easiest diy fm-transmitter I came across

this is the second fm-transmitter I tried to make and this one worked.
I like it's design cause it's really simple and even a newbie is able to make a fm-transmitter that works ( even better then 2 commercial transmitters I have bought before ).

Also the rest of the site ( sorry, only in german :-( ) is very informative and you can learn a lot about how radio works ...

Here's the link: www.piradio.de

Bioethanol and Oil from Algae

There seems to be a company that offers plants and concepts for producing oil and ethanol from algae which seems a very interesting concept to me:
www.go-e85.de
(Sorry this website is only in german ...)

Office 2.0: VPN Howto: Linksys DD-WRT PPTP Mac OS X Client

Helped me to get PPTP on Mac OS X running:

Office 2.0: VPN Howto: Linksys DD-WRT PPTP Mac OS X Client

Thanks!

Cogeneration Unit For Small Households

Here is a link to a Company that produces a cogeneration unit for small households:

www.otag.de

It runs on gas (also wood pellets in future) and has a generator that produces electricity on the principle of the steam engine.

Growing mushrooms on paper and straw

Here is a simple howto about growing oysters on recycled newspaper and straw:

www.quirxi.net

Wasserstoff aus Purpurbakterien

Interesting way of producing hydrogen ( in german ):

bionik.tu-berlin.de
Isolation/Gewinnung von Purpurbakterien
www.futurefarmers.com

Software defined Radio

Interesting Stuff: "Software defined Radio":

http://en.wikipedia.org/wiki/Software_defined_radio
http://www.gnu.org/software/gnuradio/

Small scale methane digester

This great site shows how to construct a small scale methane digester for producing biogas and even has an online calculator for calculating it's size and methane output:

http://biorealis.com/digester/construction.html

If you have questions you can ask them in the online forum.

Battery welder

I would like to have one of this welders:

http://www.alaska.net/~akraven/readywelder.html

Think that's a great design ...

Bladless Disc Steam Turbine

Have found this link for a bladless disc steam turbine:

http://www.green-trust.org/2005/07/diy-bladeless-disc-steam-turbine.html

Wonder if someone already has build a working prototype ?

Green-Trust CHP: The Green Steam Engine

Green-Trust CHP: The Green Steam Engine

and a very interesting discussion about this machine here:
www.fieldlines.com

Started today

Hi,
just started today - not sure what's that gonna be ...