Cheaper veggie diesel…
In MAKE 03 we showed you how to make your own biodiesel, and now there appears to be a big breakthrough lowering the costs to get the esters “Japanese scientists may have found a cheaper and more efficient way to produce “biodiesel.” The renewable, vegetable oil-based fuel can be used in conventional diesel engines, which are found in about 2 percent of cars currently sold in the U.S. and in about 40 percent in Europe.” [via] Link. Also – listen to our interview with a biodiesel Maker.
Mike writes “While LED circuits are pretty simple by Make standards, they are essential to amateur astronomers. This is because red light affects the human eye less than other colors, allowing astronomers to see their gear without destroying their night vision. This article shows how easy it is to create red LED light sources and give some examples of how to use them, including map readers, flash lights and interior lights for an eyepiece case.” 
Ever wonder what an Oscilloscope is? Or how to use one? Here’s a good guide on getting starting “An oscilloscope is easily the most useful instrument available for testing circuits because it allows you to see the signals at different points in the circuit. The best way of investigating an electronic system is to monitor signals at the input and output of each system block, checking that each block is operating as expected and is correctly linked to the next. With a little practice, you will be able to find and correct faults quickly and accurately.” 
Great Instructable on making your own book wall hanging. I saw this in person a couple weeks ago, and I’m making a few as gifts for the holidays! – “Take one of the many beautiful books available at project Gutenberg and convert it into a wall sized readable book. Makes great gifts for the literary types in your life. This is the complete text of Flatlands, and how to generate and print it, at 60 x 42 inches. That’s huge! Take a look at the PDF.” 
Interesting page documenting a homemade air rifle (also check out the 
Chris writes “Remote controls are a consumption product. They fall in the floor, the get coffee spilled over them, the get stepped on (maybe not..) – and they wear out. In this how-to we will show you how to revive your remote by swapping the buttons around. Easier then you think actually.” 