Category Archives: DIY

David Laserscanner with webcam & line laser, Tools for capturing 3D objects

Posted on 4 August 2013 by Admin

A tool called DAVID LASERSCANNER has a free alternative with limited options. The main limitation is that one can save captures with lower resolution only. The tool is shown below. And the setup consists of “corner with calibration picture”, line … Continue reading →

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DIY Star Chart (planisphere)

Posted on 7 April 2013 by Admin

There are 2 great sources if you wish to create yor own star chart. Online planisphere tool Ready made Uncle Al’s Starwheels in Wikipedia: A planisphere is a star chart in the form of two adjustable disks that rotate on … Continue reading →

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Using ImageMagick to reveal existence of hidden steganographic messages with DIY IM-simpleGUI tool

Posted on 24 February 2013 by Admin

Tools used ImageMagick is a powerfull CLI tool for image processing. For different commands, see their www pages. The following commands are used in this blog: compare convert montage In addition ImageMagick contains image filters like Laplacian (IM, wikipedia), Sobel … Continue reading →

Posted in Anvanced Tools, Audio and Video, DIY, Recommended Free Tools, Security Training, Awareness and Reports, Tests, Tips | Comments Off

DIY Spectrometer, and notes on online Spectral Workbench

Posted on 6 February 2013 by Admin

There exist several variations of DIY spectrometer by using CD or DVD as the main component (ie. generating the rainbow of colors by diffraction from the optical disk grooves). The output is a spectra, light intensity versus wavelength. In Wikipedia: … Continue reading →

Posted in Android, Anvanced Tools, DIY, For Fun or Interest, Gadgets, Hobbies and Other Interests, Tests | Comments Off

DIY heater for digital camera

Posted on 23 January 2013 by Admin

Once, when taking outside photos, the digital camera (Canon SX1) started to get problems. I hadn’t thought about it much earlier, but obviously -18 degree Celsius was too much for the electronics. Quick search on internet showed several DIY heater … Continue reading →

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Test, DIY webcam microscope

Posted on 2 January 2013 by Admin

I happened to have 2 broken gadgets: a webcam with broken optics but with working sensor, and a digital pocket camera with working optics but with broken electricity. The question was that what happens when changing the optics of the … Continue reading →

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Test, convert normal webcam into night vision webcam (infrared)

Posted on 2 January 2013 by Admin

Many of the webcam contain a IR-filter to block the infrared light from the sensor. It is possible to turn the webcam into night vision webcam by removing the internal IR-filter and replacing it with “visible light” blocking material. The … Continue reading →

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