This could get very complicated very quickly Why not try starting off with a block diagram of all the elements in your system, and the audio/control signal flow between them, then flesh that out into schematics for each element, building and testing each one separately to see how things work.
If you want nice filters, you're probably going to have to actually build those rather than doing it in software. Maybe some of the more senior coders here with vastly more talent than I have will disagree, but I can't see that working out too well in software on an Uno.
I was asked about this by a friend and thought I'd re-ask it here as I didn't know If someone wanted to play with computer vision for the purposes of optically tracking a moving target, what sort of kit would he need to buy as a bare minimum for learning the basic principles?
The brief is for an airsoft/paintball smart sentry gun that should only react to something that looks like a person, and follow it once within it's field of view... as far as I'm aware time and money are no object but the initial outlay should be as low as possible in case of a "waaah it's too hard" meltdown
Your capacitor selection depends entirely on it's role in the circuit. Different ones are best for different applications, that's why there's so many! I'm sure one of the senior members here would elaborate further on which types are most used for what. What circuit are you using them in?
No idea, Lefty! It's not my design But the test itself has been unchanged for years... I can only assume those who designed the setup know what they're doing.
The sounders don't actually come with seal tabs on them (which seems odd, as all the ones I've actually bought came with them and I don't normally pull them off until I'm done with them). If the IPA has done something horrible to the innards then I suppose there's little I can do other than apologise and make some more...
I wonder, is it worth opening one up completely to investigate any possible internal damage? We've got thousands on the shelf so I could compare a new one to one that I've molested to see if there's any difference.
Electrical noise is unwanted signals causing undesired operation. Imagine if you're trying to listen to a faint tone against a background of loud static... in simplest terms it's a little bit like that.
EDIT: Here's a thing on RC filters to get you started.