Hackspace Hack Evening #20: Wednesday 2nd December

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Russ Garrett

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Nov 23, 2009, 5:27:09 AM11/23/09
to London Hack Space
Our next hack evening will be next Wednesday, the 2nd of December at
the Hub in Islington from 7pm.

Chris will be running the workshop on PCB design which had to be moved
from last week. As usual, we'll have our box of electronics bits and
pieces, as well as the customary beer.

More details on the Upcoming page:
http://upcoming.yahoo.com/event/4558788

And full details of The Hub on their website:
http://islington.the-hub.net/public/

Cheers,

Russ

Russ Garrett

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Dec 2, 2009, 5:34:36 AM12/2/09
to London Hack Space
Just a reminder that the next hack evening is tonight!

Come along for our workshop on PCB design, to work, or just for the
beer :)

More details on the Upcoming page:
http://upcoming.yahoo.com/event/4558788

Cheers,

Russ

andrewblack

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Dec 2, 2009, 6:03:23 AM12/2/09
to London Hack Space
I am planning to come tonight. I am a software rather thand hardware.
I plan to do a bit of hacking on google maps API so if anyone would be
interested in haveing a look at what I am up to..


Andrew
(not been before so say hello when I turn up)


Chris McClelland

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Dec 2, 2009, 6:15:50 AM12/2/09
to london-h...@googlegroups.com
Just a bit more info about the PCB workshop this evening:

I will work through the design, schematic capture and layout of a simple
little microcontroller project I created especially for this workshop,
called the "Nanduino" (as in very small Arduino). The PCB measures 30mm x
35mm and incorporates an Atmel AT90USB162. It comes factory-programmed with
a USB bootloader. You can write code for it and upload it over USB using
freely-available tools, and since the micro's USB peripheral is a
general-purpose full-speed (12Mbit/s) USB device, you can program it to
enumerate as any of the common USB device types (e.g keyboard, mouse,
mass-storage, MIDI I/O, RS-232, audio I/O) in addition to custom USB device
types using Dean Camera's excellent LUFA library
(http://www.fourwalledcubicle.com/LUFA.php). The total cost of materials (if
you're interested in making one) is about �5. I will bring a working board
to demo code upload and to show it working as a five-button USB keyboard
(woo!).

All PCB design work will be done using the freeware version of Eagle,
available for common platforms here: http://www.cadsoft.de/download.htm.

The workshop focuses on design constraints for home-etched PCBs. We have the
equipment necessary to do this at the space on Barnsbury Terrace. I will not
cover commercial PCB fabrication in detail since I have only limited
experience there. Furthermore, whilst I can talk about the *process* of
home-etching, it's not something I can readily demo at the Hub, but there
are some pics of the progress of etching the Nanduino here:
http://www.makestuff.eu/nanduino.

* The first pic shows the board after having been UV-exposed and developed.
The combination of UV-exposure and the developer chemical has removed the
etch-resist from the lighter areas of the board, but note the overall
coppery colour remains, even in the lighter areas.

* The second picture shows the board after etching. The etchant has
dissolved the copper in the white areas, leaving metal behind for tracks and
pads.

* The third picture shows the board after drilling. This is the most boring
bit (hence my preference for surface-mount components!).

* The fourth picture shows the beginnings of my poor efforts at soldering.

Hope to see you there this evening!

- Chris


--------------------------------------------------
From: "Russ Garrett" <ru...@garrett.co.uk>
Sent: Wednesday, December 02, 2009 10:34 AM
To: "London Hack Space" <london-h...@googlegroups.com>
Subject: [london-hack-space] Re: Hackspace Hack Evening #20: Wednesday 2nd
December
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