Random Numbers

How can you get Random numbers from a Computer or PLC?
HowStuffWorks has an article that explains this very well.
The numbers you get from a machine are not truly random.
They are called pseudo-random numbers.
Alaric posted some code written for an Allen Bradley Micrologix PLC.
It generates a random output based on the free running clock. Here's the PDF Version.(17.5 KB)

It's Official, I'm the Expert

An odd search string in Google brought one unsuspecting visitor to my other blog. This crowd ought to get a kick out of this.

ZEPP

Zero-Emission Power Plant
The Industrial Physicist has an interesting article on using methane as fuel.

The author wants to store the only waste gas CO2 in used up oilfield resevoirs.

Build Your own Welder

plcnewbie Found this website dedicated to building your own welder.
I never knew you could do that with an automobile alternator.