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Systems thinking on the biohumanosphere.

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Jonathan Soroko, 1958-2013
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exceptionally simple solar heater – built from recycled materials

Here’s a design for a solar heater built entirely from recycled materials

. Might be worth having in an emergency – seems to be easily made, and quite portable.

Via Cynical-C.

This entry was posted in Solar on May 2, 2007 by Jon.

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Why We Blog

Systems thinking on energy and environmental policy, public health, terrorism, social networks and risk. We believe these issues are all inextricably linked.

Our Favicon

Our "favicon," the small image which generally appears in the browser address bar or on tabs for a given site, is the International Code of Signals (ICS) flag which stands for both the letter "K" (KILO in the NATO alphabet), and for the message "I wish to communicate with you."

The same messages can be communicated by signalling the letter "K" in Morse code via signal lamp. (While a proper signal lamp may be ideal, a flashlight, probably best employing red LEDs, will certainly fit the bill).

RFCafe.com Edited by Kirk Blattenberger

Encyclopedic and accessible information about all matters electrical, electronic, and wireless.

Banner Image by Randa Clay

Our banner image was designed by the always-amazing, never-satisfied-with-her-own-work Randa Clay. Her work can also been seen and read at Solutions for WP, HomeSchool Hacks, and elsewhere.