Thank you, first 'Dulap' Subscriber!

Congratulations to the very first ‘Dulap’ subscriber of my machine rack service! … installed with a colocated customer-owned FG (this service carries no additional charge!) : Thank you for your business!

“Finite Field Arithmetic.” Chapter 18C: Peh School: Generation of Cryptographic Primes.

This article is part of a series of hands-on tutorials introducing FFA, or the Finite Field Arithmetic library. FFA differs from the typical “Open Sores” abomination, in that — rather than trusting the author blindly with their lives — prospective users are expected to read and fully understand every single line. In exactly the same […]

X-Ray Large-Format Kindergarten.

Below is the output of a new test-fire of the PCB radiography system, this time using FujiFilm “Super HR-T Medium Speed” (25×20 cm) film in place of the earlier self-developing dental Eco-30. However, the time has not yet come to molest the MacIvory — first, we must characterize the film and the pertinent chemistry. This […]

X-Ray Spectrography Kindergarten.

This article is a continuation of “X-Ray Microscopy Kindergarten.”. Preliminary experiment with multi-energy x-ray (colour channel combination), distinguishing materials by absorption at different wavelengths. The tube appears to exhibit some “heel effect” at the longer wavelengths. Exposure: 75 sec. @ 35kV, 21kV, 20kV (R, G, B) film: “Eco-30”.

X-Ray Stereography Kindergarten.

This article is a continuation of “X-Ray Microscopy Kindergarten.”. Here, we see a stereo pair (approx. +/- 25 deg. one-axis rotation of the object from the horizontal plane, while film is stationary) of the device from before. The vias are clearly distinguishable. Exposure: 70 sec. @ 34kV; 0.3mA + 2x beam spread; film: “Eco-30”.

X-Ray Microscopy Kindergarten.

This article is a continuation of “PCB Radiography Kindergarten, Continued.”. The radiography system is equipped with a “microfocus” tube, and its beam has a 30 degree spread cone. So we can get a look at that very same FG TRNG XC9572 CPLD seen earlier, but with 2x magnification: Click for full resolution (Warning: 7MB) This […]

PCB Radiography Kindergarten, Continued.

This article is a continuation of “PCB Radiography Kindergarten”. This was a second test-fire of that radiography system, using yet-another board where I already know where everything is (on account of having designed it.) This time, the victim is a FG TRNG Mainboard: Click for full resolution (Warning: 16MB) For comparison, a visible-light photograph of […]

PCB Radiography Kindergarten.

Below is the result of test-firing a newly-installed miniature PCB radiography system. The victim is a standard FG TRNG Analogue Unit: Click for full resolution (Warning: 14MB) Detail of left op amp, with bonding whiskers visible: The substrate, aluminum RF shield frame, SMT contacts, vias, and the two layers of the PCB are clearly distinguishable. […]