DorkbotPDX 0x09

poster

Dorkbot PDX would like to welcome you to the latest installment of our semi-regular presentation series:

DorkbotPDX 0x09

(zero-based)

  • When: Monday, June 18th, 2012 - 8pm
  • Where: Backspace (map)
  • Who: All ages -- open to the public
  • Cost: Free!

What's happening? Two great and inspiring talks!

LAMOSO

Christi Denton

The LAMOSO (LAsar/MOtion/SOund) is a MIDI controller; that is, it's a device that sends MIDI to my computer. MIDI is a standard music protocol that allows electronic musical instruments (e.g., the LAMOSO) and computers to communicate with each other. It's not audio - it's digital data that includes values for pitch, length, volume, etc.

So... the LAMOSO uses lasers and photogates to send signals to a computer, which then turns that data into sound.

The lasers hit (or don't hit) photogates. The photogates connect to a Teensy++, a "microcontroller development system" (it's the computer chip thingy in the pictures), and that sends my computer data about whether there is or is not a laser beam light hitting the photogate. Max, a music programming language, is used to interpret that data into music.

Visually and musically, what this means is that there's lasers crisscrossing an area, and when those lasers are broken, it changes the music.

Digital Painting

Jeremy Rotsztain

Jeremy Rotsztain writes software to generate digital images that closely resemble
paintings. Instead of working with paints and pigments, he prefers to use digital materials. He collects popular images from the Internet and iconic scenes from Hollywood films -- and uses their pixels and sounds to generate entirely new
compositions.

Jeremy will be presenting and discussing two recent works:

1) "Obsessions" (prints made from photos of adorable pets)

2) "Action Painting" (abstract expressionist animations made from high octane car chases, violent punches, fiery gun shots, and sublime explosions).

OpenDork

You!

An open-mic session for those looking to show off a project, ask a question, solicit help, or incite collaboration.

ARM LCD Development Board

This is a ARM LPC1343 development board with a nice 132x162 16 bit color TFT LCD display, a microSD card, USB and LiPo recharging. I used it as a name badge at the San Mateo Maker Faire this year.

SensorServer Records Eclipse

I've recorded today's solar eclipse with a CdS photocell tapped to my shop window. The voltage divider feeding Teensy's ADC favors dim light so I'm actually surprised to have seen the event. Clouds have got to be pretty dark to show up. The eclipse was darker.

[1]

The data shows totality at 6:15 pm. I sample at five minute intervals.

Kudos to Don Park who suggested I take a look at this. I'm wishing I'd tuned the sensor up to get more and better data. When's the next eclipse?

El Wire MIDI Control

Last week I wrote firmware to control el wires by MIDI.

Hand-Eye Supply will be using it for their float in this year's Starlight Parade.

"Read more" for details....

Help Wanted with 8x8 LED Matrix Alpha-numberic Morse-code Display w/ sound

The IDEA is this:

taking an 8x8 LED Matrix... having it display a letter in a 5x5 section of the display(top left corner lets say) then displaying below it the corresponding Morse-code - . - where 2 leds == a dash, 1 led == a dot, and then a blank led to separate each dash/dot... then hooking up a small speaker to out put the Morse-code audibly...and scroll through the alphabet and digits 0-9 prefer using a Teensy as it would make a nice smallish package :)

Really just need help with how to write the sketch to display the different parts together all at once...

--Huck

Fire Test Using Kinect

Bus Pirate, Built At Home (Hand Soldered)

Scott tested and programmed my hand-soldered Bus Pirate at the meetup last Monday. Apparently it works. Not sure when I'll actually use it, but nice to know it'll be ready to go....

Just wanted to post a high quality photo of the Bus Pirate board, Dorkbot PDX version.

Thanks Greg, Scott, Jim, Monty, Jared, and everyone else who had a hand in making this happen! :-)

Building the Bus Pirate at home

I delivered some Bus Pirate kits at the last DorkbotPDX meeting and I'm about to ship the kits to those that mail-ordered them. So I figured you might find some instructions helpful.

ShiftMatrixPWM Arduino Library Test

Thanks to Russel for this awesome battery, and of course Elco Jacobs for writing ShiftMatrixPWM.

Kinect Cat Sequencer

I went to the DorkbotPDX Open Lab today (Feb 26th, 2012) at ADX and sat down to play with the Kinect I got a while ago. The result is a "Cat Sequencer" that uses the Kinect to trigger samples. There are two looping samples and one non looping sample. The trigger areas for the samples have been placed around the plates. They are visible on the computer as cubes. The more solid the cubes the more filled the trigger area is. Once the trigger is filled enough, it plays a sample. Read on for more details and code.

Kinect Cat Sequencer from Brian Richardson on Vimeo.

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