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Home made jelly on the window sill.
When I first thought of making jelly, I didn't realize that it was a definite challenge and art. When I visited with Eppel Beard, she made it look so easy. She gave no hint that it might be hard to make a perfect clear jelly with the colors vivid and beautiful that when taken from the jar would hold its shape. But when I tried to make jelly on my own for the first time, I chose a fruit low in pectin, put too much sugar in it and didn't cook it long enough. It turned out like syrup. I tried again and cooked it too long. When it hardened it made a very good candy. Soon I found my mistakes and tried again and it turned out all right.

Like most people, I had thought that it wouldn't be very hard to make jelly because I reasoned, all I'd have to do was follow the recipe on the box of pectin. But Eppel said the real challenge is to make jelly like women did before the age of packaged products and commercial pectin, when they depended on the natural pectin and acid in the fruit.

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FBP Nutsy

Nutsy, the modified Universal Nut Sheller for home use.

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Community action news / Hot topics

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Street Party Table.jpg
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Blog

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Joshua M. Pearce
Do something.               

Aleiha's parabolic solar cooker
In physics, energy is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems. Since work is defined as a force acting through a distance (a length of space), energy is always equivalent to the ability to exert pulls or pushes against the basic forces of nature, along a path of a certain length.

Sustainable energy is the provision of energy that meets the needs of the present without compromising the ability of future generations to meet their needs. Sustainable energy sources are most often regarded as including all renewable energy sources, such as hydroelectricity, solar energy and power, wind power, wave power, geothermal energy and power, biomass fuel and energy, and tidal power. It usually also includes technologies that improve energy efficiency.

While many renewable energy projects are large-scale, renewable technologies are also suited to rural and remote areas, where energy is often crucial in human development. As of 2011, small solar photovoltaic (PV) systems provide electricity to a few million households, and micro-hydro configured into mini-grids serves many more. Over 44 million households use biogas made in household-scale digesters for lighting and/or cooking, and more than 166 million households rely on a new generation of more-efficient biomass cookstoves.

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Engr305 Appropriate Technology Projects: Below are selected service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.

Chris's ENGR305 Solar Food Dehydrator

A hybrid, solar food dehydrator  
Compressed earth brick press

An exploration of compressed earth bricks  
Deidre's vertical vegetable garden

Solar powered vertical vegetable garden  
Devan's vertical axis wind turbine

Experimental Vertical Axis Wind Turbine  
Engr305 peanut sheller project

Peanut sheller made from clay and newspaper  
Engr305 pulser pump

A working model of a Pulser pump  
Engr 305 solar learning station

Instructional Solar Learning Station  
ENGR305 windbelt

Testing new materials for prototype windbelts  
Ethanol from organic sugar beets versus refined cane sugar

Determining the cost inputs and energy outputs of small scale ethanol production  
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New pages being developed:
  1. Athena Syringe Pump
  2. Design of Post-Consumer Modification of Standard Solar Modules to Form Large-Area Building-Integrated Photovoltaic Roof Slates
  3. RF diffuser literature review:MOST
  4. Chemical resistant of 3D printable polymers: experiments
  5. Chemical resistance of 3D printable polymers: experiments
  6. Presentation.pdf
  7. Wood Furniture Waste-Based Recycled 3-D Printing Filament
  8. Non-assembly of a 3D-printed Auger extruder for UV-sensitive materials
  9. Seawater Power Station
  10. 3D pringting chemcial etching handle

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