-
"Five programming problems every Software Engineer should be able to solve in less than 1 hour."
There's been a fair bit of discussion over at Reddit about this blog post: https://blog.svpino.com/2015/05/07/five-programming-problems-every-software-engineer-should-be-able-to-solve-in-less- ( Read more... ) -
Reverse-engineering the silicon of a 7805 voltage regulator.
Love the interactive map of the chip!
http://www.righto.com/2014/09/reverse-engineering-counterfeit-7805.html -
From Ben Krasnow's new YouTube channel: Make a microgram scale from an old panel meter!
That is really cool. I suspect the opto he used had a Schmitt trigger output. The circuit would work even better with a true analog output opto...
http://www.youtube.com/watch?v=ta7nlkI5K5g -
A scale so sensitive it can track your heartbeat.
I didn't think my respect for Jim Williams could get any higher. This, however... this is the nuclear option. I am literally in awe. I have seen the face of my god, and it is Jim.
( Read more... ) -
Fast (over-)estimation of sqrt(N) for memory constrained computers.
Say you're trying to use a computer to factor a number, N. N is large and you want to stop as soon as possible in the case that it's a prime.
If you don't have a lot of memory to work with, then the obvious thing is some kind of optimized trial division. (Which is not the same as - and not to be confused with - the Sieve of Eratosthenes. SoE has a ( Read more... ) -
Multi-meter? Moar liek MELTY-METER, amirite??
Oh the lulz...
One our our techs at work was tasked with repairing and testing a very large (1,000 W) power supply unit. Meet the Sorensen DCS 20-50:
( Read more... )
