Author: iopadmin

  • Revised Raspberry Pi TrueCrypt Benchmark

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    Revised March 31, 2013 with updated benchmarking approach that uses actual access to the mounted volume. New results show no appreciable sensitivity to hash, which is as expected. The numbers are for encryption only (write). I have not pursued read. Hash Algorithm Encryption Algorithm Rate (MB/s) SHA-512 Twofish 2.8 Whirlpool Twofish 2.8 RIPEMD-160 Twofish 2.8…

  • Raspberry Pi TrueCrypt Benchmark

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    iopadmin
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    Note: The results in this post have been improved with more accurate values at Revised Raspberry Pi TrueCrypt Benchmark. I recently acquired a Raspberry Pi model B 512 MB from the excellent people at Adafruit. I am interested in it as a small computer for basic text processing, and am curious about its performance in…

  • Bespoke Monitor Stand

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    I’m using two reams of paper to hold my monitor at the right height. These reams are totally functional. However, I’m trying to learn to make passable hand-cut dovetail joints and I had material from an old keyboard tray that does not fit with my office’s new furniture. As a tangent, before starting this project…

  • Big Centipede

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    Last August my son’s school started the year with a school-wide focus on insects. When we’d drop him off or pick him up we would see experiments laid out to determine various properties of ant behavior. We collected arthropods to bring in too, butterflies, bees, spiders, whatever we could find. One evening my wife was…

  • Refigured Data Logger

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    iopadmin
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    The RIMU data logger I built last year received a major upgrade. I added a sound pressure level meter to learn how noisy it is and updated the case to make the switches easy to find, label, and operate. It took a long time to get it working, mainly because I forgot that using the…

  • Better Bread from the Bread Machine

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    iopadmin
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    We have a Cuisinart convection bread machine (CBK-200) that was a given to us for Christmas one year. It is an attractive and well-featured machine, but I haven’t had much loaf success with it. We have had bread machines in the past. The Cuisinart tries to produce a loaf which is horizontal, like a loaf…

  • Another Ink Test

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    iopadmin
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    This ink test is starting to feel obsessive, but I got a technical pen and it came with Koh-I-Noor Rapidograph Ultradraw (3085-F) ink, which says it is an India ink for use on paper and film—by which they mean drafting film. I tested it with a dip pen, and smeared part of it after about…

  • Additional Photo Marking Solution

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    The problem, recall, is getting an archival (or at least photo safe) ink to stick to the back of a resin-coated photograph. Almost anything consumers buy now is resin (polyethylene) coated. In my last post I discussed that only the Zig Photo Signature pen and the Zig Millenium produced reasonable results. The remaining problems are:…

  • Pens for the Backs of Photographs

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    iopadmin
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    The Problem As I scan and archive photographic prints I want, at a minimum, to note that they have been scanned and when. I may wish to note some of the subject or photographer information. I have the same objectives for recent prints, for example from the portrait studio. The first part of the problem…

  • Smoking Good Ribs—Temperature Management

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    iopadmin
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    I have smoked ribs about four times in the last couple years. I’ve been fortunate enough to have my father’s MasterBuilt smoker. It is a box about the size of a dorm fridge, and can readily smoke two racks, each cut in half. It has electronic temperature management and is well insulated. I’m fond of…