years ago, I saw plans for a DIY vaporizer... long before I'd ever seen or heard of one at a head-shop or the like.

The idea was basically like a bong shaped tube, with a car cigarette lighter element with a push button activation, modified and setup to replace the bowl. Instead of lighting it up, you filled the removable bowl that mounted directly over the heating element. You sucked on the tube and the smoke was pulled down and into the bong-like chamber (no water was used, citing danger of electrical shock) between the element and the bowl and up into your self.

If you used the heating element control button carefully, you would only burn the crystals, leaving the veg matter slightly crisped but not burnt. I could be wrong, but I believe this was the beginnings of the evolution of vaporizers Volcano/Caveman style, if you will.

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