Open Source Ecology - User contributions [en]

Talk:Car

2014-02-07T21:57:51Z

Catprog: /* OS vehicle */ new section

==c,mm,n==

The "c,mm,n" project is another open-source car project which actually made it to the prototype stage. http://www.cmmn.org [[User:Traroth|Traroth]] 01:50, 22 December 2011 (CET)

== OS vehicle ==

http://www.osvehicle.com/ is another open source car

LED growlights

2013-08-24T02:57:37Z

Catprog: added another source for leds

{{Category=Controlled-environment growing}}

'''Advantages''': Researchers report approximately 40% yield win from using LED lights<sup>[http://www.greenhousecanada.com/content/view/1562/38/]</sup>. They use about a tenth the energy of high-pressure sodium lights.

'''Life''': LEDs last about 50,000 hours. Plants grow best with 16 hours light a day - that's 16 hours total sunlight + LED light. The amount of sunlight obviously varies depending on climate and latitude, but if you lived in a cave, you'd be using the growlights 16 × 365 hours a year: 5840 hours a year so they'd last 8.5 years. Factoring in sunlight, they should last at least 20 years.

'''Color''': Plants need a mixture of blue (wavelength of 458nm) and red lights (wavelength of 640nm), with the red lights about six times brighter than the blue.

'''Brightness''': Plants need about 30,000 lux (lumens per square meter)

'''Commercial growlights vs DIY''': [http://www.google.com/products/catalog?&cid=1937589986051591870&ei=VQhZTeSED82WhQeQ1fDcDA&sa=X# This] is a commercial growpanel with 225 LEDs for $34 plus shipping. It may be cheaper to buy loose LEDs.
# Here are [https://www.kingbrightusa.com/product.asp?catalog_name=LED&product_id=WP63SRD Red LEDs for 9c each] at a brightness of 0.3 lumens. [https://www.kingbrightusa.com/product.asp?catalog_name=LED&product_id=WP5603QBDL/SD/G Blue LEDs for 41c each] at a brightness of 1.5 lumens.
# [http://www.aliexpress.com/item/5m-300-LED-3528-SMD-12V-flexible-light-60-led-m-LED-strip-Waterproof-IP45-white/1081661055.html] has 5m led strips for $7.88

Large High-Output LED Array for
Plant Growth slidshow by orbitech
[http://docs.google.com/viewer?a=v&q=cache:y2J4wNlxck0J:www.lssc.nasa.gov/als/ncera/Session%2520D/Morrow%2520NCERA%2520101.pdf+nasa+red+and+blue+leds&hl=en&gl=us&pid=bl&srcid=ADGEEShaMXyXF87HRJiYvdLdMtTaHOJ1bL-PFM4R1jTvDDWKOcvfyslTvevjDS5NTJhFd5RRAJbfhjXNpQteyf9lLgXgzJEQfhJw9su3xLDUFTgFUY5DYYruExNxvD3RBLYhDOC6Sf2_&sig=AHIEtbSbFMSDmZur_wv3fOONSlyBFFrfYw]

Talk:Drill Press/Research Development

2012-08-09T06:19:53Z

Catprog: Created page with "Would this book be of any help? http://www.amazon.com/Drill-Press-Build-Metal-Working/dp/096043304X/ref=sr_1_8?s=books&ie=UTF8&qid=1344493118&sr=1-8&keywords=Build+Your+Own+Meta..."

Would this book be of any help?

http://www.amazon.com/Drill-Press-Build-Metal-Working/dp/096043304X/ref=sr_1_8?s=books&ie=UTF8&qid=1344493118&sr=1-8&keywords=Build+Your+Own+Metal+Working+Shop+from+Scrap

Talk:Sun-tracking

2011-07-28T13:16:54Z

Catprog: /* Combo Tracker? */ new section

I would also recommend including content about passive solar tracking, as this eliminates both electronics and motors from the equation, and makes solar tracking possible with relatively basic materials. See the zomeworks tracker for details on this method: http://zomeworks.com/products/pv-trackers. Electronic solar trackers can often provide a 100% increase in photovoltaic efficiency, and passive trackers provide between 45% and 85%, depending on a number of environmental factors, foremost being wind.

However, since they have very few moving parts, and rely on gravity + evaporation to track the sun, they require almost no upkeep. Compared to electronic/motorized trackers, these guys are the epitome of lifetime engineering.

== Combo Tracker? ==

Could you do both, calculate where the sun should approximately be and then use feedback to accurately place it? [[User:Catprog|Catprog]] 15:16, 28 July 2011 (CEST)