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Welcome to my project site.

My name is Davetech... well, not really, but that will have to do.

This site was begun on October 14, 2007.

I plan to update it regularly, since I have several on-going projects which I think may be of interest to others.

Please note that I do not want for an instant to pretend to be an expert at home metal casting or any of the other projects I may post here. This is the first time I have attempted to build these contraptions and I am sure there are better ways of doing it. I am just showing the way -I- did it, using what little cash I have available and what ever I find in my junkpile.


Project #1 - A mini electric kiln -

(To test my refractory mixture)


Project # 2 - My backyard Foundry -

( up and running ) - - -


( up and running ) - - -

with Performance Observations -

I've been threatening to build a solar powered preheater for my tankless water heater for some time now. The weather is better now and I've finally started building, but I don't have enough finished to present here yet. Won't be long though.

What I've gotten done: Moved my old gas fired water heater off the back porch back to it's original position and plumbed it into the feed line to the tankless heater. It will be used as a holding tank for the preheated water. Built a solar "hot box" plumbed with 1/2" cpvc tubing, painted black and glazed. Measured temp in it at 160 degrees F on a mild sunny day. The cpvc is rated to 180 degrees so I hope it will hold up. Dug a ditch from the house out to where I plan to mount the "hot box" collector. The ditch will have the supply and return line deep enough that it won't freeze in winter. Trying to locate a low wattage, inexpensive pump that can withstand supply level water pressure to circulate the water from the collector to the holding tank. (Would love to have a small sterling engine capable of doing the pumping, but building one of them may be beyond my capabilities.)

March 29, 2009 - bah! The weather has been rain, rain, and more rain... so since I couldn't work on the preheater, I added a page on how I supplied my little Scandinavian wood stove/heater with fresh outside air.

( up and running ) - - -



More projects to be presented very soon. Please check back.



 Coming soon! To a computer near you!

Project # 5 - Waste Oil Furnace -

  ( Still under consideration ) - - -



Shop Visitor -

Last night (Oct 15,2007), I was cutting a 16" hole in a piece of 1/2" plywood with a hand held jigsaw, making quite a racket, and this big, beautiful black snake just slithered right in through the window, right beside me, apparently oblivious to my presence.

I have no snake phobia and just smiled when I saw his head and first few inches out of the corner of my eye. But he just kept coming and coming... "Dayam! He's long... and he's big!" So I grabbed my camera and started shooting.

He totally ignored me except when I held the camera for this shot about 4 feet from him. Then he just froze until I moved away again. Then he continued on, hunting I guess, as if nothing had happened.

It looks like he has recently eaten (see the bulge?) so he might have been looking for a warmer place for a snooze. But he checked out all the rafters overhead ("psssttt... the mice live in that big cardboard box over there with the shredded newspaper!") and then he left the way he came in.

Never did get a good look at all of him stretched out, but he was at least 7 feet long! (notice that the tip of his tail is all the way over at the right side of the picture).

I'm not sure but I think he is called a Black Rat Snake.



Got a question?

Davetech is a member of the forum at,8.0.html

and you can contact him through the forum private message mechanism.


 Most interesting:

"Linnard´s hydrogen on demand system without electricity"

That's right, this device produces a fair amount of HHO without any external source of electrical power. It produces its own current to keep the reaction going. This is not pie-in-the-sky, hit-and-miss theory. It works. The chemicals and electrodes replenish themselves during various stages of the reaction and just water is consumed. The zinc electrode does not replate itself 100% though and ResinRat2 has been working diligently to find a way to make it do so.

When I can afford the chemicals, I plan to build this device myself, only much larger. Zinc is cheap.

<-- This thread is a good read, but pack a lunch!


The thread started on October 4, 2005. Research is on-going and the thread remains active.


Many Thanks for your hard work and determination, ResinRat2

My hat is off to you!


You can also e-mail me @



updated April 02, 2009


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