Thanks to Carl (https://twitter.com/cfkarsten) for giving intro to the world of Python and the interactive mode (REPL).
Want to learn more Python? Come to: http://wiki.pumpingstationone.org/Python_Office_Hours
Carl's efficient tour of Python from the interactive prompt was made possible thanks his utility Ripley: https://github.com/CarlFK/Ripley
It copies Python syntax from a lesson plan one at a time to save time from having to type them out:
Bonnie King showing how to add tab auto complete to Python interactive mode (it's wonderful!):
Bonnie King explained how to use the RPi.GPIO python module for input and output on the Pi.
Ed Bennett demo'd a test fixture he developed which swing an arm with a soft mallet down onto a piece of plexi glass. It is control via a GUI written in Python on the Pi.
Ed used the TkInter (http://wiki.python.org/moin/TkInter) python module to create a GUI to stop and start the motor. The motor is controlled with GPIO pins on the Pi via the RPi.GPIO python library
However, a Raspberry Pi GPIO pin can't drive the relay connected to them motor on its own, so a transistor is needed to switch the relay on and off
Ed controls the relay connected to the motor with a darlington transistor connected to Pi GPIO pin: http://wiki.bildr.org/index.php/TIP120_Darlington_Transistor
Ed controls the relay connected to the motor with a darlington transistors (on the left) connected to Pi GPIO pin: http://wiki.bildr.org/index.php/TIP120_Darlington_Transistor
My LCD twitter ticker displaying #psone312 hash tag:
Making a few improvements on my LCD twitter ticker code thanks to my lovely Atrix lapdock
Joe Walnes had the Quick2Wire interface board on display: http://quick2wire.com/2012/11/meet-the-latest-boards/
And I got my own Quick2Wire boards from Joe! http://quick2wire.com/2012/11/meet-the-latest-boards/
Joe kindly left a box of Pi clips at the space for those using the Adafruit Pi Plate and want some extra support: http://todayimade.co/items/joe-walnes-made-laser-cut-raspberry-pi-clips
Interesting sign - someone seems to think Ladyada (of Adafruit) needs more illumination... (there's actually a mural of her painted in the stairwell)