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FRETS.COM Acoustic guitar instrument care, repair for players, luthiers. An Inexpensive X-ray Machine. The following is taken in full from Section IX. Optics, Heat, and Electronics; Chapter 3. An Inexpensive X-ray Machine Library of Congress Card Catalog Number: 60-14286 © Copyright 1960 by C. Harry Simons of 118 Windsor Street, Kearny, N.J., is a lonely amateur scientist. As a lure Simons offers the collection of radiographs reproduced in Figures 225, 226, 227 and 228. 225 Simon's radiograph of two screws imbedded in an inch-thick block of wood. Building the Ergonomic Guitar Blog. A Curiously Complex Origami CD Case - The World's Biggest Show & Tell - art, craft, diy. With most origami models, you start with a piece of paper and move from step to step, making landmark creases and folding this part to that.

A Curiously Complex Origami CD Case - The World's Biggest Show & Tell - art, craft, diy

And this model can be folded that way. Trouble is, the American letter paper version starts out dividing the width of the paper into nine even sections; the A4 version needs eleven even sections. I could show you how that works, but it involves math and a leap of logic or two and maybe 90% of the readers will click out at that point. If you want to learn more about this, try here. The rest of you, come with me and download a crease pattern. The American letter paper version is 8½ inches by 11 inches -- this is the one you want if you live in the US or in Canada.

The A4 version is 210 mm by 297 mm -- this is the one you want if you don't live in the US or in Canada. Multi layer pedal board for guitar~ - The World's Biggest Show & Tell - art, tech, diy. MAKE: Blog: Homemade air conditioner. How to Make a Talk Box on the Cheap. Origami Club. [CK] mintyCam.

Here are a few sample images I've taken with my MintyCams over the years.

[CK] mintyCam

I'll try and update this page with new photos in the future. The picture above is a double exposure using the MintyCam first then shooting the same film through an underwater camera. Fujichrome Provia 100F film. Color photograph of a historic church in Massachusetts created with a MintyCam pinhole camera by Chris Keeney MintyCam pinhole portrait submitted by Bonnie who bought a camera from me and then kindly sent me this test photograph Here's another test photograph created by Bonnie who recently purchased a MintyCam from me.

The above pinhole by Steven M Bumgardner a.k.a. The MintyCam pinhole above was created by Steven M Bumgardner a.k.a. Thanks Macro, it's good to see you're getting out and enjoying the camera. Misc. Pinhole & Camera Maintenance Since the pinhole size in the MintyCam is so small (.007") it's important to keep it clean. Camera Updates and Improvements. Dirkon - The Paper Camera [] During the 1970s, magazines published in Communist Czechoslovakia were controlled by the state, like the majority of other enterprises.

Dirkon - The Paper Camera []

Very few good magazines were available and were difficult to get hold of, so people would borrow and exchange them when given the opportunity. This also applied to magazines aimed at young people, which was probably one of the reasons why almost everyone from my generation, when we get on to the subject of pinhole cameras, has fond memories of the cut-out paper camera known as Dirkon*, published in 1979 in the magazine ABC mladých techniků a přírodovědců [An ABC of Young Technicians and Natural Scientists].

Its creators, Martin Pilný, Mirek Kolář and Richard Vyškovský, came up with a functional pinhole camera made of stiff paper, designed for 35 mm film, which resembles a real camera. It may not be the most practical of devices, but it works! A few notes about the original instructions The instructions recommend using Foma 21° DIN film. Lighthouse in a Tree. Instructables: step-by-step collaboration. [CK] SPAMera. How To: DIY $10 Macro Photo Studio. Today we are going to learn how to build a DIY light tent for product photography, for next to zero cost.

How To: DIY $10 Macro Photo Studio

Even saying it costs "$10" is a bit of a stretch, because you can probably build this mostly for free. The ten dollars assumes you cannot scrounge a cardboard box and some white tissue paper you have saved in the gift-wrap supplies box. You can get this stuff at an office supply store, but it is more fun to scrounge. Besides, we are all about re-use and recycle here at Strobist. (I can proudly report that 98% of my bad jokes are recycled!) If you have this stuff, the only thing you will need to buy is two sheets of posterboard - black and white.

Some Basic Theory Small flash gear is especially well suited for shooting macro shots and other small-object still life and product shots. This project is basically a light tent, albeit a very controllable one. This is one of the most useful DIY gadgets you could make - especially when you consider the price tag. What can you use it for?