Brown Oxide I Perm Red S Hansa Yellow AXN Lamp Black B Magenta M Medium Yellow T Raw Umber L Red Oxide F Thalo Blue E Thalo Green D White KX Yellow Oxide C

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The Osram LUW CP7P-KTLP-5C8E-35-Z is a rather inexpensive LED with some fairly impressive specs. Digikey pricing is $2.47 at 1200 piece quantities. The specs are the following; 109lumen at 350mA 243 lumen at max current 1A (assuming one can keep it cool) Viewing Angle 80 deg Color: Cool white, 6500K Size 3mmx3mmx2.23mm high A full [...]

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Canon EOS EF Lenses from film cameras can be used in Canon digital cameras which use EF-S lenses… sort of. They are not 100% interchangeable. A couple bid deal issues which must be considered. EF lenses from Canon film cameras will work on Canon digital cameras that use EF-S lenses, the reverse however is not [...]

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Here is the block diagram for the long wave IR theremin design. A full size expanded version is available by clicking the image. IR Sensor Discussion The IR sensors are an array of thin film Bismuth-Antimony thermocouples surrounded by Xenon gas. Active junctions in the center of the detector receive radiant energy through a thin [...]

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The detector mounts are ready to roll but the it is getting more than a bit cold outside, so here goes the theory of operation and block diagram section. A simplified view of the long wave IR detector is shown in figure 1. The background radiation is ever present, and the detector is mounted in [...]

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The traditional theremin used a couple oscillators, a reference one, and another one was controlled via physical proximity. The difference frequency between the oscillators was then sent to an amplifier, whose volume was controlled by yet another set of oscillators. In the 1920′s such an instrument was no doubt difficult to build. In our time [...]

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Broken studs can be a real nightmare, even more so because more often than not, they end up in locations where its near impossible to get at. The traditional approaches of drilling out the stud, and then using an ez-out or other broken stud extraction tool often fail. Sometimes they mere strip out, which inevitable [...]

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The case of an inadvertent transformer winding… A new large turbogenerator in a UK power station was designed to have its 20kA three-phase output busbars split either side of one of its support pillars, because of a lack of space. The support pillars were steel, part of a steel framework, and created a single-shorted turn [...]

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One of the headaches of dealing with high temperature materials, is not that they are not available, but more so, that its often impossible to buy them in non-oem (original equipment manufacturer) quantities and/or lead times. However, if one steps back a bit, and looks not so much at the oem world, but the mro [...]

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I came across the following from Home Shop machinist and it looks to be a really cool tool for identifying aluminum alloys. Granted, I have yet to verify this myself… on the other hand, the author very much seems to know what he is talking about based upon other threads. Rather than using the image [...]

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