Author Archives: Bob

Pinch valve details

This gallery contains 4 photos.

Pinch valve: Gear motor rotates lead screw, moving nut (and attached slide gate) up and down. Lowering the gate pinches 1″ I.D. Silicone rubber tubing shut. Raising it, opens the valve. The L298N H-bridge motor controller provides a simple inexpensive … Continue reading

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Protected: Biorealis/Thai Digester Project

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How to make ethanol

This video shows how to make 100% ethanol from sugar using a table-top electric distiller.  (Idea: I could measure the energy input using a kill-a-watt meter.).  It produces (using 4 distillation runs) ~92% ethanol, then shows 3 methods to get … Continue reading

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Arduino stepper motor controlled slurry pinch valve

Motorized Pinch Valve Some ideas for a motorized pinch valve using a geared stepper motor controlled by an arduino (for example. or PLR? or raspberry pi?). Need to design and print mounting brackets, gearing mechanism, linear actuator, etc. Design parts … Continue reading

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Arduino stepper motor controlled slurry pinch valve (Older)

Some ideas for a motorized pinch valve using a geared stepper motor controlled by an arduino. Need to design and print mounting brackets, gearing mechanism, linear actuator, etc. Design parts in (e.g.) Autodesk fusion 360, print on 3D printer. One … Continue reading

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Protected: Biorealis/KRAAFT Digester Project

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Serenity Gardens Eco-village Plot Plan

Here is a link to a plot plan (1 MB pdf) of Serenity Gardens Eco-Village. It was current as of November 2013. SGEV for FB

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SGEV Gray water treatment

A good greywater recycling page — general info and links to other systems: http://greywateraction.org/content/about-greywater-reuse Another good graywater resource: http://www.greywater.net/ Artificial aquifer Tube Well: A way to filter pond or surface water: http://www.povertyenvironment.net/sites/default/files/pep-files/Artificial%20Aquifer%20Brochure.pdf Engineers without borders: A good page full of … Continue reading

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SGEV Utility Guidelines Updated

Clause 3 – Utilities and Energy Plan UPDATE: Jan 30, 2014: ICE power is now available at the lower end of the property and will be extended up along the main road to the community center. As time goes on … Continue reading

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Battery technologies Li-ion vs Lead-Acid

A good article from HomePower: Lithium-Ion Batteries for Off-Grid Systems Are They a Good Match? By: Randy Richmond Issue Date Dec 16, 2012 For decades, lead-acid battery technology has been the mainstay of battery-based renewable energy systems, providing reliable storage … Continue reading

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