I used the same technique that Mr. Grill did to generate pseudo-random numbers for a PIC program I wrote once. I copied a random noise generator off the web, like Mr. Grill did and like him, I wrote software code to emulate the function of the hardware. The main program would just look at the number in one of the registers to get a "random" number. I only needed an 8-bit random number, but 16 bits would have been available, had I implemented all 16 bits. There is probably no limit to how many bits you can do with this technique.
Great job, William. Comments in your code would be helpful, however.
When I was in the Mormon Church many years ago, there was white noise piped to speakers in the hallway, so that one could not listen in on conversations in the classrooms or offices. One day lightning damaged the sound system. The amplifier system was in a closet and consisted of several 100W power amplifier modules, a white noise generator, preamplifier and power supply. The sanctuary volume was remotely controlled from the stage. The power amplifier that powered the sanctuary speakers was damaged by lightning, and I temporarily replaced it with the masking system amplifier which was identical to it, but set to a much lower level. I repaired the power amplifier and being identical to the others, I plugged it into the masking amplifier slot. I forgot to turn the gain down and when I turned the system on, it sounded like the space shuttle was being launched from our church hallway.
Until called upon to repair the sound system, I just thought that the soft rushing sound I heard in the hallway was the air conditioning. Until then, I had never even heard of a masking system.
I also find noise iritating, especially when it is added to mask other sounds.
The most offensive noise, though, has been added to a local food establishment to simulate the sounds of a crowd having a good time. My meal companions had not noticed it until I pointed out that none of the other patrons were being that noisey, and as they looked around they realized that it was true, others were quietly talking in their own booths, while the ambient din was much louder than that. This is especially bothersome to me because I have damaged hearing, and the increase in ambient noise tends to make having a conversation difficult.
But even worse than that is the background "music" played in both offices and some stores. This is never the good quality stuff, but rather the stuff that is available much cheaper because nobody liked it. ( I am referring to the copyright fees). That garbage, played through paging trumpet speakers, is quite offensive to my ears.
I hear what everyone says about the pluses and minuses of white noise. Some like it, while some don't.
Here's an odd, somewhat off topic question. I work in a noisy environment, and need a timer that would normally beep. I have to look out the window, so I can't look at the timer, so I need something that "bumps" - like a vibrator that vibrates once. Some cell phones have this when you turn them on - you hold the on button for three seconds, and you feel them "jump".
What is this component called. I've searched "thumpers" (and learned a new game), and searched "vibrators" (and got some interesting stuff).
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
In a bid to boost the viability of lithium-based electric car batteries, a team at Lawrence Berkeley National Laboratory has developed a chemistry that could possibly double an EV’s driving range while cutting its battery cost in half.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.