Email me at: david_at_rowetel_dot_com
Free Telephony Project: Free (as in speech) hardware and software for embedded telephony. My particular interest is using this technology to help people in the developing world through low cost community owned telephone networks.
The Mesh Potato: The Mesh Potato is a 802.11bg mesh router with a single FXS port. Adjacent mesh potatoes automatically form a peer-peer network, relaying telephone calls through a community without land lines or cell phone towers. The Mesh Potato is designed using open hardware and software and is part of the Village Telco project. Lots of blog posts and progress updates on the Village Telco blog.
Open Source Line Echo Canceller: A popular high quality line echo canceller for Asterisk that is free as in speech. Works with any Zaptel and DAHDI compatible hardware, from humble X100Ps to multiple PRIs. Removes the need for expensive "hardware" echo cancellation. A very popular echo canceller which is part of many Asterisk and Linux distributions and is now part of the Linux Kernel!
Electric Car: My wife and I drive an electric car every day. Our EV has a range of 45km, 100+ km/hr top speed, and runs on 120V at 350A peak. We charge our eletric car from our home solar panels. We rarely use our other, internal combustion car anymore, I can't remember the last time we bought petrol! The conversion and solar panels to "fuel" it cost less than a medium size new car. Lots more information on my EV page.
East Timor OLPC Pilot: I am working with people in my home town of Adelaide and East Timor on a pilot deployment of OLPCs in two Timorsese schools.
Peak Oil: I spend a lot of time researching this subject. IMHO the biggest challenge facing the world today - bigger than climate change.
I don't have the time for these right now but would love to see them move forward - please contact me if you are interested.
WiSPCaR: Wifi Station Power Controller And Reporter. A PIC microcontroller gadget using to monitor solar powered remote Wifi stations. Parts cost is around $2!
Low Cost IT for The Blind: The Louder Router is a $200 talking computer for the blind, built around free software and commodity routers.
$10 ATA Project: Cheap telephony for the developing world using a novel $10 Analog Telephone Adaptor (ATA) design and commodity routers.
gEDA gschem/PCB: Perl Scripts for the free gEDA/PCB CAD tools, e.g. automatic updating of PCB footprints, and improved component dragging.
I blog on my projects, and occasionally on other topics such as wealth creation. Popular posts are Building an Embedded Asterisk PBX, Building a BlackfinOne, the Open Source Echo Canceller series and my philosophical rant on Open Source Hardware.
Over the past 3 years I have been done a lot of work with the Blackfin. Using the blog I have captured a lot of practical information and tips on Blackfin code optimization.
Less popular is my About page.