin test points); a very easy to method
> measure corroded-lead components, and to penetrate conformal coating etc.
> A Raspberry Pi Zero-W processor board was passed around. Quite small, and
> rather inexpensive (free with annual subscription to the Pi magazine)
> [apologies, forgotten the name of the person who did this].
> Robin talked about the ESP32 WiFi Mogoose OS, and associated ecosystem
> which has sprouted from this project. This is looking like yet another
> game-changer in terms of price, performance, and power.
> Ian talked about his experience making a magnetic gearbox.
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