Recent content by Kurinn

Sorry. To be clear, let's step back a bit. I want to create a visualizer which uses red for base, green for mid-range, and blue for high frequencies. It effectively drives effects lighting, but it is in some crude sense a spectrum analyzer. Filters cut off low, mid-range, and high frequencies...

I'm working on a project that involves taking the audio output from a consumer device like an iPod or whatever, filtering for low, mid, and high frequencies, and then converting the levels into a PWM to drive LEDs for each frequency range. Passive filters will separate the low (<500 Hz), mid...

I heard something about nanotech and lithium cells. I'd put my money there, if I had any. Of course, there is always the nuclear option. Alpha or beta-voltaics are most commonly used in stuff like pacemakers. It's basically alpha or beta particles and a p-n junction. Simple things, I suppose...

Ah, that's probably what got me. I realize now that I had used the figure I got off of the DMM's tester to make my calculations. Thank you.

Did you have a load at the output? The calculations for gain with a load involved are different. Aside from that, even if you're careful with your calculations, you won't necessarily get what you expect. I just finished a term project consisting of a two stage amplifier. A self-bias JFET...

Well, just at a glance your math looks okay. About the rest of your idea, I'm not so sure. Working with wet, conductive stuff, and hundreds(!) of Amperes of AC is not my ideal afternoon. I really hope you have some notional understanding of what I'm talking about when I say that this would be...

You could always use optical line-of-sight repeaters to cross longer distances where you can't get the power you would need for RF due to licensing or other considerations. Lasers aren't that expensive these days, although I'd imagine you'd have to design/build your own transceivers. I've never...

I'm glad I can be of assistance. Still, if you think you have any symptoms of heart trouble, your best bet is to consult a cardiologist. I'm no doctor, so I can't offer any specific help, just general information. I know a lot of people can't afford health care these days, but if you feel that...

Artificially induced fluctuations in nerve potentials can cause them to fire at the wrong time. Both alternating and direct current sources can cause arrhythmia and subsequent cardiac arrest. I wouldn't say either one is safer in that regard. Just in general, high voltage is high voltage. Once...

I think this depends a lot on what exactly constitutes a "bad heart" in your mind. There are a lot of specific conditions which could make a heart "bad". In general, a heart that isn't working at 100% output to begin with will have to work harder to keep up with rigorous physical activity. Work...