Ed_B's blog

Add a Flash Movie

Submitted by Ed_B on Wed, 02/17/2010 - 20:44

Here we are, adding a movie. It is 400x300 and 15Megs maximum. This isn't the normal way.

First, we'll upload a Flash movie as an "flv" file: BenCassieSp08.flv

The upload flash button is here:

Click the Upload tab in the pop-up browser, then upload your file.

Preparing videos on linux

Submitted by Ed_B on Wed, 02/17/2010 - 18:02

#!/bin/bash -x
# mov-to-flv.sh

# works only with older versions of ffmpeg
# Useful for converting a folder of MOv's to flash & preview png's # makes two folders: flv's and previews
# put quicktime files in a folder then run this script

Flash Test 3

Submitted by Ed_B on Tue, 02/16/2010 - 17:09

Open source player evaluation - player_flv_maxi.




Submitted by Ed_B on Sun, 12/20/2009 - 19:08

test this


PCF8575 I2C port expander

Submitted by Ed_B on Tue, 12/15/2009 - 18:29

A port expander gives you more i/o from an MCU by using a small amount of i/o in clever ways. A typical application is to run 128 LED's from an Arduino. 

ArtBus H-Bridge driver schematic

Submitted by Ed_B on Wed, 12/09/2009 - 14:49

Here is the schematic for the AVR atmega168 based ArtBus board. The firmware is almost at beta. More on that soon.

ArtBus boards back from the factory

Submitted by Ed_B on Sun, 12/06/2009 - 16:24

Well, here it is. I'm embaressed to say that the design worked the first time. That never happens! But it is a relief.


If there's any single trick to getting a board so that all the parts fit, it's the paper model trick. Here's the almost last revision before going to press.

ArtBus board with Arduino code

Submitted by Ed_B on Tue, 11/24/2009 - 19:36

This is pre-alpha code for the four-channel H-bridge controller which is the subject of the earlier postings on Kicad. When it gets more to late alpha (hopefully in the next day or two) it'll look rather different.

Alternative Energy for artworks

Submitted by Ed_B on Wed, 11/18/2009 - 00:24

I was asked to do a survey of possible alternative energy sources for powering electronic art. The scope of the terms was wide open, so of course a comprehensive overview was in order! Follow the link below to Alternative Energy Sources for Powering Electrically Activated Artworks (AESPEAA).

avrispmkii, Karmic Koala usb problems

Submitted by Ed_B on Tue, 11/03/2009 - 18:19

The last thing the makefile in http://www.kineticsandelectronics.com/node/54 does is burn the AVR chip using the avrispmkii programmer.

If I did "sudo make" to do the compile and burn as root, the program would burn just fine. Otherwise I got errors from avrdude (the linux program that runs the avrispmkii) about not being able to get information from the chip or the programmer, or that the programmer wasn't there, or that I didn't have permission to use it.

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