pjbk

20 ms·

151.
by pjbk 7y ago
It will prevent the plastic layers from detaching too easily. Specially if you do the etching in a warm bath. If you do it right, the finish is far superior than using a marker, in particular edge traces that turn out very well defined. Tha
152.
by pjbk 7y ago
Good question. Not yet. When I carried out the tests (3+ years ago) I didn't have PETG filament around. Then TPU worked well for me and I have been sticking with it. I have a couple of PETG spools now so I will certainly try it next ti
153.
by pjbk 7y ago
As I stated above, use TPU or Ninjaflex filament. It adheres very well to a clean copper surface. Start etching immediately after printing.
154.
by pjbk 7y ago
Adherence. Normal PLA/ABS or other plastic filaments will shrink when they cool down, and cause the thin layer of material to pull and separate from the copper. TPU is rubber-like and will have less inner stress to pull the material of
155.
by pjbk 7y ago
Don't use a marker. I use 2-3 layers of TPU filament or Ninjaflex over copper treated with washable adhesive. Works wonderfully. As always, clean the copper very well with isopropyl before anything. You can also do flex PCBs this way:
156.
by pjbk 7y ago
Reading some comments here... * GA provides some nice savings when it comes to rotor/3D calculations, provided that the underlying data structures and architecture supports them. Check out the publications by Dietmar Hildenbrand and hi
157.
by pjbk 7y ago
Zipline?
158.
by pjbk 7y ago
So sad. I learned to program with my Atari 130XE, mainly in 6502 Assembly. Truly respected him and his constant engineering and entrepreneurship efforts. The Computer History Museum interviewed him back in 2014 and posted the video on YT ea
159.
by pjbk 7y ago
Now whenever I read articles of this type of statistical research, my mind immediately recalls Tyler Vigen's website and book... http://tylervigen.com/spurious-correlations
160.
by pjbk 7y ago
I second some of the comments posted there. I have been following Rust's evolution since its beginnings --as mainly an embedded systems programmer I was acquainted with Cyclone-- and through the years I have tried its different incarna
161.
by pjbk 7y ago
The implementation itself is relatively simple. The most popular Python implementation is Tom Cocagne's pysrp that builds on csrp, his original C implementation: https://github.com/cocagne/pysrp . I used this as a
162.
by pjbk 7y ago
Correct, and it also appears in Electromagnetism and Quantum Physics (in several ways), and in Lie theory that is useful for rotations and differential applications.
163.
by pjbk 7y ago
For those into physics, I wholeheartedly recommend Marsden and Ratiu's book, "Introduction to Mechanics and Symmetry", which deals mainly with the different formulations of physics applied to symplectic and associated geometr
164.
by pjbk 7y ago
Actually, that is the reason Apple HomeKit, that is designed mostly for IoT devices (WiFi, BT), uses SRP as part of the authentication process during pairing.
165.
by pjbk 7y ago
There were some very nice early ARM-Linux boards based on it. For example, the LART was an open design made by a group at the Delft University centered on the SA1100. Pretty cool times especially if you were into embedded devices that could
166.
by pjbk 7y ago
Exactly, and structural and functional constraints over properties and rules. I understand the need to reinvent the wheel, but most of these efforts feel to me like customizations that most declarative languages can provide, albeit possibly
167.
Audio Test Kitchen – Compare 300 Microphones(audiotestkitchen.com)
2 points by pjbk 7y ago|0 comments
168.
by pjbk 7y ago
Depends on the location, but a crashing house market halving the price (or even more) of properties is not uncommon. It happened in the last one.
169.
by pjbk 7y ago
Some of us work in regulated industries where coding standards are not strong suggestions but unconditional requirements. Unambiguous names and identifiers precludes the use of Nim as a tool in any of those fields just by an improper design
170.
by pjbk 7y ago
> which leads to their production becoming better and better, which leads to a better product, but less innovation. "Better" in the sense that they are more polished and edited, but unfortunately that means more filtered, targe
171.
by pjbk 7y ago
And not only that. Even if there is money on the table or lives at stake, many companies choose to outsource embedded development instead of increasing salaries to attract top talent. Just recently Boeing software practices were heavily cri
172.
by pjbk 7y ago
Tornado. That brings me memories. ;-) IMHO it was much better than the current Eclipse-based IDE they have now. At the time, and especially with custom SoCs or CPUs like the SPARC you were using, there were very few options to do that. Thes
173.
by pjbk 7y ago
Embedded systems here, several projects using VxWorks through the years. Mostly safety motion controllers, robotics, medical and consumer FPGA processing boards. Due to cost and availability of modern tools (compilers, testing, V&V, CI&
174.
by pjbk 7y ago
> Some people work and produce stuff, some people do not. And some other people print money, whose value should be tied somewhat to the stuff that some people did or will certainly produce, but now most often does not.
175.
by pjbk 7y ago
I guess many institutions and research groups can write similar accounts. Even the late 80s were somewhat productive concerning NNs and what today we call ML, just by searching publications of that era. We had also some relatively sophistic
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by pjbk 7y ago
Or just wait till we have a distributed problem recognizer or single-conscience general AI: solved and automated once, replicated and reused forever.
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by pjbk 7y ago
SystemVerilog and synthesizable SystemC, at least.
178.
by pjbk 7y ago
Does anyone remember the old Kartoo graphical/relational search engine? (Not its current hijacked reincarnation at kartoo.com) It was not very practical as a generic search engine, but I found some very interesting links following the
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by pjbk 7y ago
Being this HN, I clicked and I was not disappointed.
180.
by pjbk 7y ago
This is great news! Will check if they fixed the issues loading files with autoconnectors, which was the only thing preventing me to use it for engineering diagrams. I just wish that Krita had the same text editing capabilities as Inkscape.

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